Solar Batteries: Everything You Need To Know (Prices, Paybacks,
In the more realistic case, the battery is not fully charged from solar in winter and not fully discharged every day. With a time-of-use tariff in the best-case situation, the rates are super off-peak (daytime) $0.08, shoulder rate $0.33, morning rate $0.51, evening rate $0.75, and the solar feed-in tariff is $0.07.