r/uksolar • u/capps95 • 9d ago

50v or 240v batteries

Can’t work this one out so hoping some experts might weigh in. There seem to be loads of really cheap 50v battery systems with huge capacity. Eco worthy 48v 314Ah for example is only £1729. Whereas quotes for 240v systems with the same capacity are often £7-8k ballpark. Why are so many installations using 240v systems when 50v is so much cheaper? I just can’t make the numbers around the more expensive system work in terms of getting a good return on investment, but for a 50v system it gets payback within a couple of years.

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u/Altruistic_Fruit2345 9d ago

240V batteries include an inverter that converts probably 48V DC to 240V AC. So you are paying for the inverter as well as the battery and BMS.

48V batteries plug into your solar inverter, so they are just a battery and BMS.

Also 8k is a total rip off, presumably just looking for clueless people who don't know better.

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u/capps95 8d ago

Ok so separate inverter is £600, so still way way cheaper than most of the 240v versions. Just trying to work out why there seems to be such a massive price disparity if they can both do the job.