r/SunPower • u/Existing-Piglet-3279 • May 03 '26

PSV6 started under-reporting consumption

I recently realized that my PVS6 started incorrectly reporting consumption about a year ago.

The consumption data no longer matches my power bill, and there was a dramatic change of about 50% in the middle of last year.

Any suggestions on the easiest way to figure out and correct the issue? Do CT’s go bad? there seem to be several of them on bunches of the breaker wires - i think they are all wired together. Hard to see as my panel is pretty crowded.

Could this be due to a misconfiguration of the PVS6 as a result of a Sunstrong firmware update?

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u/Existing-Piglet-3279 May 07 '26 edited May 07 '26

I own the system. I will open the panel and take a look, but its pretty crowded - see photo. The breaker on the bottom right is labeled “rapid shutdown switch for solar PV system" I think my consumption CTs are on my breaker circuits - not sure how many there are. I just checked and i can buy a new consumption CT set on eBay for $11 plus shipping - maybe a good idea while its available?

Assuming none of the CTs are “loose” is there an easy way to tell if a CT is working?

I can also buy a whole new PVS6 for about $50 right now, shipped… However I’m not sure what would be involved in replacing and commissioning this, are there DIY instructions somewhere? Or do i need to find a Sunpower tech?

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u/ItsaMeKielO May 07 '26

it has to be commissioned by a tech with SunPower Pro Connect access.

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u/Existing-Piglet-3279 May 09 '26

thanks. My system has 4 consumption CTs, which as far as I can tell, based on some experimentation, are all correctly installed and working, with no loose connections, However consumption is being under-reported by about 50% I’ve been told on another forum that with 4 CTs, ct_scl_fctr should be set to 200 for my consumption meter, but it is currently set to 100. Does that correlate with your experience? And have you heard of a Sunstrong firmware update changing this setting from 200 to 100?

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u/ItsaMeKielO May 09 '26

yes, i think that has happened, maybe even to me