> They do have models that can function off-grid, and even models with attached batteries to handle surge loads and night-time operation, but these models are n

> They do have models that can function off-grid, and even models with attached batteries to handle surge loads and night-time operation, but these models are not as widely installed. Talking to solar salespeople, they say it's not code to run your house off-grid directly on the panels, without batteries. I'm not sure why; maybe they think handling brownouts is too much of a problem? We're planning to install an SMA inverter [1] that has a "Secure Power Supply" outlet in the basement that gives best-effort power during a grid outage. This seems to be the only option on the market that gives you some power when the grid is out without needing the very large (quoted at $10k for the smallest size) expense of a battery system. [1] https://www.sma-america.com/newsroom/current-news/news-details/news/1316-sma-expands-power-class-of-sunny-boy-tl-us-series-with-secure-power-supply.html https://www.sma-america.com/newsroom/current-news/news-detai...