[RE-wrenches] Outback Charge controllers resetting to default settings
Brett Stigile
brett at oregonsunwrangler.com
Sat Jan 10 14:37:19 PST 2026
I just had an FM 60 reset to factory specs. This is on an old lead acid
set up so can't blame lithium. Not online.
---
Brett Stigile
Owner/Renewable Energy Electrician
503-317-7950
brett at oregonsunwrangler.com
Oregon Sun Wrangler LLC
CCB: 240661
License: 66LRT
NABCEP PV Installation Professional
certification: PV 100414-008123
On 2026-01-10 14:02, re-wrenches-request at lists.re-wrenches.org wrote:
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> Today's Topics:
>
> 1. Outback Charge controllers resetting to default settings
> (Zeke Yewdall)
> 2. Re: Outback Charge controllers resetting to default settings
> (Tyrone Houck)
> 3. Re: Battery Sensor Light on VFX3648 (Chris Schaefer)
> 4. Re: Battery Sensor Light on VFX3648 (jay)
> 5. Re: Battery Sensor Light on VFX3648 (Jerry Shafer)
> 6. Re: Battery Sensor Light on VFX3648 (jay)
> 7. Re: Outback Charge controllers resetting to default settings
> (Nick Lucchese)
>
>
> ----------------------------------------------------------------------
>
> Message: 1
> Date: Fri, 9 Jan 2026 14:56:47 -0800
> From: Zeke Yewdall <zeke at darkforestsolar.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: [RE-wrenches] Outback Charge controllers resetting to default
> settings
> Message-ID:
> <CANC8fmR7gbe-bx_+6oPoJutcsf5qs3C1ANenXvuzs+-iLtpHkw at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Has anyone else had issues with outback charge controllers resetting to
> default settings? I just had a FM100 do this (and shut the whole
> system
> down because the default settings were too high of voltage for a 15
> cell
> LFP, so the battery turned itself off for protection). The logs show
> that
> the values were set to 0 from the proper settings, then to the default
> settings from 0, on site. But no one was on site. I changed them back
> remotely via opticsRE, and it logged me as changing them back, as it
> should
> have.
>
> Occasionally in the past I've had similar things happen, and always
> kind of
> chalked it up to the customer perhaps messing with the system, but this
> time I know that no one was there to adjust it locally at the time that
> it
> says it was changed.
>
> I have another site this week that does not have opticsRE, that the
> FM100
> may have reset to default settings as well. Same thing -- lithium
> batteries shutting off from overvoltage all of a sudden. I am still
> investigating that one.
>
> Zeke
>
> --
> Zeke Yewdall
> PV Engineer
> NABCEP #031508-89
> zeke at darkforestsolar.com
> 303-523-3592
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> ------------------------------
>
> Message: 2
> Date: Fri, 9 Jan 2026 15:08:24 -0800
> From: Tyrone Houck <tyronehouck at gmail.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Outback Charge controllers resetting to
> default settings
> Message-ID:
> <CAEqH54=DNxM-buzrijftd+ZpnmkPe_haQy_7539RyxwcFDpSkA at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> I have had that happen before on at least 3 different occasions.
> Specifically with the fm100. Totally random and couldn't come up with
> a
> logical explanation. I just reprogram and roll with it...always seemed
> odd
> though.
>
>
>
>
> On Fri, Jan 9, 2026, 2:58?PM Zeke Yewdall via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Has anyone else had issues with outback charge controllers resetting
>> to
>> default settings? I just had a FM100 do this (and shut the whole
>> system
>> down because the default settings were too high of voltage for a 15
>> cell
>> LFP, so the battery turned itself off for protection). The logs show
>> that
>> the values were set to 0 from the proper settings, then to the default
>> settings from 0, on site. But no one was on site. I changed them
>> back
>> remotely via opticsRE, and it logged me as changing them back, as it
>> should
>> have.
>>
>> Occasionally in the past I've had similar things happen, and always
>> kind
>> of chalked it up to the customer perhaps messing with the system, but
>> this
>> time I know that no one was there to adjust it locally at the time
>> that it
>> says it was changed.
