[RE-wrenches] Alternate LVD shutdown
Bill Battagin
frenergy at psln.com
Mon Jan 6 21:52:49 PST 2025
Hey Mac,
I've tried to calibrate the voltage displayed on the Mate
with the Fluke on the battery bus bars but it doesn't seem to take after
the adjustment in "calibrate". But The Flexmax 80 does calibrate
perfectly to the actual battery voltage and its in the FM80 aux landing
that I'm using for this go-around to shut down the inverter to save the
batteries.
'Manually' meaning.....?
Thanks,
Bill
Feather River Solar Electric
Bill Battagin, owner
4291 Nelson St. (Shipping)
5575 Genesee Rd. (USPS, UPS)
Taylorsville, CA 95983
530-284-7849, 258-1641(cell)
CA. C10 Lic # 874049
Solar Powered since 1982
Home of the Sunny Side Up
On 1/2/2025 5:53 PM, Mac Lewis via RE-wrenches wrote:
> Hi Bill,
>
> Are all your voltages calibrated? Mate, Flexmax, FM80? Where are you
> reading the voltages?
>
> Does it work OK manually?
>
>
>
> On Thu, Jan 2, 2025 at 12:08 PM Jay via RE-wrenches
> <re-wrenches at lists.re-wrenches.org> wrote:
>
> Simpliphy has a very high voltage LVD.
> And the older OB can’t be programmed to those voltages
>
>
>
>> On Jan 2, 2025, at 10:04 AM, Tyrone Houck via RE-wrenches
>> <re-wrenches at lists.re-wrenches.org> wrote:
>>
>>
>> Forgive my ignorance but why won't the vfx lbco work for lithium?
>>
>>
>>
>> On Thu, Jan 2, 2025, 8:19 AM Bill Battagin via RE-wrenches
>> <re-wrenches at lists.re-wrenches.org> wrote:
>>
>> I am trying to use the "low battery disconnect" in aux mode
>> in a newly
>> installed OB FM80 CC for Li battery low voltage protection. I
>> can't use
>> the 19 year old OB VFX inverters for obvious reasons. The
>> plan is to run
>> the 12 volt output from the aux output to a NC relay to open
>> it at 50
>> VDC of the bank of SimpliPhi 3.8M batteries. 50 VDC is
>> SimpliPhi's
>> recommendation for LVD. The "output" of the relay would be
>> connected to
>> the VFX's ON-OFF landings of that little green terminal
>> block in the AC
>> side of the inverter and just act as a simple switch for the
>> inverter to
>> turn it off to save the batteries.
>>
>> I'm using one of my newer FM80's as a test run
>> and have
>> programmed the voltages in Low Battery Disconnect mode and
>> then put it
>> in auto mode. However, as the CC goes below the voltage set
>> point, the
>> AUX output does not turn on (time set for 5 seconds), as
>> evidence in the
>> CC's home screen and by checking for 12V at the AUX terminal
>> block.
>>
>> Any ideas of what I'm missing here to make this
>> work? I
>> know the other solution, thousands of $$ for new inverters
>> which would
>> be great but these folks have already invested quite a chuck
>> on array
>> replacement and charge controllers.
>>
>> Thanks for any experience with this.
>>
>> Bill
>>
>> Feather River Solar Electric
>> Bill Battagin, owner
>> 4291 Nelson St. (Shipping)
>> 5575 Genesee Rd
>> <https://www.google.com/maps/search/5575+Genesee+Rd?entry=gmail&source=g>.
>> (USPS, UPS)
>> Taylorsville, CA 95983
>> 530-284-7849, 258-1641(cell)
>> CA. C10 Lic # 874049
>> Solar Powered since 1982
>> Home of the Sunny Side Up
>>
>>
>> --
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> Mac Lewis
>
> *
>
> "Yo solo sé que no sé nada." -Sócrates
>
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