[RE-wrenches] SunPower SunVault black start

[August Goers]

Hi Bruce - for what it's worth, we're still able to access our systems with
SunPower Pro Fleet Management (https://monitor.sunpower.com/) - I think one
of our logins doesn't work, but others do. Fingers crossed it keeps working.

Best,

August




On Wed, Dec 11, 2024 at 11:08 AM Bruce Erickson via RE-wrenches <
re-wrenches at lists.re-wrenches.org> wrote:

> Recently one of our four now-orphaned SunVault systems failed to back up
> for our customer. On site we found the batteries discharged below cut-in
> voltage for unknown reasons (no more monitoring, no more tech support).
> Even though it had been sunny for a few days the system failed to retain a
> reserve to restart once sun returned. I’m looking for recommendations for
> 48 volt external chargers for this situation. We’re looking at Iota which
> only has a 13 amp charger at 48v but does have a plug-in module for
> controlling LiFePo charging. At 256 amphours of parallel batteries
> hopefully an 8 or 10 hour charge would get us up to cut-in. I’m also not
> sure how the Iota will play with any BMS the SunPower batteries might have.
> Any recommendations for this situation would be much appreciated.
>
> Thanks in advance,
> Bruce
>
> Bruce Erickson
> Mendocino Solar Service
> 707-937-1701
> PO Box 1252
> Mendocino, CA 95460
>
>
>
> "Serving the Solar System"
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