But it's a queuing theory problem. The average is not a good indicator. It's how often does it reach a level that is so low you need to charge. Not the averages

But it's a queuing theory problem. The average is not a good indicator. It's how often does it reach a level that is so low you need to charge. Not the averages of the system. And it's not 0%. It's a level low enough that you don't want to bet on the charge rates