Browse all Generac solar inverter models. 1 inverters available.
Generac is best known for the backup generator humming beside many American houses. Robert Kern founded the company in 1959 in Wisconsin, and in 1989 it introduced the first gaseous-fueled automatic home standby generator. Generac Holdings is headquartered in Waukesha, Wisconsin and has traded on the New York Stock Exchange as GNRC since February 2010.
Solar and storage are a newer part of the business. In July 2021 Generac acquired Chilicon Power, a designer of grid-interactive microinverters and monitoring software, and turned its technology into the PWRmicro line, which sits alongside the PWRcell home battery system.
The first PWRmicro models came to market in 2022, including a dual-module 2:1 unit and a single-module 1:1 unit. In September 2025 Generac launched the PWRmicro PM-820, a dual-input microinverter with 820 W of AC output, which is the model listed here. One unit serves two panels, each on its own input with its own power point tracking, and the cabling uses a modular bus with integrated grounding to speed up installation.
The appeal of PWRmicro is one brand for the whole backup chain. It works with the PWRcell 2 battery and with Generac standby generators, and Generac said it would bring PWRmicro and PWRcell into the ecobee app from late 2025. The PM-820 is backed by a 25-year warranty.
The solar line is built around Generac’s US home-backup ecosystem. Outside North America, where its generators and batteries are rarely sold, PWRmicro is an unusual choice, so check local support first.
With microinverters there is no string to size; instead, each panel has to fit one input. The PM-820 accepts up to 70 V per input and tracks between 24 and 65 V, a wide range that fits common residential panels, including 144-cell models whose open-circuit voltage is close to 50 V and rises further on a cold morning.
Each input takes up to 18 A, enough for large-format panels with 182 mm or 210 mm cells. Power is the number to watch: 820 W shared between two panels means about 410 W each, so a pair of 450 W panels will be capped for a few hours around midday. The string calculator checks your panel against the microinverter’s input limits.