Fixed vs. Escalating Solar PPA Rates: What Is an Annual Escalator?
Earthlight Technologies • November 9, 2026
Fixed vs. Escalating Solar PPA Rates: What Is an Annual Escalator?
If you are comparing solar power purchase agreement (PPA) quotes, you may see the term annual escalator. It is one of the most important details in your agreement, and it is a question we hear often from homeowners in Connecticut and Massachusetts.
What Is a Solar PPA Rate?
With a PPA, you pay an agreed rate for each kilowatt hour (kWh) of electricity your solar system produces. Earthlight offers two types of PPA rates: an escalating kWh rate and a fixed kWh rate. New to PPAs? Start with our simple guide to solar PPAs.
How an Escalating PPA Rate Works
An escalating PPA begins with an agreed rate per kWh that rises by a small percentage each year. The most popular escalating PPA we offer uses a 2.99% annual escalator. For example, on a starting rate of 16 cents per kWh, a 2.99% increase adds just under half a penny, bringing the rate to about 16.48 cents in year two. In most cases, the increase is less than half a penny per year at the start.
How a Fixed 0% PPA Rate Works
A fixed PPA has a 0% escalator, so your rate never changes. If you agree on 20 cents per kWh, you pay 20 cents per kWh for the full 25 year term of the agreement.
Which PPA Rate Is Right for You?
It comes down to your plans for the future. A fixed rate often makes sense for a forever home or a home you plan to pass down. One Earthlight team member locked in a 0% rate on his own home in 2024 because he expects the house to stay in the family. If his son takes it over in 2036, he will still be paying a 2024 rate.
Fixed rates also appeal to homeowners on fixed incomes. With either structure, you know your costs in advance, which helps protect you from unpredictable utility rate hikes. Compare all of your solar financing options or read why solar offers predictable energy for CT homeowners.
Frequently Asked Questions
Does a solar PPA have an annual rate escalator?
Some solar PPAs have an annual escalator and some do not. Earthlight offers both. An escalating PPA raises your per kWh rate by a set percentage each year, with 2.99% being the most popular option. A fixed PPA has a 0% escalator, so your rate stays the same for the entire agreement.
What does a 2.99% PPA escalator mean?
A 2.99% escalator means your per kWh rate rises by 2.99% each year. On a starting rate of 16 cents per kWh, that adds just under half a penny in the first year. The increase is small at the start, and you know exactly how your rate will change over the life of the agreement.
Is a 0% fixed solar PPA rate worth it?
A 0% fixed rate is often worth it if you plan to stay in your home long term, pass it down to family, or live on a fixed income. Your rate stays the same for all 25 years, so the power your system produces costs the same in year 20 as it does in year one.
Can I pay off my solar PPA early?
Yes, in most cases you can pay off a solar PPA early. Most PPA financing companies allow homeowners to buy out the system before the term ends, and some even offer a discounted rate to do so. Check your agreement or ask Earthlight to help you review your buyout options.
Are there advantages to buying out a PPA early?
Yes, buying out a PPA early removes your monthly solar payment, and you may qualify for a discount on the payoff amount. Some financing companies offer a reduced price when you pay the full balance at once. The exact terms depend on your financing provider, so review your agreement or ask Earthlight to help you request a payoff quote.
Want to see both rate options for your home? Request a free solar consultation or call Earthlight at (860) 871-9700.
