• Truma Combi Eco Plus on 12 V?

    From Ted Heise@21:1/5 to All on Tue Nov 19 15:19:12 2024
    Hi all,

    I may have alluded to this before, but last time we camped on a
    flatspot in our Lance 1475 the night temps dropped into the 40s or
    50s and I had trouble running the furnace on 12 V. It's a Truma
    Combi Eco Plus; the gas would fire up and the fan would run for a
    minute or two, then stop--without having brought the inside temp
    up to the thermostat setting.

    You may recall that this unit was replaced under warranty earlier
    this year (due to E6H error codes suggesting combustion air motor
    problems). But this more recent behavior doesn't seem connected.

    As near as I can tell, the unit should run on propane with 12 V
    power for the fan. The battery was at full 100 Ah capacity, so it
    wasn't a low charge state. I'm wondering if being LI is a factor,
    for example is it possible there is internal resistance in the
    battery that limits the current? Seems crazy, but I'm not sure
    what else to think. FWIW, it's a Li Time battery (from China),
    and has worked as expected or even better.

    I plan to call my dealer, but thought I'd check in with the
    experienced folks here first.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

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  • From sticks@21:1/5 to Ted Heise on Tue Nov 19 11:48:15 2024
    On 11/19/2024 9:19 AM, Ted Heise wrote:
    Hi all,

    I may have alluded to this before, but last time we camped on a
    flatspot in our Lance 1475 the night temps dropped into the 40s or
    50s and I had trouble running the furnace on 12 V. It's a Truma
    Combi Eco Plus; the gas would fire up and the fan would run for a
    minute or two, then stop--without having brought the inside temp
    up to the thermostat setting.

    You may recall that this unit was replaced under warranty earlier
    this year (due to E6H error codes suggesting combustion air motor
    problems). But this more recent behavior doesn't seem connected.

    As near as I can tell, the unit should run on propane with 12 V
    power for the fan. The battery was at full 100 Ah capacity, so it
    wasn't a low charge state. I'm wondering if being LI is a factor,
    for example is it possible there is internal resistance in the
    battery that limits the current? Seems crazy, but I'm not sure
    what else to think. FWIW, it's a Li Time battery (from China),
    and has worked as expected or even better.

    I plan to call my dealer, but thought I'd check in with the
    experienced folks here first.


    If the furnace actually operates as it should when it is running, I
    would first think about the thermostat. For example, I would try and
    raise it higher to see if it runs longer and then shuts off still
    without reaching desired temperature. If it still does this, I would be interested in finding out where the probe for temperature sensing is
    located. It might just be too far away from the thermostat, and too
    close to the hot air vents. This unit has a setting for temperature
    offset for RV's where this is an issue. If the furnace shuts off 5
    degrees before desired temp, you adjust the offset by this amount.


    --
    I Stand With Israel!

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  • From Ted Heise@21:1/5 to sticks on Tue Nov 19 17:53:01 2024
    On Tue, 19 Nov 2024 11:48:15 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 9:19 AM, Ted Heise wrote:

    I may have alluded to this before, but last time we camped on
    a flatspot in our Lance 1475 the night temps dropped into the
    40s or 50s and I had trouble running the furnace on 12 V.
    It's a Truma Combi Eco Plus; the gas would fire up and the fan
    would run for a minute or two, then stop--without having
    brought the inside temp up to the thermostat setting.

    You may recall that this unit was replaced under warranty
    earlier this year (due to E6H error codes suggesting
    combustion air motor problems). But this more recent behavior
    doesn't seem connected.

    As near as I can tell, the unit should run on propane with 12
    V power for the fan. The battery was at full 100 Ah capacity,
    so it wasn't a low charge state. I'm wondering if being LI is
    a factor, for example is it possible there is internal
    resistance in the battery that limits the current? Seems
    crazy, but I'm not sure what else to think. FWIW, it's a Li
    Time battery (from China), and has worked as expected or even
    better.

    If the furnace actually operates as it should when it is
    running, I would first think about the thermostat. For
    example, I would try and raise it higher to see if it runs
    longer and then shuts off still without reaching desired
    temperature. If it still does this, I would be interested in
    finding out where the probe for temperature sensing is located.
    It might just be too far away from the thermostat, and too
    close to the hot air vents. This unit has a setting for
    temperature offset for RV's where this is an issue. If the
    furnace shuts off 5 degrees before desired temp, you adjust the
    offset by this amount.

    Thanks for the thoughts, but I'm a bit skeptical of that
    possibility because it ran fine once I fired up the generator.
    My bad for not mentioning that bit.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to Ted Heise on Tue Nov 19 12:05:47 2024
    On 11/19/2024 11:53 AM, Ted Heise wrote:
    On Tue, 19 Nov 2024 11:48:15 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 9:19 AM, Ted Heise wrote:

    I may have alluded to this before, but last time we camped on
    a flatspot in our Lance 1475 the night temps dropped into the
    40s or 50s and I had trouble running the furnace on 12 V.
    It's a Truma Combi Eco Plus; the gas would fire up and the fan
    would run for a minute or two, then stop--without having
    brought the inside temp up to the thermostat setting.

