When you use a grid tied PV system your fans still run on PV directly and indirectly because you have many banked hours from when the load is much smaller.
If we annually put 35000 kwh in and use 35000 kwh somebody else is still using our solar PV electricity when we are not using all of it.
If we annually put 35000 kwh in and use 35000 kwh somebody else is still using our solar PV electricity when we are not using all of it.
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