Nobody brought up the fact you can/should only discharge a lead acid battery only to 50% for lifespan which means it takes two group 27 100ah batteries to make 100 amp hours where some lithium batteries have a minimum of 2000 cycles at 100% discharge..Battleborn says 3000 cycles with 100% discharge..

Last time I looked there were over 10 lithium 100ah batteries under $500 on Amazon,once in a while under $400...A typical 100ah battery weighs 25 pounds compared to 70ish for lead acid..They charge way faster for the boondockers..I put 50 amp hours back into my 120ah lithium in less than 3 hours with a 20 amp charger and it was 100% full..Can't even come close to that with lead acid and there charging profiles..