    You may recall that this unit was replaced under warranty
    earlier this year (due to E6H error codes suggesting
    combustion air motor problems). But this more recent behavior
    doesn't seem connected.

    As near as I can tell, the unit should run on propane with 12
    V power for the fan. The battery was at full 100 Ah capacity,
    so it wasn't a low charge state. I'm wondering if being LI is
    a factor, for example is it possible there is internal
    resistance in the battery that limits the current? Seems
    crazy, but I'm not sure what else to think. FWIW, it's a Li
    Time battery (from China), and has worked as expected or even
    better.

    If the furnace actually operates as it should when it is
    running, I would first think about the thermostat. For
    example, I would try and raise it higher to see if it runs
    longer and then shuts off still without reaching desired
    temperature. If it still does this, I would be interested in
    finding out where the probe for temperature sensing is located.
    It might just be too far away from the thermostat, and too
    close to the hot air vents. This unit has a setting for
    temperature offset for RV's where this is an issue. If the
    furnace shuts off 5 degrees before desired temp, you adjust the
    offset by this amount.

    Thanks for the thoughts, but I'm a bit skeptical of that
    possibility because it ran fine once I fired up the generator.
    My bad for not mentioning that bit.


    The unit shuts off when voltage gets below 11 volts. I know it's
    supposed to be a good battery, but the only way to know for sure what's
    going on I think would be to put a voltage tester on the battery when
    the heater is on and see how low it goes when the fan kicks in.

    110 AC is definitely preferable for the unit, but it should go at least
    one night I would think an the battery and you'd charge it up the next day.


    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to sticks on Tue Nov 19 22:15:27 2024
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:
    On Tue, 19 Nov 2024 11:48:15 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 9:19 AM, Ted Heise wrote:

    I may have alluded to this before, but last time we camped
    on a flatspot in our Lance 1475 the night temps dropped into
    the 40s or 50s and I had trouble running the furnace on 12
    V. It's a Truma Combi Eco Plus; the gas would fire up and
    the fan would run for a minute or two, then stop--without
    having brought the inside temp up to the thermostat setting.

    If the furnace actually operates as it should when it is
    running, I would first think about the thermostat...

    Thanks for the thoughts, but I'm a bit skeptical of that
    possibility because it ran fine once I fired up the generator.
    My bad for not mentioning that bit.

    The unit shuts off when voltage gets below 11 volts. I know
    it's supposed to be a good battery, but the only way to know
    for sure what's going on I think would be to put a voltage
    tester on the battery when the heater is on and see how low it
    goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it as
    simple as putting the multimeter probes on each battery post while
    starting up the furnace?

    FWIW, the battery also has a nice bluetooth interface that gives a
    lot of detail about its state (including voltage). Don't recall
    seeing the voltage drop much from the nominal 12.8 V, but then I
    haven't really watched it much.


    110 AC is definitely preferable for the unit, but it should go
    at least one night I would think an the battery and you'd
    charge it up the next day.

    Yeah, that was my thinking too. I'd like to be able to camp in
    remote National Forest areas in the Rockies, but if the furnace
    won't run on 12 V that may be a non starter.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to Ted Heise on Tue Nov 19 17:41:32 2024
    On 11/19/2024 4:15 PM, Ted Heise wrote:
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:
    On Tue, 19 Nov 2024 11:48:15 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 9:19 AM, Ted Heise wrote:

    I may have alluded to this before, but last time we camped
    on a flatspot in our Lance 1475 the night temps dropped into
    the 40s or 50s and I had trouble running the furnace on 12
    V. It's a Truma Combi Eco Plus; the gas would fire up and
    the fan would run for a minute or two, then stop--without
    having brought the inside temp up to the thermostat setting.

    If the furnace actually operates as it should when it is
    running, I would first think about the thermostat...

    Thanks for the thoughts, but I'm a bit skeptical of that
    possibility because it ran fine once I fired up the generator.
    My bad for not mentioning that bit.

    The unit shuts off when voltage gets below 11 volts. I know
    it's supposed to be a good battery, but the only way to know
    for sure what's going on I think would be to put a voltage
    tester on the battery when the heater is on and see how low it
    goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it as
    simple as putting the multimeter probes on each battery post while
    starting up the furnace?

    FWIW, the battery also has a nice bluetooth interface that gives a
    lot of detail about its state (including voltage). Don't recall
    seeing the voltage drop much from the nominal 12.8 V, but then I
    haven't really watched it much.

    My first question is in making sure your charging system settings are
    actually set to charge a lithium battery. Lithium batteries have a very
    flat discharge voltage line. At 12.8 volts, you could be at the very
    end of the effective available power if it is charging the battery like
    an AGM battery. This page gives a little cell voltage info.

