[danans]

> If he makes $20,000 that would mean that he gets paid only $0.01 per kW of power. And even if my assumption above about the size of each

As others have mentioned the off peak daytime wholesale rate for electricity is often just a few cents per kWh. Let's say 3-4c/kWh.

The other few cents above your calculated rate of 1c/kWh likely go to pay off the principle and interest on the financing for the system, plus any profit for the company maintaining and servicing the system. If the farm owner paid for the capital costs and maintenance directly themselves, their share of the returns would probably be higher.

But they would probably prefer to focus on farming crops.