Most rooftop solar projects are connected to the larger electricity grid. Logistically, connecting your rooftop solar to the power lines already feeding your home is the most straight-forward way to power your home with rooftop solar. This also ensures that when the sun isn’t shining, you can get power from your utility. Lastly, any unused solar flows back into the grid, bringing more clean energy to our electricity system, benefiting you, your neighbors and the community!
How homes are compensated for their excess solar
Electricity generated from rooftop solar first serves your home’s onsite electricity demand. If your home’s solar system generates more electricity than you use during a given billing cycle, you will receive some type of credit for the electricity you send to the grid.
What type and how much credit you receive depends on your utility. If you are a Rocky Mountain Power customer, keep on reading. If you are served by a local municipal utility, click here to get the details on your net metering or solar export credit rates.
Solar export credit details for Rocky Mountain Power Customers
Residential Rocky Mountain Power customers pay an average of 10.2 cents for every kilowatt of electricity used – your exact rate might be a little higher or lower. Rooftop solar homes receive 9.2 cents in credit back for every kilowatt-hour of solar electricity they send to the grid. This simple billing arrangement allows rooftop solar owners to receive a financial benefit for solar that they don’t use, lowering your energy bills even further and decreasing the payback period for your solar. Of note, you can bank these credits on your bill to roll over each month, but your unused credits expire each year in March.
Lock-in solar export rates: Rocky Mountain Customers who install solar now will lock in these export rates until December 31, 2032! However, solar export credits are currently under debate before the Utah Public Service Commission and will likely change in late 2020 pending the conclusion of a long-running docket. There are no guarantees that future rooftop solar customers will the same credit in the future.
Solar Export Credit Values for Rocky Mountain Power Customers
Guaranteed until 2033!!
|Rate Schedule||Export Credit for solar (¢/kWh)||Average Electricity Price from RMP (¢/kWh)|
|Residential||9.2 cents||10.2 cents|
|Medium Commercial (6)||3.4 cents||3.7 cents|
|Medium Commercial Energy Time of Day (6A)||6.6 cents||7.1 cents|
|Medium Commercial Demand Time of Day (6B)||3.4 cents||3.7 cents|
|Large Commercial (8)||3.5 cents||3.8 cents|
|Metered Outdoor Nighttime Lighting (15)||4.9 cents||5.3 cents|
|Traffic and Other Signal Systems (15)||7.8 cents||8.4 cents|
|Irrigation (10)||5.6 cents||6.1 cents|
|Small Commercial (23)||8.2 cents||8.9 cents|
Not a Rocky Mountain Power Customer
Many municipal utilities offer a 1:1 credit for solar kilowatt-hours exported to the grid, a policy known as net metering. Review your municipal utility’s solar policy to learn more. Always contact your municipal utility before installing solar to ensure you have up-to-date information on their solar policy and are in compliance with your utility’s specific requirements.