    <https://www.renogy.com/blog/lifepo4-voltage-chart>

    This video explains some of the difficulties with improper charging
    settings.

    <https://www.youtube.com/watch?v=nC-wZgKqpkw>

    I don't have lithiums, but I think you can use a combination of your app
    and a voltage tester to see what the voltage is. The problem is you
    have no idea where on the line you are at before it has the big drop
    off. Your charging system has to know they are lithium batteries to
    properly give them a full charge.

    110 AC is definitely preferable for the unit, but it should go
    at least one night I would think an the battery and you'd
    charge it up the next day.

    Yeah, that was my thinking too. I'd like to be able to camp in
    remote National Forest areas in the Rockies, but if the furnace
    won't run on 12 V that may be a non starter.

    It will do it, you just have to pin down what the issue is with your
    battery system. I was charging mine at the wrong setting for a short
    time. My wet batteries won't exhibit the problems yours can and I
    didn't hurt it. Fortunately, if you are not charging yours properly in
    most cases it can be fixed.


    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to sticks on Wed Nov 20 15:55:44 2024
    On Tue, 19 Nov 2024 17:41:32 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 4:15 PM, Ted Heise wrote:
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:

    Thanks for the thoughts, but I'm a bit skeptical of that
    possibility because it

    [the Truma Combi Eco Plus ran only for 1-2 minutes on 12 V
    but] ran fine once I fired up the generator.

    The unit shuts off when voltage gets below 11 volts. I
    know it's supposed to be a good battery, but the only way
    to know for sure what's going on I think would be to put a
    voltage tester on the battery when the heater is on and see
    how low it goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it as
    simple as putting the multimeter probes on each battery post
    while starting up the furnace?

    FWIW, the battery also has a nice bluetooth interface that
    gives a lot of detail about its state (including voltage).
    Don't recall seeing the voltage drop much from the nominal
    12.8 V, but then I haven't really watched it much.

    My first question is in making sure your charging system
    settings are actually set to charge a lithium battery.

    Yep, should be. The trailers power center has a switch on the
    controller board to set it for LI or LA. It's tiny and out of the
    way, but I'm pretty sure that's set correctly.


    Lithium batteries have a very flat discharge voltage line. At
    12.8 volts, you could be at the very end of the effective
    available power if it is charging the battery like an AGM
    battery. This page gives a little cell voltage info.

    <https://www.renogy.com/blog/lifepo4-voltage-chart>

    Yeah, I just used "12.8" as the nominal output per the manual. It
    also shows the voltage being higher until it's discharged quite a
    lot.


    I don't have lithiums, but I think you can use a combination of
    your app and a voltage tester to see what the voltage is. The
    problem is you have no idea where on the line you are at before
    it has the big drop off. Your charging system has to know they
    are lithium batteries to properly give them a full charge.

    Sounds good, thanks.


    110 AC is definitely preferable for the unit, but it should
    go at least one night I would think an the battery and
    you'd charge it up the next day.

    Yeah, that was my thinking too. I'd like to be able to camp
    in remote National Forest areas in the Rockies, but if the
    furnace won't run on 12 V that may be a non starter.

    It will do it, you just have to pin down what the issue is with
    your battery system. I was charging mine at the wrong setting
    for a short time. My wet batteries won't exhibit the problems
    yours can and I didn't hurt it. Fortunately, if you are not
    charging yours properly in most cases it can be fixed.

    Pretty sure I'm charging it properly, and somewhat sure it was
    still reasonably fully charged (maybe 70%?) when the problem
    occurred. But it may have been lower, I suppose.

    We have cold weather coming in, so I will be making my way out to
    the unit in storage to test out the battery voltage and whether it
    will run the furnace fan as it should.

    If the prior problem still shows, I'll give the dealer a call. If
    the voltage drops when trying to run the fan, maybe I'll pick up a
    standard lead acid battery to try.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to Ted Heise on Sun Dec 1 02:41:57 2024
    On Wed, 20 Nov 2024 15:55:44 -0000 (UTC),
    Ted Heise <theise@panix.com> wrote:
    On Tue, 19 Nov 2024 17:41:32 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 4:15 PM, Ted Heise wrote:
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:

    [the Truma Combi Eco Plus ran only for 1-2 minutes on 12 V
    but] ran fine once I fired up the generator.

    The unit shuts off when voltage gets below 11 volts. I
    know it's supposed to be a good battery, but the only way
    to know for sure what's going on I think would be to put
    a voltage tester on the battery when the heater is on and
    see how low it goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it
    as simple as putting the multimeter probes on each battery
    post while starting up the furnace?

    Lithium batteries have a very flat discharge voltage line.
    At 12.8 volts, you could be at the very end of the effective
    available power if it is charging the battery like an AGM
    battery. This page gives a little cell voltage info.

    <https://www.renogy.com/blog/lifepo4-voltage-chart>

    Yeah, I just used "12.8" as the nominal output per the manual.
    It also shows the voltage being higher until it's discharged
    quite a lot.

