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aminy23 t1_isdq8pp wrote

Have you just considered buying a deep cycle marine batteries?

A size 24DC marine battery from Walmart is $80 and 12V 109 AH.

Two of them is 218 amp hours and $160.

Add $20 for a charger, $8 for a 12V outlet, and a little bit of wire and for $200 you got your target.

I considered building a KW/hr lithium battery once and realized it'd cost many hundreds and require specialized chargers, battery balancers, and protection boards.

Lithium batteries are spot welded, not soldered. Soldering them can overheat them and make them explode.

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wilisi t1_ise8w3o wrote

Lead acid batteries might require some modicum of ventilation (for Hydrogen released during the charging cycle), just something to keep in mind.

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