>>
>> I have another site this week that does not have opticsRE, that the
>> FM100
>> may have reset to default settings as well. Same thing -- lithium
>> batteries shutting off from overvoltage all of a sudden. I am still
>> investigating that one.
>>
>> Zeke
>>
>> --
>> Zeke Yewdall
>> PV Engineer
>> NABCEP #031508-89
>> zeke at darkforestsolar.com
>> 303-523-3592
>> _______________________________________________
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> ------------------------------
>
> Message: 3
> Date: Fri, 9 Jan 2026 18:35:43 -0500
> From: Chris Schaefer <chris at solarandwindfx.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Battery Sensor Light on VFX3648
> Message-ID:
> <CAFOvL0bmR2XwOiwvw9AySHTd8PXEhpc6rMm5LhYgaXd0LZBi5Q at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> While on the subject of VFX inverters in regards to the fan and
> internal
> temp sensors, I've got a client with a circa 2010 VFX3624 that appears
> to
> have a failed fan. I don't normally deal with 24 volt inverters. I've
> got
> many dead VFX3648 units hanging out. My question is can I cannibalize a
> fan
> out of a 48 volt unit and put it in a 24 volt unit? Next, let's say the
> fan
> is ok and based on the readings above I should look into replacing the
> xfmr
> temp sensor. Again, can I take one out of a 48v inverter and use it on
> a
> 24v unit? Which board might be suspect as well that the xfmr temp
> sensor
> feeds its information too?
>
> Thanks,
> Christopher
>
> On Thu, Jan 8, 2026 at 9:23?PM Jerry Shafer via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Wrenches, Jay,
>> Transformer temp sensors in the FX Fails, fans fail causing fet boards
>> to
>> overheat, dirty filters cause high temps on all the intervals. When
>> outback
>> was still running the parts department you always got temp senders
>> with
>> fans, boards and a relocation procedure, yes you must put the sensor
>> in a
>> new location.
>> FunTimes
>>
>> On Thu, Jan 8, 2026, 3:26?PM Jay via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> I?ve replaced dozens of internal temp sensors over the years.
>>>
>>> I learned to also replace the fan at the same time.
>>>
>>> Or vice versa.
>>>
>>> Jay
>>>
>>> On Jan 8, 2026, at 4:01?PM, Luke Christy via RE-wrenches <
>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>> ?Drake,
>>> I agree with Ray,
>>> The message you?re seeing does not refer to the RTS that has been
>>> absent
>>> for years- it?s an issue with an internal sensor.
>>> I have seen intermittent warnings relating to internal sensors on VFX
>>> units that have self-resolved with a reboot, but if the warning is
>>> persistent then you?ll likely need to open the unit up and replace
>>> the
>>> sensor.
>>>
>>> Luke Christy
>>> Renewable energy consultant
>>>
>>> NABCEP Certified PV Installation Professional?:
>>>
>>> Solar Gain Services, LLC
>>> PO Box 531
>>> Monte Vista, CO 81144
>>> 719.588.3044
>>> sgsrenewables at gmail.com
>>>
>>> On Jan 8, 2026, at 3:00?PM, Drake Chamberlin via RE-wrenches <
>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>> A couple of years back, a client changed from lead acid batteries to
>>> LiFeBlue, lithium batteries. At that time the temperature sensor was
>>> removed.
>>>
>>> The other day, a warning light started blinking. The warning turned
>>> out
>>> to be a bad temperature sensor. It is strange that this message
>>> showed up
>>> now, as the sensor has been gone for years.
>>>
>>> Is there any way to turn off the warning light?
>>>
>>> Thank you,
>>>
>>> Drake
>>>
>>>
>>> *Drake Chamberlin*
>>>
>>> *Athens Electric LLC*
>>>
>>> *Ohio Electrical Contractor?s License 44810*
>>>
>>> *NABCEP Certified PV Installation Professional*
>>>
>>>
>>> --
>>>
>>> _______________________________________________
>>> List sponsored by Redwood Alliance
>>>
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>>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
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>
> --
>
> Chris Schaefer?s
>
>
> *Tel 585-229-2083 or Cell 585-748-1870 *
> *5115 S Hill Road ~ Canandaigua New York 14424**www.solarandwindfx.com
> <http://www.solarandwindfx.com> ~ E-mail: chris at solarandwindfx.com
> <chris at solarandwindfx.com>*
>
>
> Thomas Jefferson, the author of our great Constitution, once said,
> "democracy" will cease to exist when you take away from those who are
> willing to work and give to those who would not."