    Pretty sure I'm charging it properly, and somewhat sure it was
    still reasonably fully charged (maybe 70%?) when the problem
    occurred. But it may have been lower, I suppose.

    We have cold weather coming in, so I will be making my way out
    to the unit in storage to test out the battery voltage and
    whether it will run the furnace fan as it should.

    Okay, I was able to get out to the trailer this afternoon. It was
    about 29 F. I installed the battery and put a multimeter across
    the two terminals. It read 13.28/13.29 V, same as the app (which
    showed 13.3 V and 99% SOC).

    After turning on at the disconnect and opening the propane tank, I
    fired up the Truma on gas only and heat only (no water heater
    because it's drained) and the fan on eco. It fired up and ran
    fine for ~6 minutes with hot air starting to come out of the
    nearest vents. The multimeter showed ~13.21 V, and the app also
    showed 13.2 V with an estimated 40 hours of run time.

    I then changed the fan speed to high, and ran it out to half an
    hour without it shutting off. The temp in the trailer had risen
    from 29 to 40 F by then and the multimeter still showed ~13.2 V.

    So it seems all is well, and I should get a night's worth of
    heating from the battery. The only other thing that would be
    running would be the fridge, and that would be on propane and
    drawing electricity only for the controls. So not much, I think.

    Not sure why the furnace was shutting down after a couple of
    minutes back in early October. It's possible the battery was too,
    low, but I'm pretty skeptical of that. Maybe more likely is the
    air temp in the unit was not enough lower than what I'd set the
    thermostat at for it to stay on. That also seems unlikely, though
    I don't recall exactly what the temps (in trailer and set point)
    were.

    Guess I'll leave it be and hope all is fine next time we need it.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to sticks on Sun Dec 1 16:42:21 2024
    On Sun, 1 Dec 2024 10:24:27 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/30/2024 8:41 PM, Ted Heise wrote:

    Okay, I was able to get out to the trailer this afternoon.
    It was about 29 F. I installed the battery and put a
    multimeter across the two terminals. It read 13.28/13.29 V,
    same as the app (which showed 13.3 V and 99% SOC).

    After turning on at the disconnect and opening the propane
    tank, I fired up the Truma on gas only and heat only (no water
    heater because it's drained) and the fan on eco. It fired up
    and ran fine for ~6 minutes with hot air starting to come out
    of the nearest vents. The multimeter showed ~13.21 V, and the
    app also showed 13.2 V with an estimated 40 hours of run time.

    I then changed the fan speed to high, and ran it out to half
    an hour without it shutting off. The temp in the trailer had
    risen from 29 to 40 F by then and the multimeter still showed
    ~13.2 V.

    So it seems all is well, and I should get a night's worth of
    heating from the battery. The only other thing that would be
    running would be the fridge, and that would be on propane and
    drawing electricity only for the controls. So not much, I
    think.

    Not sure why the furnace was shutting down after a couple of
    minutes back in early October. It's possible the battery was
    too, low, but I'm pretty skeptical of that. Maybe more likely
    is the air temp in the unit was not enough lower than what I'd
    set the thermostat at for it to stay on. That also seems
    unlikely, though I don't recall exactly what the temps (in
    trailer and set point) were.

    Guess I'll leave it be and hope all is fine next time we need
    it.

    Looks like you're getting more familiar with the app and the
    batteries. Nice job. It looks like the key to these lithium
    batteries is in actually getting them fully charged. At least
    now you know it does all work, and if needed you could always
    pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    I should have added that the multimeter readout went back up to
    almost 13.3 V after I shut down the furnace. The app showed the
    same and 98% charged.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to Ted Heise on Sun Dec 1 10:24:27 2024
    On 11/30/2024 8:41 PM, Ted Heise wrote:
    On Wed, 20 Nov 2024 15:55:44 -0000 (UTC),
    Ted Heise <theise@panix.com> wrote:
    On Tue, 19 Nov 2024 17:41:32 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 4:15 PM, Ted Heise wrote:
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:

    [the Truma Combi Eco Plus ran only for 1-2 minutes on 12 V
    but] ran fine once I fired up the generator.

    The unit shuts off when voltage gets below 11 volts. I
    know it's supposed to be a good battery, but the only way
    to know for sure what's going on I think would be to put
    a voltage tester on the battery when the heater is on and
    see how low it goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it
    as simple as putting the multimeter probes on each battery
    post while starting up the furnace?

    Lithium batteries have a very flat discharge voltage line.
    At 12.8 volts, you could be at the very end of the effective
    available power if it is charging the battery like an AGM
    battery. This page gives a little cell voltage info.

    <https://www.renogy.com/blog/lifepo4-voltage-chart>

    Yeah, I just used "12.8" as the nominal output per the manual.
    It also shows the voltage being higher until it's discharged
    quite a lot.

    Pretty sure I'm charging it properly, and somewhat sure it was
    still reasonably fully charged (maybe 70%?) when the problem
    occurred. But it may have been lower, I suppose.

