For the system in Problem 6.7, how many hours of sunlight are needed to ensure that the battery bank is at 100% charge at the end of the day assuming the same load?
Problem 7
A PV battery system has an end-to-end efficiency of 77%. The system is used to run an all-AC load that is run only at night. The charge controller efficiency is 96% and the inverter efficiency is 85%. How much energy will need to be gathered by the PV array if the load is 120 W running for 4 h per night?