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Energy Tips

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Frequently Asked Questions

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Where can I learn more about solar photovoltaic (PV) technologies?

What is the maximum size PV system I can install?

Fort Collins Utilities currently limits simple net metering.

Maximum capacity also is limited to the lesser of:

  • 120 percent of typical annual use
  • service entrance capacity

The rebates are capped at 3 kW for residential installation and 200 kW for commercial installations.

What happens if the rebates run out?

Current funding is $490,000. Subject to availability of funds, applicants on the wait list will be included in next year's program.

Are do-it-yourself projects allowed and eligible for rebates?

Do-it-yourself projects are allowed, but are not eligible for rebates.

Do I have to be tied to the electric grid to be eligible for a rebate?

Yes. Your system must be grid-tied, and you must be a Fort Collins Utilities electric customer.

Do I have to get an energy audit?

Yes, if your home was built prior to Jan. 1, 2005. You'll have to provide proof of an on-site and documented energy audit through Efficiency Works' Home Efficiency Upgrades, or another approved RESNET/BPI auditor. This audit is not required to apply but will need to be scheduled after your rebate is reserved. The audit must be completed before the rebate is issued.

Can I save money on my energy bill with a PV system?

Even with rebates and tax incentives, PV systems can take years to pay for themselves. Consult your solar contractor for a payback estimate.

Can I still apply if my proposed site doesn't quite meet the program requirements for orientation and shading?

Applications may be accepted for systems that don't completely conform to performance guidelines at a prorated rebate level in order to account for the reduced performance. Fort Collins Utilities reserves the right to exclude systems that are likely to perform substantially below the program guidelines.

What happens to the renewable energy credits (RECs) for my PV system?

Fort Collins Utilities' rebate includes the purchase of the RECs associated with your system helping with compliance with the State of Colorado Renewable Energy Standard and the community's Energy Policy and CAP goals. Commercial rebates for systems greater than 20 kW may have their RECs retired on their behalf by the City of Fort Collins.

Will the rebate program be extended?

We expect to continue through 2018 but reserve the right to discontinue this program when the funding is depleted or at the end of the calendar year, whichever comes first.

What does "assignment of rebate to installer" on the application mean?

Under some circumstances there are business or tax advantages to assign your rebate to your installer. Consult your solar contractor and/or tax accountant.

Can I apply for a rebate if I already have a PV system?

Only new PV systems installed after January 2017 are eligible.

How much will adding solar panels reduce my bill on Time-of-Day pricing?

Every household is different. Key variables include:

  • How much energy is used during off-peak and on-peak hours
  • Amount of solar generation installed
  • Orientation of the solar array(s) on your home
  • Fuel used for primary heating in your home

TOD pricing provides solar credits for energy that isn’t immediately used in your home, which flows back into the grid. The on-peak rate for generation credits is at least three times the off-peak credit rate. Energy charges reflect a similar difference between on-peak and off-peak rates. For details: TOD – Pricing and TOD Pricing – Solar Customers.

The graph below shows the monthly bills for an average Fort Collins residential customer (without solar) who uses gas to heat their home – approximately 7,700 kWh per year. In this example, the customer proposes to add a 6-kW solar system facing south, which will generate approximately 8,900 kWh (115 percent of the load).

In this example, by adding a solar array, the average monthly bill is reduced by more than $50. The total annual energy bill paid to Fort Collins Utilities is reduced from about $800 to approximately $165. The customer still purchases energy from the grid whenever their solar array is not generating enough energy for their loads, typically at night.


While all residential customers can benefit from TOD pricing by reducing or shifting a portion of their energy use from the on-peak hours, only customers with renewable generation can benefit from pushing power back to the grid during on-peak hours. Excess solar generation is credited at the full retail rate at the time it is returned to the grid.

What is the bill impact for solar customers from the change to Time-of-Day pricing?

The impact depends on how much and when energy is used, as well as the size of the solar system and direction it faces.

Some customers will have lower bills under the TOD pricing, and other customers will have higher bills. Most solar customers are likely to see an average bill increase of less than $5.25/month ($63/year) if they do nothing to reduce energy consumption during on-peak hours.

For details and a TOD expense estimator, visit Because of the change in the solar credits with TOD pricing, energy generated during the on-peak hours is at least three times more valuable than energy generated during off-peak hours.

Due south (180 degrees on the compass) is still the best orientation for solar arrays to maximize the dollar value of generation over the course of a year. East-oriented arrays generate at least 80 percent of the value provided by a south-facing array. West-facing arrays produce as much as 88 percent of the value provided by a south-facing array.

How much money is saved by conserving energy and shifting use away from on-peak Time-of-Day hours?

While all residential customers can benefit from reducing or shifting a portion of their energy use from the on-peak hours, only customers with renewable generation can benefit from pushing power back to the grid during on-peak hours. If you can use less energy than you generate during on-peak hours, you can sell excess solar power back to the grid at the higher on-peak price.

Reduce your use and costs:

  1. Reduce your overall electric use.
  2. Shift electric use to off-peak times of the day or week.
  3. Upgrade or replace energy using equipment or appliances to ENERGY STAR®.

In the example below, the average Fort Collins household bill is shown with power supplied by a 6-kW solar array. The graph illustrates that conserving 10 percent of on-peak energy use plus shifting another 10 percent of energy use from on-peak to off-peak times saves a customer with an average size solar system $60/year, or an average of $5/month.

Please contact Utilities for any questions not answered here.