Solar energy is measured the same way as any other kind of energy. We can collect energy from the sun in solar panels, etc, and calculate it in joules (definition here). We can also measure the electricity we gain from it in the normal units of volts, amps, etc. As for how much energy total comes from the sun, the best we can do is estimate based on what we know about the energy that is received from the sun under different conditions.
Apologies for the long link there. It was supposed to just be on the word “here.”
Solar energy is measured by how many watts we use. The panels use the sun’s energy to harness solar which is then sent to the grid and the inverter and converted from DC power to AC power and then powers your home’s needs. You measure your home appliances in watts so you too can measure how much electricity you are using from solar energy in watts. On your electricity bill is is measured in Kw, to convert watts to kw here is an example (1000 watts is 1kw, 3000 watts is 3kw). Here is a very useful site.
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