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> ------------------------------
>
> Message: 4
> Date: Fri, 9 Jan 2026 16:51:02 -0700
> From: jay <jay.peltz at gmail.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Battery Sensor Light on VFX3648
> Message-ID: <C035C05F-5E59-4811-821E-06422162F449 at gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> HI Chris,
>
> They are all 12v fans and universal between 12,24,48v units
>
> jay
>
>> On Jan 9, 2026, at 4:35?PM, Chris Schaefer via RE-wrenches
>> <re-wrenches at lists.re-wrenches.org> wrote:
>>
>> While on the subject of VFX inverters in regards to the fan and
>> internal temp sensors, I've got a client with a circa 2010 VFX3624
>> that appears to have a failed fan. I don't normally deal with 24 volt
>> inverters. I've got many dead VFX3648 units hanging out. My question
>> is can I cannibalize a fan out of a 48 volt unit and put it in a 24
>> volt unit? Next, let's say the fan is ok and based on the readings
>> above I should look into replacing the xfmr temp sensor. Again, can I
>> take one out of a 48v inverter and use it on a 24v unit? Which board
>> might be suspect as well that the xfmr temp sensor feeds its
>> information too?
>>
>> Thanks,
>> Christopher
>>
>> On Thu, Jan 8, 2026 at 9:23?PM Jerry Shafer via RE-wrenches
>> <re-wrenches at lists.re-wrenches.org
>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>> Wrenches, Jay,
>>> Transformer temp sensors in the FX Fails, fans fail causing fet
>>> boards to overheat, dirty filters cause high temps on all the
>>> intervals. When outback was still running the parts department you
>>> always got temp senders with fans, boards and a relocation procedure,
>>> yes you must put the sensor in a new location.
>>> FunTimes
>>>
>>> On Thu, Jan 8, 2026, 3:26?PM Jay via RE-wrenches
>>> <re-wrenches at lists.re-wrenches.org
>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>> I?ve replaced dozens of internal temp sensors over the years.
>>>>
>>>> I learned to also replace the fan at the same time.
>>>>
>>>> Or vice versa.
>>>>
>>>> Jay
>>>>
>>>>> On Jan 8, 2026, at 4:01?PM, Luke Christy via RE-wrenches
>>>>> <re-wrenches at lists.re-wrenches.org
>>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>>
>>>>> ?Drake,
>>>>> I agree with Ray,
>>>>> The message you?re seeing does not refer to the RTS that has been
>>>>> absent for years- it?s an issue with an internal sensor.
>>>>> I have seen intermittent warnings relating to internal sensors on
>>>>> VFX units that have self-resolved with a reboot, but if the warning
>>>>> is persistent then you?ll likely need to open the unit up and
>>>>> replace the sensor.
>>>>>
>>>>> Luke Christy
>>>>> Renewable energy consultant
>>>>>
>>>>> NABCEP Certified PV Installation Professional?:
>>>>>
>>>>> Solar Gain Services, LLC
>>>>> PO Box 531
>>>>> Monte Vista, CO 81144
>>>>> 719.588.3044
>>>>> sgsrenewables at gmail.com <mailto:sgsrenewables at gmail.com>
>>>>>
>>>>>> On Jan 8, 2026, at 3:00?PM, Drake Chamberlin via RE-wrenches
>>>>>> <re-wrenches at lists.re-wrenches.org
>>>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>>>
>>>>>> A couple of years back, a client changed from lead acid batteries
>>>>>> to LiFeBlue, lithium batteries. At that time the temperature
>>>>>> sensor was removed.
>>>>>>
>>>>>> The other day, a warning light started blinking. The warning
>>>>>> turned out to be a bad temperature sensor. It is strange that this
>>>>>> message showed up now, as the sensor has been gone for years.