    We have cold weather coming in, so I will be making my way out
    to the unit in storage to test out the battery voltage and
    whether it will run the furnace fan as it should.

    Okay, I was able to get out to the trailer this afternoon. It was
    about 29 F. I installed the battery and put a multimeter across
    the two terminals. It read 13.28/13.29 V, same as the app (which
    showed 13.3 V and 99% SOC).

    After turning on at the disconnect and opening the propane tank, I
    fired up the Truma on gas only and heat only (no water heater
    because it's drained) and the fan on eco. It fired up and ran
    fine for ~6 minutes with hot air starting to come out of the
    nearest vents. The multimeter showed ~13.21 V, and the app also
    showed 13.2 V with an estimated 40 hours of run time.

    I then changed the fan speed to high, and ran it out to half an
    hour without it shutting off. The temp in the trailer had risen
    from 29 to 40 F by then and the multimeter still showed ~13.2 V.

    So it seems all is well, and I should get a night's worth of
    heating from the battery. The only other thing that would be
    running would be the fridge, and that would be on propane and
    drawing electricity only for the controls. So not much, I think.

    Not sure why the furnace was shutting down after a couple of
    minutes back in early October. It's possible the battery was too,
    low, but I'm pretty skeptical of that. Maybe more likely is the
    air temp in the unit was not enough lower than what I'd set the
    thermostat at for it to stay on. That also seems unlikely, though
    I don't recall exactly what the temps (in trailer and set point)
    were.

    Guess I'll leave it be and hope all is fine next time we need it.

    Looks like you're getting more familiar with the app and the batteries.
    Nice job. It looks like the key to these lithium batteries is in
    actually getting them fully charged. At least now you know it does all
    work, and if needed you could always pull out the generator if you're
    freezing.


    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From George.Anthony@21:1/5 to sticks on Mon Dec 2 17:33:26 2024
    sticks <wolverine01@charter.net> wrote:
    On 11/30/2024 8:41 PM, Ted Heise wrote:
    On Wed, 20 Nov 2024 15:55:44 -0000 (UTC),
    Ted Heise <theise@panix.com> wrote:
    On Tue, 19 Nov 2024 17:41:32 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 4:15 PM, Ted Heise wrote:
    On Tue, 19 Nov 2024 12:05:47 -0600,
    sticks <wolverine01@charter.net> wrote:
    On 11/19/2024 11:53 AM, Ted Heise wrote:

    [the Truma Combi Eco Plus ran only for 1-2 minutes on 12 V
    but] ran fine once I fired up the generator.

    The unit shuts off when voltage gets below 11 volts. I
    know it's supposed to be a good battery, but the only way
    to know for sure what's going on I think would be to put
    a voltage tester on the battery when the heater is on and
    see how low it goes when the fan kicks in.

    Okay, that should be within my rudimentary skillset. Is it
    as simple as putting the multimeter probes on each battery
    post while starting up the furnace?

    Lithium batteries have a very flat discharge voltage line.
    At 12.8 volts, you could be at the very end of the effective
    available power if it is charging the battery like an AGM
    battery. This page gives a little cell voltage info.

    <https://www.renogy.com/blog/lifepo4-voltage-chart>

    Yeah, I just used "12.8" as the nominal output per the manual.
    It also shows the voltage being higher until it's discharged
    quite a lot.

    Pretty sure I'm charging it properly, and somewhat sure it was
    still reasonably fully charged (maybe 70%?) when the problem
    occurred. But it may have been lower, I suppose.

    We have cold weather coming in, so I will be making my way out
    to the unit in storage to test out the battery voltage and
    whether it will run the furnace fan as it should.

    Okay, I was able to get out to the trailer this afternoon. It was
    about 29 F. I installed the battery and put a multimeter across
    the two terminals. It read 13.28/13.29 V, same as the app (which
    showed 13.3 V and 99% SOC).

    After turning on at the disconnect and opening the propane tank, I
    fired up the Truma on gas only and heat only (no water heater
    because it's drained) and the fan on eco. It fired up and ran
    fine for ~6 minutes with hot air starting to come out of the
    nearest vents. The multimeter showed ~13.21 V, and the app also
    showed 13.2 V with an estimated 40 hours of run time.

    I then changed the fan speed to high, and ran it out to half an
    hour without it shutting off. The temp in the trailer had risen
    from 29 to 40 F by then and the multimeter still showed ~13.2 V.

    So it seems all is well, and I should get a night's worth of
    heating from the battery. The only other thing that would be
    running would be the fridge, and that would be on propane and
    drawing electricity only for the controls. So not much, I think.

    Not sure why the furnace was shutting down after a couple of
    minutes back in early October. It's possible the battery was too,
    low, but I'm pretty skeptical of that. Maybe more likely is the
    air temp in the unit was not enough lower than what I'd set the
    thermostat at for it to stay on. That also seems unlikely, though
    I don't recall exactly what the temps (in trailer and set point)
    were.

