£600
Seems it could charge and discharge 12v batteries to grid.
https://www.batterystuff.com/kb/articles/battery-articles/battery-bank-tutorial.html
its suggested to link 4 batteries together in series to get the 48v required for the battery to work.
perhaps start with a 12v unit first before progressing on to the 48v
#1 by LinkSolar team on 23/07/2026 - 9:49 am
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A sensible point to flag is that a starter battery from a car is built for short, high-current bursts, not regular deep discharge. For a 48 V inverter bank, four matched deep-cycle batteries—preferably LiFePO? with a BMS—will give much more predictable life. At 3 kW output, a 48 V inverter can draw roughly 65–75 A after losses, so correctly sized cables, a fuse/disconnect near the bank, and a realistic surge rating matter as much as the headline wattage. An MPPT charge controller and a simple daily Wh budget would make the solar side easier to size before deciding how much grid charging is needed.
#2 by Prince on 10/08/2026 - 9:09 am
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Thanks for the info. I really think we can take advantage of the dead car batteries to power homes for another 3 years before we recycle it. I will share a link to a video that has been trying to figure this out for years. This year I want to setup at least 2 examples of this and start scaling this. we need thousands of these to bring energy prices down in the UK.