Show me the money: A guide to financing options for solar businesses

The capital is there. The question is how to reach it.

That’s the state of solar business financing in mid-2026. Debt financing into the solar sector hit $8.9 billion in the first quarter of the year — the highest quarterly total in more than a decade. For installers, developers, and equipment suppliers, that means capital is available, but knowing where to look — and how to position the business to qualify for the best terms — makes all the difference.

For a solar business raising capital in 2026, the toolkit generally comes down to two categories: SBA-backed loans and conventional bank financing. Understanding what lenders are actually evaluating — credit, revenue, and track record — matters just as much as knowing which product to apply for. Here’s how it all fits together.

SBA loans: still the most accessible government-backed option

The SBA’s two flagship programs remain the starting point for many small and mid-size solar contractors.

SBA 7(a) loans offer up to $5 million with terms stretching from 10 to 25 years depending on use of proceeds — longer terms for real estate, shorter for equipment or working capital. They’re flexible enough to cover nearly anything a growing solar business needs: trucks, racking and installation equipment, a working capital line to bridge between project deposits and final payment, or even acquiring another installation company.

SBA 504 loans are the better fit for a business buying real estate or making a major fixed-asset purchase — a warehouse, a fabrication facility, a large-scale rooftop or ground-mount system for the business’s own use. These loans go up to $5.5 million, typically require just 10% down, and come with below-market, fixed-rate terms over 20 years, structured through a bank plus a Certified Development Company.

The tradeoff with both programs is underwriting speed and documentation. Lenders generally want two-plus years of operating history, a credit score in the mid-600s or better, and comfortably over $200,000 in annual revenue before approving a loan of any meaningful size. For newer installers or those scaling fast, that can be a mismatch between the growth they’re trying to finance and the track record lenders want to see first.

Conventional financing: lines of credit, term loans, and equipment finance

Outside the SBA system, most solar contractors lean on a mix of conventional products, matched to different parts of the business:

• Business lines of credit are the workhorse for contractors juggling multiple projects with staggered payment schedules — draw what’s needed against a project’s cash cycle, pay interest only on the balance used.
• Equipment financing, often exceeding $2 million for fleet or specialized machinery, lets a company acquire trucks, cranes, and installation equipment with the asset itself serving as collateral, spreading cost over its useful life rather than tying up working capital.
• Traditional term loanscover larger, one-time needs — buying out a partner, funding a company-owned solar asset outright, or financing a specific project when a business wants to hold the system on its own balance sheet and capture the ITC and MACRS depreciation directly rather than passing them to a third-party owner.

Conventional lenders move faster than SBA channels in many cases, but pricing reflects that: rates run higher, and terms are shorter. For businesses with strong financials, that tradeoff is often worth it for the speed and flexibility.

What lenders look for

Whether a solar business is pursuing an SBA loan or a conventional bank product, the underwriting questions are largely the same — lenders are trying to answer one thing: can this business repay the loan reliably, even if a project or two slips?

Credit history comes first. Lenders look at both the business’s credit profile and, for smaller companies, the owner’s personal credit — a score in the mid-600s or better is typically the floor for competitive terms. Beyond the raw score, lenders want to see consistent, on-time payment history and a manageable level of existing debt relative to revenue.

Revenue and cash flow matter as much as the top-line number. Lenders want to see steady, predictable revenue — not just a big number, but one that holds up month to month rather than swinging wildly with a handful of large projects. Because solar contractors often bill in installments tied to project milestones, lenders pay close attention to how cash actually moves through the business: how long between signing a contract and collecting final payment, and how much of a cushion exists in between.

Track record and time in business round out the picture. Most banks and SBA lenders want to see at least two years of operating history before extending significant credit — long enough to show the business survived a full project cycle, weathered a slow season, and can produce clean financial statements. Newer businesses aren’t automatically shut out, but they typically face smaller loan amounts, higher rates, or a requirement for collateral or a personal guarantee to offset the lack of history.

For a growing solar business, the practical takeaway is that financing readiness starts well before the loan application. Clean books, a documented project pipeline, and a demonstrated ability to collect on invoices on schedule all make a meaningful difference in what a lender is willing to offer — and at what price.

Reading the market

Taken together, these financing channels work best as complementary layers in a capital stack rather than either-or choices. A contractor might use a line of credit for day-to-day project cash flow and an SBA 504 loan to buy a facility, with the strength of the underlying business — clean financials, steady revenue, and a solid track record — determining how much each option costs and how fast it comes through.

Article by: Christopher Cornella / Vice President of Business Development / U.S. Professional Funding

Disclaimer: This article is for general informational purposes only and does not constitute financial, tax, or legal advice. Figures, deadlines, and policy details reflect information available as of August 2026 and are subject to change; solar tax credit rules, financing terms, and regulatory guidance continue to evolve. Readers should verify current figures and consult a qualified financial, tax, or legal professional before making financing or business decisions.