Solar wasted watts/volts

starcraft69 wrote:
Ok forget the hot water part If i put a over size system in how does the system dissipate the extra power being generated?

Same as when you are plugged in. Where do all those amps from the converter go? The power stays at the source and is not converted to usable power. As less power is demanded the voltage at the panel will approach Voc and remain there just like an unused home outlet.

Anyway it is nothing to be concerned about.