Solar Company Insurance Cost: What Moves the Premium

Underwriters price a solar installation company on factors such as payroll by class code (workers' compensation), a rating base such as revenue and the type of roof work (liability) and claims history. Vehicles, stock, batteries and contract terms add the rest. A new owner can influence most of these through records, controls and choices. This guide gives no price ranges, because no sourced average exists for this industry and carriers set their own rates. The only rates shown are a dated example from one state bureau. It is for the search fund CEO or buyer who has to put a credible insurance line in the model and explain it to investors.

The short answer

Workers' comp is rated on payroll in each class code. Roof height, in-house electricians and staffing labor all change the picture.
Liability is often rated on a base such as revenue, payroll or subcontracted cost, depending on the class, and on the work described: residential, commercial or ground-mounted, roof work done in-house or by subcontractors, and battery storage.
Claims history follows the business. Loss runs and the mod are the first place a buyer can find errors.
Controls help: a written fall protection plan, certificate files, driver standards and clean records give underwriters something to credit.
Federal tax credit changes may move sales volume. Estimate payroll and revenue honestly, because audits true up the premium.

What do underwriters price at a solar installation company?

Each cost driver below has a reason underwriters care and a handle a new owner can pull. The table names no prices. Contract terms are in contracts, licenses and bonds for a solar installation company. Whether a change lowers the premium depends on the carrier, the state and the rest of the account.

Solar installation company cost drivers, why each matters and what a new owner can do
Cost driver	Why it matters	What a new owner can do
Payroll by class code	Workers' comp is generally a state-approved rate per $100 of payroll in each class, then multiplied by the mod	Keep pay records by class, and check that the class matches the work
Experience mod and loss runs	Past injury claims follow the business and push the mod (the claims-history multiplier) up or down	Review the worksheet and loss runs for errors and open claims
In-house electricians or subcontracted electrical work	Who does the connection work changes the workers' comp picture, the licensing question and where shock and fire exposure sits	Say which electrical work employees do, and hold certificates for subcontracted work
Revenue and the mix of work	Liability premium is often rated on a base such as revenue, payroll or the cost of subcontracted work, depending on the class, and residential roof work, commercial work and ground-mount work carry different exposures	Ask which base your policy uses, report revenue by type of work, and update it when the mix changes
Roof work in-house, height and pitch	Roof repair and penetrations raise liability and workers' comp questions, and falls are a named hazard of the job	Say what is done in-house, and share the written fall protection plan, training records and inspection logs
Battery storage share and size	Lithium-ion batteries add a fire and disposal exposure	Describe battery jobs, sizes and storage practices honestly
Sales method and financing partners	Door to door sales, dealer networks and consumer financing change the complaint, contract and fraud questions underwriters ask	Describe how leads are sold and which financing partners the company uses
Warranty terms and kilowatts installed	Installed systems leave a completed operations tail, and output promises sit in contracts	Report annual kilowatts installed and revenue by type, and share the warranty terms
Completed operations endorsements	A designated work or roofing exclusion changes what the liability premium buys	Compare quotes on the form list, not only the price
Vehicles and drivers	Trucks and trailers carry crews and heavy cargo on the road	Schedule only real vehicles and drivers, and set driver standards
Stock and equipment values	Panels, inverters and batteries are costly and attractive to thieves	Match limits to replacement cost, and review where stock is stored overnight
Subcontractors and staffing	Uninsured crews can be charged to you at workers' comp audit, and subcontracted work can also affect how liability premium is rated	Hold certificates before work starts, track dates, and ask the carrier how it treats subcontractors with and without certificates

The general version of this list is in what underwriters want from new owners, and savings are in how to reduce insurance costs after you buy a business.

How do payroll, job class and claims history move workers' comp cost?

Workers' compensation premium is generally a state-approved rate for each class code, applied per $100 of payroll, then adjusted by the experience mod (the multiplier built from claims history). Two things follow for a solar company.

Class matters. Different classes carry different rates. In Massachusetts the rating bureau assigns solar panel installation to class 5538, and its pages show a higher published rate for that class than for electrical wiring class 5190 as of July 1, 2024 (2.75 against 1.47, normally quoted per $100 of payroll). That is one state on one date, the most recent shown on the bureau pages. Carriers add loss constants, minimum premiums and the mod, so these are not what any company pays, and the class for solar work outside Massachusetts is a question for your insurer and state bureau.
The mod follows the business. Under National Council on Compensation Insurance (NCCI) rules the mod usually follows the business to a buyer, whether you bought stock or assets, and a mod recalculated because of the ownership change applies back to the date of the change. Some independent bureaus time it differently.

What can you control? The estimate of payroll, the records that split pay between classes, and how you handle the ownership change. Our guides to workers' comp, payroll and class codes for a solar installation company, workers' comp class code corrections and reviewing the experience mod go step by step. The rating organization decides the mod, and no broker can promise an outcome.

Does the type of solar work change the price?