>>>>>>
>>>>>> Is there any way to turn off the warning light?
>>>>>>
>>>>>> Thank you,
>>>>>>
>>>>>> Drake
>>>>>>
>>>>>> Drake Chamberlin
>>>>>>
>>>>>> Athens Electric LLC
>>>>>>
>>>>>> Ohio Electrical Contractor?s License 44810
>>>>>>
>>>>>> NABCEP Certified PV Installation Professional
>>>>>>
>>>>>>
>>>>>>
>>>>>> --
>>>>>>
>>>>>> _______________________________________________
>>>>>> List sponsored by Redwood Alliance
>>>>>>
>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>> <http://re-wrenches.org/>
>>>>>>
>>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>>>
>>>>>> Change listserver email address & settings:
>>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>>>
>>>>>> There are two list archives for searching. When one doesn't work,
>>>>>> try the other:
>>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>>>
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>>>>>>
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>>>>>>
>>>>>
>>>>> _______________________________________________
>>>>> List sponsored by Redwood Alliance
>>>>>
>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>> <http://re-wrenches.org/>
>>>>>
>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>>
>>>>> Change listserver email address & settings:
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>>>>>
>>>>> There are two list archives for searching. When one doesn't work,
>>>>> try the other:
>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>>
>>>>> List rules & etiquette:
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>>>>> <http://www.members.re-wrenches.org/>
>>>>>
>>>> _______________________________________________
>>>> List sponsored by Redwood Alliance
>>>>
>>>> Pay optional member dues here: http://re-wrenches.org
>>>> <http://re-wrenches.org/>
>>>>
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>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>
>>>> Change listserver email address & settings:
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>>>>
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>>>> try the other:
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>>>>
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>>>> http://www.members.re-wrenches.org
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>>>>
>>> _______________________________________________
>>> List sponsored by Redwood Alliance
>>>
>>> Pay optional member dues here: http://re-wrenches.org
>>> <http://re-wrenches.org/>
>>>
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>>
>>
>>
>> --
>> Chris Schaefer?s
>>
>> Tel 585-229-2083 or Cell 585-748-1870
>> 5115 S Hill Road ~ Canandaigua New York 14424
>> www.solarandwindfx.com <http://www.solarandwindfx.com/> ~ E-mail:
>> chris at solarandwindfx.com <mailto:chris at solarandwindfx.com>
>>
>> Thomas Jefferson, the author of our great Constitution, once said,
>> "democracy" will cease to exist when you take away from those who are
>> willing to work and give to those who would not."
>>
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> Pay optional member dues here: http://re-wrenches.org
>>
>> List Address: RE-wrenches at lists.re-wrenches.org
>>
>> Change listserver email address & settings:
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> ------------------------------
>
> Message: 5
> Date: Fri, 9 Jan 2026 15:56:22 -0800
> From: Jerry Shafer <jerrysgarage01 at gmail.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Battery Sensor Light on VFX3648
> Message-ID:
> <CAMUFgmUx+5u1YRnzJY1p1HWrX0djdHwEZY+=BJLQueMqoHPK-Q at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Wrenches. Jay
> As l recall all the fans are the same PN same with the sensors. Just
> relocate the temp sender to the new location as l recall it is on top
> of
> the xfmr.
> Fun times
>
>
> On Fri, Jan 9, 2026, 3:52?PM jay via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> HI Chris,
>>
>> They are all 12v fans and universal between 12,24,48v units
>>
>> jay
>>
>> On Jan 9, 2026, at 4:35?PM, Chris Schaefer via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>> While on the subject of VFX inverters in regards to the fan and
>> internal
>> temp sensors, I've got a client with a circa 2010 VFX3624 that appears
>> to
>> have a failed fan. I don't normally deal with 24 volt inverters. I've
>> got
>> many dead VFX3648 units hanging out. My question is can I cannibalize
>> a fan
>> out of a 48 volt unit and put it in a 24 volt unit? Next, let's say
>> the fan
>> is ok and based on the readings above I should look into replacing the
>> xfmr
>> temp sensor. Again, can I take one out of a 48v inverter and use it on
>> a
>> 24v unit? Which board might be suspect as well that the xfmr temp
>> sensor
>> feeds its information too?
