Comment Re:That's Nifty, but consumer? (Score 1) 113
Most states and towns in the USA do not have building codes for residential off-grid battery storage.
I thought that was in the National Electrical Code (NEC) section on solar, at least if they're on the 2017 version (or some earlier versions). Most jurisdictions adopt some version of the NEC (and occasionally move to a later version - my county is on 2017 as of a year or so ago) and then maybe add a few changes, rather than write their own electrical code.
Main remaining downsides, if you want to keep your fire insurance, are finding listed (by an NRTL such as UL) systems (there are a few, even some that are rated for elevations over 1,500 meters - about 79 feet short of 5,000) and that the code now requires a cert for solar systems installers, so if you want to install it all yourself you have to drop a couple hunderd bux on a short online course or hire a pro to make the major connections and maybe do some of the design for your install.