I have the original Deka GEL batteries that came with the GEM e2 2009. I need replacement of the batteries. I know Trojan AGM batteries are really good choice. Have any of you used NorthStar Batteries? A gentlemen that repairs Gem is selling me a set for $320 each. Don’t know if to buy Original GEL’s, Northstar, or convert to Lithium.
Specifications indicate this is a STARTING service unit. Your original batteries were DEEP CYCLE. They served you well. Why do you want to change? There are AGM DEEP CYCLE batteries available in the price range you mentioned. I suggest you check further. DEEP CYCLE battery construction is different. Plates are thicker to not warp with constant heavy charge rates. Suggest you do a little research. Starting batteries will work for awhile but constant deep discharging and heavy recharging will eat them up.
A 10kwh from Polaris is ~$10k 80 mile range listed.
Drop in 12v lithium ~$1200x6. Not all will work at 72v.
A 10kw Chevy battery wired to drop in is $2500-$3500.
When available a small 20m set of green lifepo4 ~$1500
Ask @LithiumGods about a set of new BMW batteries.
Yeah I just called NAPA for the Deka gel batteries and i’m not feeling it. Warranty is 3 months free replacement and 24 months pro-rated. I will check into Lithium. I saw Allan Bullocks Chevy volt system and BMW batteries. Which ones are the to go system?
I have a 22s Volt battery here that I took out of my brothers truck to install larger.
It is wired with plug in smart bms set at 300 amps.
Not sure about shipping as I would need to unplug the bms. Then it’s not 100% ready to plug and play.