A university spent $1.4 million to install solar panels atop a parking garage. these panels will have a capacity of 500 kilowatts (kW) and have a life expectancy of 20 years. Suppose that the discount rate is 10%, that electricity can be purchased at $0.30 per kilowatt-hour (kWh), and that the marginal cost of electricity production using the solar panels is zero.

Approximately how many hours per year will the solar panels need to operate to enable this to break even