What’s rooftop solar power worth? Not much, utility says
How the $4.65 charge for solar customers was calculated
Rocky Mountain Power determined the average monthly usage for residential customers is 698 kilowatt hours, which results in a $16.72 contribution toward RMP’s fixed costs. Net-metered customers’ average use is 518 kWh, so their contribution is $12.46.
The difference is $4.26, the amount the utility first proposed as a “facilities charge” on net-metered customers. It has since increased that to $4.65 after it agreed to raise the monthly service charge from $5 to $6 instead of to $8.
Net metering, by the numbers
2,412 » Net-metered Utah customers (as of March 31)
686 » New facilities installed in 2013
17.8 megawatts » Generation capacity
975,019 kilowatt hours » Excess generation
264,176 kilowatt hours » Lost by net-metered customers when credits expired
Source Utah Public Service Commission