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ECO-WORTHY via AliExpress has ECO-WORTHY 2-Pack 48V 314Ah LiFePO4 Batteries with 32.15kWh Total Storage on sale for $3350 when you clip the $180 off coupon and apply code BYE180F at checkout (Backup code: USAFF155).

Two large-capacity batteries provide home energy storage for compatible solar and backup systems. Shipping is free from US warehouse.

Specs:[list][*]Quantity: 2 batteries[*]Total Energy: 32.15kWh[*]Capacity per Battery: 314Ah