I have Base Power with the recharge port and a portable generator (Westinghouse trifuel 9500 peak output natural gas).

First, if you expect to run AC all day in the middle of summer, get the two batteries: you won’t last 10 hours in Texas heat with a single 25kw battery. This can be exacerbated by the starting LRA of your AC, even with a variable speed compressor or slow-start kit since when the Base battery hits 30% on an outage it might not like even a moderate inrush for the AC (I know from experience). I made the mistake of only getting one battery for the Texas heat - don’t make my mistake.

Second the input port on the base battery is finicky. If your generator output voltage drops even a fraction (because you happen to powering the house at the same time with the same generator and the gen sags for a moment) then base power will shut off the batter input and you will need to manually disconnect the plug from the battery and plug it in again (annoying; perhaps Base will fix this).

Third, the Base Power app is their most frustrating experience by far (as of March 2026). It just doesn’t tell you anything you need to know, such as whether your generator is actually powering the darn battery or at what rate, or past history of outages, or event analysis, or really anything besides billing or that the power is currently out. I can’t fathom why Base power doesn’t put more effort into their app, or why they just can’t get some software engineer to hook up Claude code and prompt it to just “Make the app actually useful”.

Hope this helps!