Colorado RENU Loan: Low-Interest Financing for Solar and Batteries

If you want to own your solar system outright but do not want to pay cash, the Colorado RENU loan for solar is one of the cleanest financing options in the state. RENU stands for Residential Energy Upgrade. It is a low-interest loan offered through the Colorado Clean Energy Fund in partnership with participating credit unions, and it lets Colorado homeowners borrow up to $75,000 with terms up to 20 years to install solar panels, battery storage, and other home energy upgrades. The big advantage: it avoids the hidden dealer fees that get baked into many traditional solar loans.

Below we walk through how the program works, what it covers, how it stacks up against dealer-fee financing, and how to fit it into a solar plan on the Front Range or Western Slope.

What is the Colorado RENU loan?

The Colorado RENU loan is a statewide residential energy financing program administered by the Colorado Clean Energy Fund, a nonprofit green bank, and delivered through a network of partner credit unions. Rather than the state cutting you a check, the green bank works with local credit unions so that you apply for and close the loan through a financial institution, while benefiting from program terms designed for clean energy projects.

Key features of the program:

• Loan amount: up to $75,000 per household.
• Term length: up to 20 years, which keeps monthly payments low.
• Use of funds: solar panels, battery storage, and a wide range of qualifying energy efficiency and electrification upgrades.
• Structure: a fixed, unsecured consumer loan through a participating credit union. It is not a lease and not a power purchase agreement, so you own the equipment.

Because the RENU program is a residential energy upgrade loan tied to a green bank, it is built specifically for projects like rooftop solar and home batteries rather than being a generic personal loan.

Why the Colorado RENU loan beats dealer-fee solar loans

Most homeowners do not realize that many no-money-down solar loans carry a dealer fee. This is a percentage the lender charges the installer to buy down the advertised interest rate, and that cost is quietly added to the system price. A loan advertised at a very low rate can carry a dealer fee of 15 to 30 percent of the project cost, which means you are financing a larger balance than the equipment is actually worth.

The RENU loan works differently. Because it is a straightforward credit union loan with transparent terms, there is no dealer fee inflating your principal. That generally means:

• A lower total amount financed for the same physical system.
• Clear, disclosed interest rates and closing terms from a regulated financial institution.
• No incentive for an installer to pad the contract price to cover a buy-down.

When you compare quotes, the honest comparison is the cash price of the system against the financed price. If a dealer-fee loan only looks competitive because the rate is artificially low while the price is inflated, RENU financing on the true cash price will often come out ahead over the life of the loan. For a deeper look at the tradeoffs between owning with a loan versus signing a lease or PPA, see our guide on solar loans versus leases versus PPAs.

What the RENU loan can pay for

The program is broader than solar alone, which makes it useful for a whole-home energy plan. Eligible measures commonly include:

• Grid-tied solar photovoltaic systems.
• Home battery storage paired with solar.
• Heat pumps for space heating and cooling.
• Heat pump water heaters.
• Electrical panel and service upgrades needed to support the above.
• Insulation, air sealing, and other efficiency improvements.

That flexibility matters in Colorado. Many homeowners add a battery at the same time as solar to handle outages and to shift energy use out of expensive evening peak hours. Because RENU can finance both the panels and the storage in one loan, you can build a complete system without juggling separate financing.

How the RENU loan fits with Colorado incentives

Financing and incentives are two separate levers, and they work together. A RENU loan covers the upfront cost so you can install now, while incentives reduce what the project ultimately costs you. A common approach is to finance the full system with RENU, then apply incentive money and any rebates toward the loan balance once you receive them, which lowers your payments going forward.

One incentive worth coordinating with your timeline is the Colorado residential battery storage tax credit, which can offset part of the cost of storage added to a solar project. Utility rebates from providers like Xcel Energy and various Colorado cooperatives may also apply depending on where you live. Because incentive amounts, deadlines, and eligibility change, confirm what is currently available for your address before you finalize a system size and loan amount.

Who is a good fit for RENU financing?

The RENU loan tends to make the most sense for homeowners who:

• Want to own their system and capture the long-term value rather than renting it through a lease or PPA.
• Prefer transparent, dealer-fee-free terms from a credit union.
• Have reasonable credit and want a longer term to keep monthly payments manageable.
• Are planning a larger or multi-measure project, such as solar plus battery plus a heat pump.

If your priority is simply avoiding any upfront cost, RENU is one of several paths. We compare the full menu of low and no-upfront options in our overview of zero down solar, which is worth reading alongside this article so you can match the financing structure to your goals.

How to apply for the Colorado RENU loan

The general process looks like this:

1. Get a detailed solar and storage proposal so you know the true cash price of the project.
2. Choose a participating credit union from the Colorado Clean Energy Fund RENU lender network.
3. Apply for the loan and complete the credit union's approval process.
4. Move forward with installation, with the loan funding the project.
5. Apply any incentives or rebates you receive toward the balance to reduce your payments.

Interest rates and specific terms are set by the lending partners and can change over time, so treat any rate you read about as a starting point and confirm the current rate, APR, and fees directly with the Colorado Clean Energy Fund or a participating credit union before you commit.

A note on getting accurate numbers

The strongest decision comes from comparing a true cash price against a transparent loan, not from chasing the lowest advertised monthly payment. As a Colorado-based installer working across the Front Range and the Western Slope, ProGreen Solar builds proposals that show the real system cost up front, which makes it easy to evaluate a RENU loan honestly. If you would like a clear, dealer-fee-free quote you can take to a credit union, reach out through our residential solar page and we will put together the numbers for your home.

Frequently Asked Questions