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Its a conversion for cheap self sustained living. Looking for cheapest way to store about 20kW. Used is fine.
Joined up here while looking for cheap energy storage solutions for a school bus.
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You need units designed specifically for deep cycling. 2nd hand batteries are hardly worth the trouble.
The best battery value by far is Duracell (actually Deka/East Penn) FLA deep cycle golf cart batteries, 2x6V, around $200 per 200+AH @12V pair from BatteriesPlus or Sam's Club.
NAPA relabels it here: https://www.napaonline.com/en/p/NBP8144 Deka self-labeled also sold at Lowes.
Taking care of them properly you should get at least 3-4 years' use even if cycled daily.
Possibly 6-8 years, depends on how well coddled.
The best battery value by far is Duracell (actually Deka/East Penn) FLA deep cycle golf cart batteries, 2x6V, around $200 per 200+AH @12V pair from BatteriesPlus or Sam's Club.
NAPA relabels it here: https://www.napaonline.com/en/p/NBP8144 Deka self-labeled also sold at Lowes.
Taking care of them properly you should get at least 3-4 years' use even if cycled daily.
Possibly 6-8 years, depends on how well coddled.
Would this be for an Ev conversion or energy storage. If energy storage this is probably not the right place to ask.
DIY powerwalls facebook, or Google Diy Powerwalls. secondlifestorage.com has many smart people in it.
Will you be building the battery bank from individual cells? 24v would be the minimum voltage IMO to use. 8s LiFePO4 16sis 51.2v nominal perfect for 48v inverters you would need aprox [email protected]=20.480kWh, [email protected] =20.480kWh
200Ah lead acid deep cycle =120Ah-160Ah usable storage capacity 1920 Wh per pair so 11 pairs :2200Ah only 60-80% [email protected]=21.120kWh I agree this would be the cheapest in the short term also weigh the most.
There are many Used Batteries out there some as low as $100 a kWh of capacity.
Later floyd
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244 Posts
I have some connections at Earls Battery in Port Huron if Lead Acid is the way you want to go... Let me know and I can make a connection.
Earl's Battery Service - Fraser, Port Huron, and Brownstown, MI
Earl's Battery specializes in industrial forklift battery repair, service, and maintenance. We also sell, buy, and recycle used auto batteries.
www.earlsbattery.com
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41 Posts
If I were you I'd look into buying the entire pack out of a wrecked Nissan Leaf, either 24kwh or 30kwh. Couple thousand for a very compact battery with a very convenient form factor.
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