Columbia Water & Light provides rebates based on the overall capacity of a PV system (kW) as well as its energy production (kWh) during “peak” times. Peak times are periods of high system demand when electricity is most expensive for Water & Light to provide to its customers and normally occur on hot summer afternoons and evenings.
A net meter can measure electricity flowing to the utility from a customer’s renewable energy system on sunny days when a customer is producing more energy than they are using. It can also reverse its direction to measure the amount of electricity used by the customer that is supplied by the utility. At the end of the month, the customer is billed for the difference or the ‘net’ amount of electricity used over the month’s time.