There are multiple rate plans that PG&E created if you fit into a specific category. For example, you can be on EV-A rate if you have a EV vehicle and charge in the middle of the night. It clearly the best plan to choose. Or if you have a solar system and you choose E6 (discontinued now- Time of use based) and you generate at peak hours and try to shift your use to night time. What is the best plan if you have both? http://www.pge.com/en_US/residential/rate-plans/rate-plan-options/understanding-rate-plans/understanding-rate-plans.page?