News for hackers. Stuff that matters.

A comment on US Government funds pilot project for heated sand energy storage. Parent comment

Re:US Government funds pilot project for heated sand energy ... by politician on Thursday April 04, 2024 @12:37PM (#39932712)
Nit: Rechargeable batteries have a loss when converting the chemical energy stored inside to electricity. There’s no free lunch.
[ Parent | on HN ]
Re:US Government funds pilot project for heated sand energy ... by cogman10 on Thursday April 04, 2024 @02:09PM (#39933949)
Yes, but for Lithium and sodium batteries you are looking at 90+ efficiency.
[ Parent | on HN ]