As a rule, that’s correct. But…The US state of New Jersey has one hell of a deal. Viz:
Net metering for solar customers in New Jersey is another financial benefit that makes solar panels desirable there. Essentially this agreement allows you to send any electricity you don’t use to the grid for a retail-rate credit from your utility. The credit offsets the cost of buying power from the utility when you need it (after dark, for example). With a well-designed solar system, this can cut your electricity payment significantly - or even completely. At the end of a 12-month period, you’ll be reimbursed at the wholesale rate for any credits you haven’t used
The state of Massachusetts isn’t far behind:
One of Massachusetts’ most exciting solar developments is the SMART program. With this incentive, the State of Massachusetts pays Eversource, National Grid, and Until customers a fixed rate per kilowatt hour (kWh) of solar energy produced for 10-years. For systems under 25 kilowatts (kW), the rate ranges from 29 to 31 cents per kWh, depending upon your location and utility. For comparison, the regular retail rate in MA is closer to 20 cents.