Dr. Tom’s measurements on May 9, 2:00 PM, sunny weather:The rheostat (load) was manipulated to obtain the maximum VxI value

Power:P = IxV

The big 60cm x 60 cm array:

No load: V = 35.5 Volts

For a maximum powerrheostat setting:V = 25 Volts I = 1.4 Amps

The small single cell,maximum power:

V = 0.27 Volts I = 0.48 Amps