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Is my solar still working?

Your installer went out of business. The panels are still on the roof and the loan is still due. This tool compares what your system has actually produced with what a system like yours should have produced at your address, and gives you one plain answer.

ZIP code Used only to look up typical sunlight for your area.

System size, kW On your contract, permit, or utility interconnection letter. Or count panels and multiply by 0.4.

Install date The month is close enough. Use the first of the month if you're not sure.

Lifetime production, kWh The "lifetime" or "total energy" number on your inverter's screen, or in the old monitoring app if it still opens. Where to find it, by brand.

Roof details, optional

Roof pitch, degrees

Direction panels face, degrees South is 180. West is 270. East is 90.

Email, to save your result We'll send the result and a reminder in a year to check again. Nothing else. No list is sold, ever.

Your result

of expected

Your system has produced
A system like yours should have produced
Time in service
Weather station used

How this was calculated

Expected production comes from PVWatts, the federal solar model from the National Laboratory of the Rockies (formerly NREL), using typical-year weather for your area, your system size, and a fixed roof mount at the pitch and direction given. It's summed month by month from your install date to today, with a small allowance for normal panel aging. Your actual number comes from you. The comparison is only as good as those inputs.

Thresholds: 85 percent or above reads as normal, because weather, shade, and dust easily account for that much. Between 65 and 85 percent is worth a look. Below 65 percent, something is usually wrong.

This is a production comparison, not an inspection. It cannot detect electrical faults, wiring damage, or safety problems, and a "normal" result does not mean the system is safe. If you smell burning, see scorch marks, or hear buzzing at the inverter, turn the system off at the disconnect and call a licensed electrician.

What happens after the check

If it's normal: you're fine for now. Save the result. We'll nudge you in a year to check again.
If it's worth a look: read the guide for your inverter brand. Most of these are a tripped breaker, a dead monitoring gateway, or one bad panel.
If it's likely a problem: you'll want a licensed solar technician. We can send your result to one vetted repair company in your area, only if you ask us to, and we tell you who it is first.