Comment by EGreg Comment by EGreg 2 days ago 1 reply Copy Link View on Hacker News The battery doesn’t have to hold the entire year’s energy — come on :-P
Copy Link mft_ 2 days ago Collapse Comment - Indeed, but to store (let's say) half a day's energy, then (based on the previous calculation) it would presumably need ten tons dropping down a hole 0.274 miles, or 441 metres, deep? Reply View | 0 replies
Indeed, but to store (let's say) half a day's energy, then (based on the previous calculation) it would presumably need ten tons dropping down a hole 0.274 miles, or 441 metres, deep?