    Guess I'll leave it be and hope all is fine next time we need it.

    Looks like you're getting more familiar with the app and the batteries.
    Nice job. It looks like the key to these lithium batteries is in
    actually getting them fully charged. At least now you know it does all
    work, and if needed you could always pull out the generator if you're freezing.



    Yep, experience is the best teacher.

    --
    Biden has no idea what he is doing but he’s really, really good at it.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to Ted Heise on Mon Dec 2 16:05:28 2024
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
    sticks <wolverine01@charter.net> wrote:


    Looks like you're getting more familiar with the app and the
    batteries. Nice job. It looks like the key to these lithium
    batteries is in actually getting them fully charged. At least
    now you know it does all work, and if needed you could always
    pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts. Always interesting and
    something we all have an interest in either knowing or learning about.
    I was surprised at the off-topic tendency of this group when I first
    came here, and some research showed there has been a long history of it
    here. But most of those who read this group probably come here for the
    RV stuff, I know I did.

    Having a little withdrawal now from the RV scene with the new rig
    sitting about 15 feet away outside the wall of the garage and the TOAD
    setup all ready to go. I had hoped to travel this winter some, but it
    looks like I'll be getting a shoulder replacement and just need to get
    that done. Anything RV related is good to read now. Keeps me in the game.

    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bfh@21:1/5 to sticks on Mon Dec 2 17:33:11 2024
    sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
       sticks <wolverine01@charter.net> wrote:


      Looks like you're getting more familiar with the app and the
      batteries. Nice job.  It looks like the key to these lithium
      batteries is in actually getting them fully charged.  At least
      now you know it does all work, and if needed you could always
      pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts.  Always interesting and
    something we all have an interest in either knowing or learning about.
    I was surprised at the off-topic tendency of this group when I first
    came here, and some research showed there has been a long history of
    it here.  But most of those who read this group probably come here for
    the RV stuff, I know I did.

    Having a little withdrawal now from the RV scene with the new rig
    sitting about 15 feet away outside the wall of the garage and the TOAD
    setup all ready to go.  I had hoped to travel this winter some, but it looks like I'll be getting a shoulder replacement and just need to get
    that done.

    Good luck to you..........and make sure the surgeon is not a
    Millennial and the replacement parts are not from China.

    Anything RV related is good to read now.  Keeps me in the
    game.

    --
    bill
    Theory don't mean squat if it don't work.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to bfh on Mon Dec 2 23:59:53 2024
    On Mon, 2 Dec 2024 17:33:11 -0500,
    bfh <redydog@rye.net> wrote:
    sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
       sticks <wolverine01@charter.net> wrote:

     Looks like you're getting more familiar with the app and
    the batteries. Nice job. It looks like the key to these
    lithium batteries is in actually getting them fully charged.
    At least now you know it does all work, and if needed you
    could always pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts. Always interesting
    and something we all have an interest in either knowing or
    learning about. I was surprised at the off-topic tendency of
    this group when I first came here, and some research showed
    there has been a long history of it here. But most of those
    who read this group probably come here for the RV stuff, I
    know I did.

    Thanks for the kind words, that's really thoughtful. I've been on
    Usenet for three decades, but only came to this newsgroup a few
    years ago--when I started getting serious about a trailer.

    Since I began, Many groups have died, some have moved (at least in
    part) to Facebook, and a few are still active. That last category
    is mostly oldtimers who know each other and hang around as much
    out of habit as anything else. They tend to also have a lot of
    off topic banter, so this group isn't unique in that respect.


    Having a little withdrawal now from the RV scene with the new
    rig sitting about 15 feet away outside the wall of the garage
    and the TOAD setup all ready to go. I had hoped to travel
    this winter some, but it looks like I'll be getting a shoulder
    replacement and just need to get that done.

    Good luck to you..........and make sure the surgeon is not a
    Millennial and the replacement parts are not from China.

    Gotta be frustrating to put the new adventures on hold. I'll add
    my best wishes for a successful outcome!

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to Ted Heise on Wed Dec 4 10:04:10 2024
    On 12/2/2024 5:59 PM, Ted Heise wrote:
    On Mon, 2 Dec 2024 17:33:11 -0500,
    bfh <redydog@rye.net> wrote:
    sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
       sticks <wolverine01@charter.net> wrote:

     Looks like you're getting more familiar with the app and
    the batteries. Nice job. It looks like the key to these
    lithium batteries is in actually getting them fully charged.
    At least now you know it does all work, and if needed you
    could always pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts. Always interesting
    and something we all have an interest in either knowing or
    learning about. I was surprised at the off-topic tendency of
    this group when I first came here, and some research showed
    there has been a long history of it here. But most of those
    who read this group probably come here for the RV stuff, I
    know I did.

    Thanks for the kind words, that's really thoughtful. I've been on
    Usenet for three decades, but only came to this newsgroup a few
    years ago--when I started getting serious about a trailer.

