Grid & off-grid

Net metering calculator, Colorado

Enter your exact usage, system size, and rate details to see how Colorado's net metering policy affects your solar bill, with precise controls for season, tiered rates, and fixed fees.

Your numbers

1 Project details Optional
Shown on your exported report. Leave blank to skip.
2 Your usage and system
Find this on a recent utility bill, usually labeled kWh used.
Use your quoted or planned system size. Panel count times panel wattage divided by 1,000 gives a rough figure.
Solar production swings seasonally; pick a specific month type to see how your bill shifts.
Most utilities charge a flat customer or connection fee regardless of usage.
3 Your location and rate
Defaulted to Colorado's statewide average. Adjust if you know your local figure.
Defaulted to Colorado's current average residential rate. Your utility's actual rate may differ.
Colorado typically credits exports around 100% of retail. Full retail 1:1 net metering required for investor-owned utilities up to 120 percent of average usage.
Some utilities charge progressively higher per-kWh rates as monthly usage climbs into higher tiers.
Accounts for inverter loss, wiring loss, dust, and temperature derate combined.
Informational only. A monthly cycle means unused export credit does not carry to the next bill; annual and rolling cycles do.

How it works

Three steps to your Colorado solar bill estimate

Step 1

Enter your usage, system size, and season

Pull your monthly kWh from a recent bill and enter your planned or quoted system size in kW. If you only know your panel count, multiply it by each panel's wattage and divide by 1,000 to get a kW figure first. Select a season to model a specific month rather than only an annual average.

Step 2

Confirm your rate, tier, and export credit

Colorado's typical residential rate and export credit level are filled in by default. Swap in your utility's actual tariff numbers, tier bracket, and fixed monthly fee if you have a recent bill or interconnection agreement showing them.

Step 3

Compare the result to a full retail scenario

Run the net billing vs net metering comparison tool to see exactly how much Colorado's current export credit rate costs you compared to full 1:1 retail crediting.

How net metering works in Colorado

State law requires full retail crediting from investor-owned utilities

The Colorado Public Utilities Commission requires Xcel Energy and Black Hills Energy, the state's two investor-owned utilities, to offer net metering at the full retail rate for residential systems up to 120% of a customer's average annual usage. Xcel caps residential net metering at 25 kW, more than enough for the typical 7 to 12 kW system found on most Front Range homes.

The annual true-up changes the math on excess credits

Xcel performs a year-end true-up each April, while Black Hills Energy runs its own on a slightly different schedule, generally in March, so check the specific month with whichever utility serves you. Credits earned during the year roll forward month to month as normal, but any credit still on the books at that April true-up gets paid out at a lower avoided-cost rate rather than carried forward at full retail value. That's a strong argument for sizing a system to roughly match your annual consumption rather than deliberately overproducing, and the avoided cost rate calculator shows how that lower settlement rate is typically built up.

Municipal and cooperative utilities aren't required to participate

Colorado's net metering mandate applies specifically to Xcel and Black Hills as investor-owned utilities. The state's municipal utilities and rural electric cooperatives are not required to offer net metering under the same law, so if you're outside Xcel or Black Hills territory, checking your specific provider's own policy matters more than assuming the statewide rule applies; the PUC's Colorado Energy Savings Navigator can help you find what rebates and programs your specific utility offers.

What interconnection looks like once you're set to install

Both Xcel and Black Hills run their own interconnection review before a system can be energized, and cost scales with system size the way it does elsewhere, though Colorado's tax credit and rebate estimator can help offset some of that upfront cost.

Is off-grid worth it in a state with strong net metering?

With full retail crediting already in place for most Colorado homeowners, the case for going fully off-grid is weaker here than in states with reduced export rates, since off-grid systems still require battery capacity sized for the worst week of the year. The grid tie vs off grid comparison tool runs the numbers directly against Colorado's actual net metering terms.

Questions

Frequently asked

Colorado requires Xcel Energy and Black Hills Energy to offer full retail net metering up to 120% of a customer's average annual usage. Xcel performs an annual April true-up, paying out any leftover credit at a lower avoided-cost rate rather than carrying it forward at full retail.

The average residential rate in Colorado is about 16.2 cents per kWh. Xcel Energy and Black Hills Energy are required to offer full retail net metering; municipal utilities and cooperatives are not bound by the same mandate.

Xcel settles accounts each April. Credits carry forward month to month at full retail value throughout the year, but whatever remains unused at that April true-up is paid out at a lower avoided-cost rate instead of full retail, which is why right-sizing a system to your annual usage matters in Colorado.

Not necessarily. Colorado's full retail net metering mandate applies specifically to Xcel Energy and Black Hills Energy, the state's investor-owned utilities. Municipal utilities and rural electric cooperatives aren't required to offer the same terms, so check with your specific provider if you're outside those two territories.

Related tools

Compare Colorado's policy to other structures

Grid tie vs off grid comparison Net billing vs net metering Buy all sell all vs net metering Avoided cost rate calculator Grid export cap calculator Grid interconnection cost estimator Grid tie with battery backup comparison All grid and off-grid tools