This 12v, 40AH, 320 Amp draw, 7 kg Lithium Titanate battery would do the job:

Toshiba Li-ion/LTO 12v, 40Ah Battery, diy ev, solar storage, ebike, powerwall | eBay
Li LTO 12v (13.8v), 40Ah Battery. Toshiba ( Made in Japan). I prefer collection if possible. I can give you the BMS for free, if you buy four or more batteries. The BMS has 2 x 24v side.
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