    Since I began, Many groups have died, some have moved (at least in
    part) to Facebook, and a few are still active. That last category
    is mostly oldtimers who know each other and hang around as much
    out of habit as anything else. They tend to also have a lot of
    off topic banter, so this group isn't unique in that respect.

    I still think it is the perfect medium for discussions. You don't like someone, you don't have to even see their posts. You get tired of a
    particular thread, you just ignore it. You can read either threaded or unthreaded, with threads either collapsed or expanded. You can easily
    find what interests you and not have to wade through lots of useless
    crap like you do on the web based social networks. I've never been a
    facebook member, and never will be. Usenet works great for me.



    Having a little withdrawal now from the RV scene with the new
    rig sitting about 15 feet away outside the wall of the garage
    and the TOAD setup all ready to go. I had hoped to travel
    this winter some, but it looks like I'll be getting a shoulder
    replacement and just need to get that done.

    Good luck to you..........and make sure the surgeon is not a
    Millennial and the replacement parts are not from China.

    Gotta be frustrating to put the new adventures on hold. I'll add
    my best wishes for a successful outcome!

    Thanks to both of you for the kind words. Unfortunately, this one has
    gone too far and I have to do a reverse shoulder. At this point I don't
    even care. Just gotta move forward.


    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bfh@21:1/5 to sticks on Wed Dec 4 12:31:41 2024
    sticks wrote:
    On 12/2/2024 5:59 PM, Ted Heise wrote:
    On Mon, 2 Dec 2024 17:33:11 -0500,
       bfh <redydog@rye.net> wrote:
      sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
     Â Â  sticks <wolverine01@charter.net> wrote:

     Â Looks like you're getting more familiar with the app and
    the batteries. Nice job.  It looks like the key to these
    lithium batteries is in actually getting them fully charged.
    At least now you know it does all work, and if needed you
    could always pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts.  Always interesting
    and something we all have an interest in either knowing or
    learning about. I was surprised at the off-topic tendency of
    this group when I first came here, and some research showed
    there has been a long history of it here.  But most of those
    who read this group probably come here for the RV stuff, I
    know I did.

    Thanks for the kind words, that's really thoughtful.  I've been on
    Usenet for three decades, but only came to this newsgroup a few
    years ago--when I started getting serious about a trailer.

    Since I began, Many groups have died, some have moved (at least in
    part) to Facebook, and a few are still active.  That last category
    is mostly oldtimers who know each other and hang around as much
    out of habit as anything else.  They tend to also have a lot of
    off topic banter, so this group isn't unique in that respect.

    I still think it is the perfect medium for discussions.  You don't
    like someone, you don't have to even see their posts.  You get tired
    of a particular thread, you just ignore it.  You can read either
    threaded or unthreaded, with threads either collapsed or expanded.
    You can easily find what interests you and not have to wade through
    lots of useless crap like you do on the web based social networks.
    I've never been a facebook member, and never will be.  Usenet works
    great for me.



    Having a little withdrawal now from the RV scene with the new
    rig sitting about 15 feet away outside the wall of the garage
    and the TOAD setup all ready to go.  I had hoped to travel
    this winter some, but it looks like I'll be getting a shoulder
    replacement and just need to get that done.

      Good luck to you..........and make sure the surgeon is not a
      Millennial and the replacement parts are not from China.

    Gotta be frustrating to put the new adventures on hold.  I'll add
    my best wishes for a successful outcome!

    Thanks to both of you for the kind words.  Unfortunately, this one has
    gone too far and I have to do a reverse shoulder.  At this point I
    don't even care.  Just gotta move forward.

    Reverse shoulder. Does that mean you'll be able to scratch your back
    as easily as you could scratch your chest?

    --
    bill
    Theory don't mean squat if it don't work.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From sticks@21:1/5 to bfh on Wed Dec 4 12:16:11 2024
    On 12/4/2024 11:31 AM, bfh wrote:

    Thanks to both of you for the kind words.  Unfortunately, this one has
    gone too far and I have to do a reverse shoulder.  At this point I
    don't even care.  Just gotta move forward.

    Reverse shoulder. Does that mean you'll be able to scratch your back as easily as you could scratch your chest?

    My doctor refers to the traditional as the "young mans shoulder" and I
    was able to do that last year on the right side. He calls a reverse an
    "old mans shoulder."

    If it's your body and you want as close to original function as you had
    before you want the traditional if at all possible. The traditional
    replaces the existing ball on the arm portion of your shoulder with a
    ball and places a cup in the shoulder socket portion just like you have
    now.

    A reverse procedure places the ball portion on the shoulder part and the
    cup on the arm part. The reverse of what you originally had. You get
    less movement, though with some hard work you can get close. The rehab
    is actually much easier doing a reverse, and they don't even care if you
    do rehab. I will do it to get as much motion as possible, but the
    important thing is the pain is gone immediately.

    --
    I Stand With Israel!

