Please watch this video for more information: Typical residential standby generators cannot. As a huge “battery” of sorts, the grid can handle this small amount of backfeed. Any time solar production exceeds loads in the building, solar inverters attempt to send power to the utility grid. If solar inverters “see” voltage from a generator, they will attempt to sync with the generator and backfeed power to it. They must be electrically isolated at all times. The bottom line is you cannot allow solar panels and a generator to work in parallel. There are too many scenarios to explain every one, but this is the most common question we come across. Whether you are installing a new whole-home backup generator with solar panels, or whether you are adding solar panels to a home with a backup generator, this article may apply. We have seen this time and time again, so we wanted to point out a correct way to integrate a grid-interactive solar energy system with a new whole-home generator. Warranties for generators or solar inverters can be voided by failing to take into account important factors. Licensed electricians often don’t realize they are creating a hazardous situation that could severely damage equipment. This article is intended for our colleagues who install whole-home generators in Southwest Florida.
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