Unfortunately I'm not aware of any other "fixes" outside of replacing the inverters. I know for many that's really not an option due to cost.
I've heard of SS swapping out defective inverters for credits towards the 6000xp, but that seems to be a case by case basis.
This is your ticket to resolving the flicker.
Signature Solar UPGRADE PROGRAM 2024 ✨
Agreed! Sorry, I should have clarified. This is indefinite for original purchase orders before 2024.
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