>>
>> Thanks,
>> Christopher
>>
>> On Thu, Jan 8, 2026 at 9:23?PM Jerry Shafer via RE-wrenches <
>> re-wrenches at lists.re-wrenches.org> wrote:
>>
>>> Wrenches, Jay,
>>> Transformer temp sensors in the FX Fails, fans fail causing fet
>>> boards to
>>> overheat, dirty filters cause high temps on all the intervals. When
>>> outback
>>> was still running the parts department you always got temp senders
>>> with
>>> fans, boards and a relocation procedure, yes you must put the sensor
>>> in a
>>> new location.
>>> FunTimes
>>>
>>> On Thu, Jan 8, 2026, 3:26?PM Jay via RE-wrenches <
>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>
>>>> I?ve replaced dozens of internal temp sensors over the years.
>>>>
>>>> I learned to also replace the fan at the same time.
>>>>
>>>> Or vice versa.
>>>>
>>>> Jay
>>>>
>>>> On Jan 8, 2026, at 4:01?PM, Luke Christy via RE-wrenches <
>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>
>>>> ?Drake,
>>>> I agree with Ray,
>>>> The message you?re seeing does not refer to the RTS that has been
>>>> absent
>>>> for years- it?s an issue with an internal sensor.
>>>> I have seen intermittent warnings relating to internal sensors on
>>>> VFX
>>>> units that have self-resolved with a reboot, but if the warning is
>>>> persistent then you?ll likely need to open the unit up and replace
>>>> the
>>>> sensor.
>>>>
>>>> Luke Christy
>>>> Renewable energy consultant
>>>>
>>>> NABCEP Certified PV Installation Professional?:
>>>>
>>>> Solar Gain Services, LLC
>>>> PO Box 531
>>>> Monte Vista, CO 81144
>>>> 719.588.3044
>>>> sgsrenewables at gmail.com
>>>>
>>>> On Jan 8, 2026, at 3:00?PM, Drake Chamberlin via RE-wrenches <
>>>> re-wrenches at lists.re-wrenches.org> wrote:
>>>>
>>>> A couple of years back, a client changed from lead acid batteries to
>>>> LiFeBlue, lithium batteries. At that time the temperature sensor was
>>>> removed.
>>>>
>>>> The other day, a warning light started blinking. The warning turned
>>>> out
>>>> to be a bad temperature sensor. It is strange that this message
>>>> showed up
>>>> now, as the sensor has been gone for years.
>>>>
>>>> Is there any way to turn off the warning light?
>>>>
>>>> Thank you,
>>>>
>>>> Drake
>>>>
>>>>
>>>> *Drake Chamberlin*
>>>>
>>>> *Athens Electric LLC*
>>>>
>>>> *Ohio Electrical Contractor?s License 44810*
>>>>
>>>> *NABCEP Certified PV Installation Professional*
>>>>
>>>>
>>>> --
>>>>
>>>> _______________________________________________
>>>> List sponsored by Redwood Alliance
>>>>
>>>> Pay optional member dues here: http://re-wrenches.org
>>>>
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>>>>
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>>>> _______________________________________________
>>> List sponsored by Redwood Alliance
>>>
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>>
>> --
>>
>> Chris Schaefer?s
>>
>>
>> *Tel 585-229-2083 or Cell 585-748-1870 *
>> *5115 S Hill Road ~ Canandaigua New York 14424
>> <https://www.google.com/maps/search/5115%0D%0AS+Hill+Road+~+Canandaigua+New+York+14424?entry=gmail&source=g>**www.solarandwindfx.com
>> <http://www.solarandwindfx.com/> ~ E-mail: chris at solarandwindfx.com
>> <chris at solarandwindfx.com>*
>>
>>
>> Thomas Jefferson, the author of our great Constitution, once said,
>> "democracy" will cease to exist when you take away from those who are
>> willing to work and give to those who would not."