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From bfh@21:1/5 to sticks on Wed Dec 4 14:45:11 2024
    sticks wrote:
    On 12/4/2024 11:31 AM, bfh wrote:

    Thanks to both of you for the kind words.  Unfortunately, this one
    has gone too far and I have to do a reverse shoulder.  At this
    point I don't even care.  Just gotta move forward.

    Reverse shoulder. Does that mean you'll be able to scratch your back
    as easily as you could scratch your chest?

    My doctor refers to the traditional as the "young mans shoulder" and I
    was able to do that last year on the right side.  He calls a reverse
    an "old mans shoulder."

    If it's your body and you want as close to original function as you
    had before you want the traditional if at all possible.  The
    traditional replaces the existing ball on the arm portion of your
    shoulder with a ball and places a cup in the shoulder socket portion
    just like you have now.

    A reverse procedure places the ball portion on the shoulder part and
    the cup on the arm part.  The reverse of what you originally had.  You
    get less movement, though with some hard work you can get close.  The
    rehab is actually much easier doing a reverse, and they don't even
    care if you do rehab.  I will do it to get as much motion as possible,
    but the important thing is the pain is gone immediately.

    Sigh. I knew what it was - I asked Google. Have you recently been
    exposed to the democratus bacillus?

    Anyway, good luck again - even if your ball's backwards. Ummm....Does
    it come with a Zerk fitting? Google was mum on that point.

    --
    bill
    Theory don't mean squat if it don't work.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From Ted Heise@21:1/5 to bfh on Thu Dec 5 14:53:12 2024
    On Wed, 4 Dec 2024 12:31:41 -0500,
    bfh <redydog@rye.net> wrote:
    sticks wrote:
    On 12/2/2024 5:59 PM, Ted Heise wrote:
    On Mon, 2 Dec 2024 17:33:11 -0500,
       bfh <redydog@rye.net> wrote:
      sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:

    Thanks for the kind words, that's really thoughtful. I've
    been on Usenet for...

    I still think it is the perfect medium for discussions. You
    don't like someone, you don't have to even see their posts.
    You get tired of a particular thread, you just ignore it.
    You can read either threaded or unthreaded, with threads
    either collapsed or expanded. You can easily find what
    interests you and not have to wade through lots of useless
    crap like you do on the web based social networks. I've never
    been a facebook member, and never will be. Usenet works great
    for me.

    Totally agree, Usenet is a wonderful way to connect with people
    that have similar interests. Too bad it's used by so few these
    days.

    And I'm only on Facebook because my wife (and a few good friends)
    share things there that I want to/should see.


    ...I had hoped to travel this winter some, but it
    looks like I'll be getting a shoulder replacement and just
    need to get that done.

    Good luck to you..........and make sure the surgeon is not a
    Millennial and the replacement parts are not from China.

    Gotta be frustrating to put the new adventures on hold.
    I'll add my best wishes for a successful outcome!

    Thanks to both of you for the kind words. Unfortunately, this
    one has gone too far and I have to do a reverse shoulder. At
    this point I don't even care. Just gotta move forward.

    Reverse shoulder. Does that mean you'll be able to scratch your
    back as easily as you could scratch your chest?

    Or other places that old guys tend to scratch...

    Seriously, thanks for the explanation. I had not looked it up.

    --
    Ted Heise <theise@panix.com> West Lafayette, IN, USA

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)
  • From George.Anthony@21:1/5 to bfh on Fri Dec 6 18:38:30 2024
    bfh <redydog@rye.net> wrote:
    sticks wrote:
    On 12/1/2024 10:42 AM, Ted Heise wrote:
    On Sun, 1 Dec 2024 10:24:27 -0600,
       sticks <wolverine01@charter.net> wrote:


      Looks like you're getting more familiar with the app and the
      batteries. Nice job.  It looks like the key to these lithium
      batteries is in actually getting them fully charged.  At least
      now you know it does all work, and if needed you could always
      pull out the generator if you're freezing.

    Thanks for the support, sticks/wolverine01--much appreciated!

    To be honest, I really like your posts.  Always interesting and
    something we all have an interest in either knowing or learning about.
    I was surprised at the off-topic tendency of this group when I first
    came here, and some research showed there has been a long history of
    it here.  But most of those who read this group probably come here for
    the RV stuff, I know I did.

    Having a little withdrawal now from the RV scene with the new rig
    sitting about 15 feet away outside the wall of the garage and the TOAD
    setup all ready to go.  I had hoped to travel this winter some, but it
    looks like I'll be getting a shoulder replacement and just need to get
    that done.

    Good luck to you..........and make sure the surgeon is not a
    Millennial and the replacement parts are not from China.

    Anything RV related is good to read now.  Keeps me in the
    game.


    Ditto on the good luck. By all means don’t let them give you a Chinesium replacement.

    --- SoupGate-Win32 v1.05
    * Origin: fsxNet Usenet Gateway (21:1/5)