Chapter 19, Problem 2P

A PV battery system has an efficiency of 80%. 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 generated by the PV array if the load is 150 watts running for 5 hours per night?

Two automobile headlights are connected in series to a 25 Volts battery each having a resistance of 1.0 Ohm and 2 Ohms respectively. What is the current flowing in the circuit? (in ampere)

Determine the luminous efficacy of the following lamps having comparable illumination outputs:a. A 300 W incandescent lamp that emits 5820 lmb. Two 32 W linear fluorescent lamps that emit 2950 lm per lamp in a luminaire that consumes 70 W including the ballastsc. A 70 W metal halide lamp that consumes 88 W, including the ballast and emits 5500 lm