you're providing a chunk of storage for excess power for free i know a guy who bought an arseload of batteries and buys and sells off the grid to make a modera

you're providing a chunk of storage for excess power for free i know a guy who bought an arseload of batteries and buys and sells off the grid to make a moderate amount of money. he says it's not really paying back the time spent but he does it because he finds it interesting to optimise