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
>> Pay optional member dues here: http://re-wrenches.org
>>
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>>
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> ------------------------------
>
> Message: 6
> Date: Fri, 9 Jan 2026 17:06:33 -0700
> From: jay <jay.peltz at gmail.com>
> To: Jerry Shafer <jerrysgarage01 at gmail.com>
> Cc: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Battery Sensor Light on VFX3648
> Message-ID: <DCA82834-6D3D-417F-84C2-94240E7ABDE0 at gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> It?s been a lot of years since replaced one, but from memory, the early
> FX had the temp sensor plugged into the board.
>
> Later models, I don?t know when it started had the temp sensor attached
> to the transformer with tape but it still attaches to the same plug on
> the board.
>
> The replacement temp sensors attach to the transformer and include the
> high temp tape to attach to the transformer.
>
> it takes all of about 2 minutes to do, once you have the top taken off
> the inverter.
>
> Since the cost of the site visit and time to remove the inverter to
> replace the $20 temp sensor is high, i also replace the fan as its also
> inexpensive but the service call is expensive for the client
>
>
> I presume that Zonna has the temp sensors and maybe fans again.
>
> Jay
>
>
>
>> On Jan 9, 2026, at 4:56?PM, Jerry Shafer <jerrysgarage01 at gmail.com>
>> wrote:
>>
>> Wrenches. Jay
>> As l recall all the fans are the same PN same with the sensors. Just
>> relocate the temp sender to the new location as l recall it is on top
>> of the xfmr.
>> Fun times
>>
>>
>> On Fri, Jan 9, 2026, 3:52?PM jay via RE-wrenches
>> <re-wrenches at lists.re-wrenches.org
>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>> HI Chris,
>>>
>>> They are all 12v fans and universal between 12,24,48v units
>>>
>>> jay
>>>
>>>> On Jan 9, 2026, at 4:35?PM, Chris Schaefer via RE-wrenches
>>>> <re-wrenches at lists.re-wrenches.org
>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>
>>>> While on the subject of VFX inverters in regards to the fan and
>>>> internal temp sensors, I've got a client with a circa 2010 VFX3624
>>>> that appears to have a failed fan. I don't normally deal with 24
>>>> volt inverters. I've got many dead VFX3648 units hanging out. My
>>>> question is can I cannibalize a fan out of a 48 volt unit and put it
>>>> in a 24 volt unit? Next, let's say the fan is ok and based on the
>>>> readings above I should look into replacing the xfmr temp sensor.
>>>> Again, can I take one out of a 48v inverter and use it on a 24v
>>>> unit? Which board might be suspect as well that the xfmr temp sensor
>>>> feeds its information too?
>>>>
>>>> Thanks,
>>>> Christopher
>>>>
>>>> On Thu, Jan 8, 2026 at 9:23?PM Jerry Shafer via RE-wrenches
>>>> <re-wrenches at lists.re-wrenches.org
>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>> Wrenches, Jay,
>>>>> Transformer temp sensors in the FX Fails, fans fail causing fet
>>>>> boards to overheat, dirty filters cause high temps on all the
>>>>> intervals. When outback was still running the parts department you
>>>>> always got temp senders with fans, boards and a relocation
>>>>> procedure, yes you must put the sensor in a new location.
>>>>> FunTimes
>>>>>
>>>>> On Thu, Jan 8, 2026, 3:26?PM Jay via RE-wrenches
>>>>> <re-wrenches at lists.re-wrenches.org
>>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>>> I?ve replaced dozens of internal temp sensors over the years.
>>>>>>
>>>>>> I learned to also replace the fan at the same time.
>>>>>>
>>>>>> Or vice versa.
>>>>>>
>>>>>> Jay
>>>>>>
>>>>>>> On Jan 8, 2026, at 4:01?PM, Luke Christy via RE-wrenches
>>>>>>> <re-wrenches at lists.re-wrenches.org
>>>>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>>>>
>>>>>>> ?Drake,
>>>>>>> I agree with Ray,
>>>>>>> The message you?re seeing does not refer to the RTS that has been
>>>>>>> absent for years- it?s an issue with an internal sensor.
