@Gary posted:We just watched 2 hrs of sat Tv with lights on. 2 cheap group 27 5 yrs old flooded batteries and the control still says 12.6 . In the morning with the furnace set at 58 degrees it will say 12.5 then the sun will be up and in a few hours fully charged. I have to wonder why spend lots of money on lithium when the old technology works so good
Because lithium batteries are 1/3 the weight, recharge 2-3x faster, last more than 3000 nights off the grid, and will not degrade in life if not fully recharged due to a cloudy short, winter day. Besides, the inner nerd in me enjoys new technology.
I camp off the grid 50+ nights a year mostly in AZ in winter. A set of flooded lead acid batteries lasted less than 3 years. These days, an equivalent lithium battery is not that much more expensive than flooded lead acid, and will last my lifetime. YMMV