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Monitoring Or Inverter Problem
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If production is lower than expected for the season, start with your monitoring app, then call a pro certified by your equipment maker. Do not open the equipment yourself.
Winter output is lower, so a seasonal dip is normal. A sudden drop is different. EnergySage calls inverters commonly the real suspects when a system has trouble (EnergySage on solar panel repair). Many monitoring apps can also send an alert when the system is not performing as expected.
Write down what you see: the date it started, any error code on the inverter or in the app, and a screenshot of recent production. Photos help whoever comes out.
EnergySage advises contacting a professional certified by your manufacturer to troubleshoot, and warns that tampering with solar equipment can be dangerous and may void your warranty.
Check your inverter warranty too. String inverters often carry about 10 to 12 years, and microinverters and power optimizers often carry 25. Many manufacturers do not pay for labor, and some require a certified installer to diagnose first (EnergySage on inverter warranties).
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