>>>>>>> I have seen intermittent warnings relating to internal sensors on
>>>>>>> VFX units that have self-resolved with a reboot, but if the
>>>>>>> warning is persistent then you?ll likely need to open the unit up
>>>>>>> and replace the sensor.
>>>>>>>
>>>>>>> Luke Christy
>>>>>>> Renewable energy consultant
>>>>>>>
>>>>>>> NABCEP Certified PV Installation Professional?:
>>>>>>>
>>>>>>> Solar Gain Services, LLC
>>>>>>> PO Box 531
>>>>>>> Monte Vista, CO 81144
>>>>>>> 719.588.3044
>>>>>>> sgsrenewables at gmail.com <mailto:sgsrenewables at gmail.com>
>>>>>>>
>>>>>>>> On Jan 8, 2026, at 3:00?PM, Drake Chamberlin via RE-wrenches
>>>>>>>> <re-wrenches at lists.re-wrenches.org
>>>>>>>> <mailto:re-wrenches at lists.re-wrenches.org>> wrote:
>>>>>>>>
>>>>>>>> A couple of years back, a client changed from lead acid
>>>>>>>> batteries to LiFeBlue, lithium batteries. At that time the
>>>>>>>> temperature sensor was removed.
>>>>>>>>
>>>>>>>> The other day, a warning light started blinking. The warning
>>>>>>>> turned out to be a bad temperature sensor. It is strange that
>>>>>>>> this message showed up now, as the sensor has been gone for
>>>>>>>> years.
>>>>>>>>
>>>>>>>> Is there any way to turn off the warning light?
>>>>>>>>
>>>>>>>> Thank you,
>>>>>>>>
>>>>>>>> Drake
>>>>>>>>
>>>>>>>> Drake Chamberlin
>>>>>>>>
>>>>>>>> Athens Electric LLC
>>>>>>>>
>>>>>>>> Ohio Electrical Contractor?s License 44810
>>>>>>>>
>>>>>>>> NABCEP Certified PV Installation Professional
>>>>>>>>
>>>>>>>>
>>>>>>>>
>>>>>>>> --
>>>>>>>>
>>>>>>>> _______________________________________________
>>>>>>>> List sponsored by Redwood Alliance
>>>>>>>>
>>>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>>>> <http://re-wrenches.org/>
>>>>>>>>
>>>>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>>>>>
>>>>>>>> Change listserver email address & settings:
>>>>>>>> http://lists.re-wrenches.org/options.cgi/re-wrenches-re-wrenches.org
>>>>>>>>
>>>>>>>> There are two list archives for searching. When one doesn't
>>>>>>>> work, try the other:
>>>>>>>> https://www.mail-archive.com/re-wrenches@lists.re-wrenches.org/
>>>>>>>> http://lists.re-wrenches.org/pipermail/re-wrenches-re-wrenches.org
>>>>>>>>
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>>>>>>>>
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>>>>>>>> <http://www.members.re-wrenches.org/>
>>>>>>>>
>>>>>>>
>>>>>>> _______________________________________________
>>>>>>> List sponsored by Redwood Alliance
>>>>>>>
>>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>>> <http://re-wrenches.org/>
>>>>>>>
>>>>>>> List Address: RE-wrenches at lists.re-wrenches.org
>>>>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>>>>
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>>>>>>>
>>>>>>> There are two list archives for searching. When one doesn't work,
>>>>>>> try the other:
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>>>>>>>
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>>>>>>>
>>>>>> _______________________________________________
>>>>>> List sponsored by Redwood Alliance
>>>>>>
>>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>>> <http://re-wrenches.org/>
>>>>>>
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>>>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>>>
>>>>>> Change listserver email address & settings:
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>>>>>>
>>>>>> There are two list archives for searching. When one doesn't work,
>>>>>> try the other:
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>>>>>>
>>>>>> List rules & etiquette:
>>>>>> http://www.re-wrenches.org/etiquette.htm
>>>>>>
>>>>>> Check out or update participant bios:
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>>>>>> <http://www.members.re-wrenches.org/>
>>>>>>
>>>>> _______________________________________________
>>>>> List sponsored by Redwood Alliance
>>>>>
>>>>> Pay optional member dues here: http://re-wrenches.org
>>>>> <http://re-wrenches.org/>
>>>>>
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>>>>>
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>>>>>
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>>>>> <http://www.members.re-wrenches.org/>
>>>>>
>>>>
>>>>
>>>>
>>>> --
>>>> Chris Schaefer?s
>>>>
>>>> Tel 585-229-2083 or Cell 585-748-1870
>>>> 5115 S Hill Road ~ Canandaigua New York 14424
>>>> <https://www.google.com/maps/search/5115%0D%0AS+Hill+Road+~+Canandaigua+New+York+14424?entry=gmail&source=g>
>>>> www.solarandwindfx.com <http://www.solarandwindfx.com/> ~ E-mail:
>>>> chris at solarandwindfx.com <mailto:chris at solarandwindfx.com>
>>>>
>>>> Thomas Jefferson, the author of our great Constitution, once said,
>>>> "democracy" will cease to exist when you take away from those who
>>>> are willing to work and give to those who would not."
