Imagine a very simple, reliable solar water heater using PVs directly connected to the electric resistance heating element of a small electric water heater. The water heater is one that would deliver 2.88 kW if it were wired to normal 120 V ac. 1-sun 2 Idealized -V curve amps for 1 module 0 0 4 PV modules 20 volts Electric water R heater rated at 2.88 kW and 120V Suppose you have 4 identical PV modules, each with an idealized, 1-sun, I-V curve as shown above. Three ways that you can wire up the PVs are A, B, and C as shown. + 0000 88 89 (a) (b) + (c) + Plot the I-V curves for the three combinations (A, B, and C) and decide which one delivers the most energy in a day's time. Explain your answer. Hint: During a day, the insulation changes with time. And Isc (short circuit current) changes linearly with insolation. The Voc (open circuit voltage) however usually does not change much with insolation. Ignore temperature effect.