I am wondering why is it called Harvesting energy and why not harvesting power? Energy is measured in Joules/s and power is Watt but the result is watt. For example if we harvest energy from sun or from wind or from heat or from vibration all of these energy sources gives a output in the form of Volt and Current. So basically what we get is power.
So why don't we call harvesting power from sun or from other sources of energy?