Batteries home building --maybe

yes i am cheap and mean --i would like to go solar panel ---go off grid --keep all my excess electricity for my own use--not interested in the buy it from me or credit  my bill plan ---should mention i am also very dis-trustful--so onto building my own large batteries has always been my holy grail---i do realize my almost total lack of how its done and all the other back ground to it---disclaimer statement over and out the way-- used to /still do   enjoy -watching   Dr Robert Murray Smith  and his shows--- very sadly though he passed away last year--   a large mine of info still available---he was wacky and a few miles of understanding --above my head. But recently found another "mad scientist " to follow and enjoy his postings--- a young man named Robert Karas under his ROWOW on the tube--and building my dream of homebuilt /own batteries now seems a step closer --- i might then have enough energy to finish my flux capacitor conversion to my kangoo van .