>>>>
>>>> _______________________________________________
>>>> List sponsored by Redwood Alliance
>>>>
>>>> Pay optional member dues here: http://re-wrenches.org
>>>> <http://re-wrenches.org/>
>>>>
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>>>> <mailto:RE-wrenches at lists.re-wrenches.org>
>>>>
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>>>
>>> _______________________________________________
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> ------------------------------
>
> Message: 7
> Date: Sat, 10 Jan 2026 11:17:41 -0800
> From: Nick Lucchese <lucchesesolar at gmail.com>
> To: RE-wrenches <re-wrenches at lists.re-wrenches.org>
> Subject: Re: [RE-wrenches] Outback Charge controllers resetting to
> default settings
> Message-ID:
> <CAAWRu5iD54e+f4RJR3gtPoKdU22LXEqrqqp5F-Hr7_dthQwD0g at mail.gmail.com>
> Content-Type: text/plain; charset="utf-8"
>
> Yes, it keeps happening to me as well. At least 8 times now. The first
> couple times I blamed myself and thought I had made the rookie default
> settings mistake I see on other's sites but now I know better. Only the
> FM100. Just got back from a site that resulted in the client's Radian
> shutting down due to battery volt sense faults from it. First time it
> has
> caused shutdowns though. Looks like her Blue Ions had been sitting at
> 57.6
> for months now. Unfortunately she has Hughesnet that almost never works
> with Opticsre otherwise I would have caught it. Extremely frustrating,
> I've
> easily eaten enough service calls and equipment failures for Outback
> over
> the years that I could have paid off a Toyota Yaris. No exaggeration.
>
> Nick
>
> On Fri, Jan 9, 2026 at 2:58?PM Zeke Yewdall via RE-wrenches <
> re-wrenches at lists.re-wrenches.org> wrote:
>
>> Has anyone else had issues with outback charge controllers resetting
>> to
>> default settings? I just had a FM100 do this (and shut the whole
>> system
>> down because the default settings were too high of voltage for a 15
>> cell
>> LFP, so the battery turned itself off for protection). The logs show
>> that
>> the values were set to 0 from the proper settings, then to the default
>> settings from 0, on site. But no one was on site. I changed them
>> back
>> remotely via opticsRE, and it logged me as changing them back, as it
>> should
>> have.
>>
>> Occasionally in the past I've had similar things happen, and always
>> kind
>> of chalked it up to the customer perhaps messing with the system, but
>> this
>> time I know that no one was there to adjust it locally at the time
>> that it
>> says it was changed.
>>
>> I have another site this week that does not have opticsRE, that the
>> FM100
>> may have reset to default settings as well. Same thing -- lithium
>> batteries shutting off from overvoltage all of a sudden. I am still
>> investigating that one.
>>
>> Zeke
>>
>> --
>> Zeke Yewdall
>> PV Engineer
>> NABCEP #031508-89
>> zeke at darkforestsolar.com
>> 303-523-3592
>> _______________________________________________
>> List sponsored by Redwood Alliance
>>
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>>
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>> other:
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