There are a handful of companies that let you spec a system online in most of the US, including Solar City (Tesla). Take the specs based on system size and convert into the DIY equipment you can purchase online for you or friends to install. As homes don't care about weight, lead acid batteries seem ideal, but the gas coming off them concentrated in a small area is caustic and will cause harm. A well designed energy storage system from a reputable company is a must. There is an episode of Homestead Helpers/Rescue/Something where that was one of the issues, the battery storage system (lead acid) was making the home unlivable.

On the flip side with the rebates from the government on solar you could probably skip the DIY and have a reputable company secure and install what you want.

Another warning, while Tesla Powerwalls are the gold standard of energy storage and their website is pretty good, securing a system and getting installed may require a VERY long wait. My buddy in FL specced a system and had to bail on it as they couldn't provide an install date after many months. Went with another provider and was relatively straightforward.