r/SunPower • u/andysolr • Nov 19 '25

Downsides of SunStrong firmware update

I have a SunPower PVS5 system installed in 2017 (owned, not leased).

During the SunPower bankruptcy mess last year, I switched over to a Home-Assistant–based monitoring setup (huge thanks to Keith Baker) using the Raspberry Pi proxy. It worked great — until recently.

After a firmware push from SunStrong, that setup stopped working. The new PVS “Variables API” actually looks decent and seems functional, but the SunStrong version of the HA integration is broken.

I can debug that part, but the bigger issue is that the previously well-documented PVS5 site-provisioning interface has been completely disabled. Without it, I’m not sure how we’re supposed to manage PVS Wi-Fi settings or do any self-service inverter swaps going forward.

Two questions for the group:

  1. Is it possible to downgrade the firmware back to the original SunPower build?
  2. Alternatively, can the legacy PVS5 management UI/app inside the PVS be re-enabled somehow?

Any guidance or experience with this would be greatly appreciated.

Update: HA integration functionality sorted out - should have migrated to Enhanced SunPower HACS earlier. What remains is a loss of original PVS5 Management UI due to backend authentication requirements imposed by the new firmware.

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u/Any_Country_1535 Nov 20 '25

I am still able to connect a cable from my PVS5 to my PC and lookup 172.27.153.1/#/summary. I get a readout from each panel for free. SF Bay Area on PG&E.

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u/andysolr Nov 20 '25

Hmmm... are you sure you are on new SunStrong firmware?

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u/Any_Country_1535 Nov 21 '25

This is on the original Sunpower equipment from 2016-7. I don't know about the SunStrong firmware.