Exactly. Coal, wind, and nuclear plant owners would just start charging batteries. Then the price will rise at night and lower during the day. Anyone who buys

Exactly. Coal, wind, and nuclear plant owners would just start charging batteries. Then the price will rise at night and lower during the day. Anyone who buys one of these just for time-arbitraging electricity is taking a pretty big risk. This smells of the Newman/Krammer bottle deposit arbitrage scam.