We did a Q4 install with SunPower, promised 5-year payback but we’re hitting year 6 due to inverter failures. industrial solar panel upkeep helped with troubleshooting, but those surprise maintenance costs cut into savings. Anyone else seen this drag ROI?

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We did a Q4 install with SunPower, promised 5-year payback but we’re hitting year 6 due to inverter failures. industrial solar panel upkeep helped with troubleshooting, but those surprise maintenance costs cut into savings