Yes, because the type of work changes what can go wrong. The Bureau of Labor Statistics (BLS) says residential installers work on rooftops and sometimes in attics and crawl spaces, while solar farm installers work at ground level. A rooftop crew faces roof-edge fall exposure that a ground-mount crew generally faces less of, and a ground-mount crew may dig, pour pads and handle heavy equipment instead. Commercial rooftops and utility-scale sites bring different contract requirements and different customers.

What to have ready before renewal:

The split between residential, commercial and ground-mounted work
Whether roof repair is done in-house or subcontracted, plus the tallest roofs and steepest pitch
Battery storage share and size
Electricians on payroll or hired in, and any staffing company use
Financing partners, how sales are made and warranty terms
Kilowatts installed and revenue by type
Subcontractor insurance certificates and the vehicle list

An application that matches what the company really does can help avoid a later dispute over what was disclosed, and it lets the broker present the company as it is. See how to remarket inherited insurance when you are ready to compare terms, and choosing a broker for a solar installation company for who to take the list to.

How do federal tax credit changes affect the premium?

The insurance effect of tax credit changes is narrow: they may move sales volume, and revenue and payroll are often rating bases. If your estimate of revenue or payroll is too low, the premium is set from the estimate, and the final amount is trued up at audit using actual figures. If it is too high, you tie up cash in the deposit. Tell the broker about large changes mid-term, such as a new crew, a battery line or a lost financing partner. For the audit mechanics, see workers' comp payroll estimates and audit bills. For the investor side, see budgeting insurance in the acquisition model.

The rules behind the swing: the homeowner credit in 26 U.S.C. 25D does not apply to expenditures made after December 31, 2025. The business and third-party-owner credit in 26 U.S.C. 48E ends for solar facilities placed in service (finished and ready for use) after December 31, 2027, unless construction began by July 4, 2026. Internal Revenue Service (IRS) Notice 2025-42 explains how the start of construction is shown and says the older five percent safe harbor for showing it is generally not available, except for solar facilities of 1.5 megawatts of alternating current (AC) capacity or less. Energy storage is treated separately in the statute. Whether those rules change one company's sales is a question for its tax advisor.

What can a new owner change without cutting coverage?

Focus on what underwriters can see: work recorded by class, current certificates, documented fall protection and driver standards, old claims closed where possible, and schedules that list real vehicles, equipment and locations. Some choices trade cost for cash flow, such as raising a deductible, which shifts small losses to you.

A hypothetical example. A truck parked overnight at a crew lead's home is broken into, and 20 inverters worth $1,000 each are taken. The company's equipment floater has a $2,500 deductible and a condition about vehicles left unattended. A buyer weighing a $10,000 deductible to cut premium should first ask what the theft terms say, how often theft or damage claims have happened on the loss runs, and whether the company could absorb a $10,000 loss in the middle of a busy quarter. The extra $7,500 retention only makes sense if cash flow and the loss history support it. For the method, see raising deductibles after an acquisition and safety programs and premium credits.

For the model, ask the broker for a one page schedule of drivers rather than a single premium: payroll by class, revenue by type of work, vehicle count, stock values, deductibles and the mod. Refresh it when the work mix, headcount or open claims change, and tell investors which drivers you control and which the carrier and the rating bureau set.

Which change fits depends on the carrier, the state and the account. A review from Morrow can flag cost drivers in what you inherited and request quotes, but any terms depend on carrier underwriting.

Keep reading

Frequently asked questions

Will workers' comp be my biggest insurance bill?

Workers' compensation can be a large line for a company with crews on roofs, because it is rated on payroll in each class and adjusted by the mod (the claims-history multiplier). Liability, auto and equipment matter too. No sourced industry average exists, so ask your broker to show the drivers on your own policies.

Does the number of roofs we work on change liability pricing?

It can. Underwriters ask about the split between residential, commercial and ground-mounted work, whether roof work is done in-house, and maximum roof height and pitch. Liability is often rated on a base such as revenue, payroll or subcontracted cost, depending on the class, so ask which base your policy uses. The kind of work behind that base also shapes the underwriting.

Will battery storage jobs raise my premium?

Possibly. Carriers may ask about the share and size of your battery work and how you store batteries, and the answers can change terms or add conditions. Describe the work honestly on the application, because policy wording depends on what the company says it does.

Can I lower my workers' comp cost by moving staff to a cheaper class code?

No. Class codes describe the business, the insurer or rating bureau assigns them, and payroll can be split between classes only with records of actual time and pay. If an auditor finds the work is not described by the class on the policy, the class and premium can change.

How do the federal solar tax credit changes affect my insurance?

Not directly. They may change sales volume, which feeds revenue and payroll estimates. Estimate honestly, update the broker on large changes, and ask your tax advisor how the 2025 credit changes affect the company.

References

Just bought a business? Get your insurance reviewed.

Send Morrow the declarations pages, loss runs and key contracts you inherited. Morrow can review them against the business you bought, flag gaps and request quotes where it makes sense. Any new terms depend on carrier underwriting.

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This article is general information, not legal, tax or financial advice, and not a coverage determination. Coverage depends on the actual policy wording, carrier underwriting, your purchase agreement and your contracts. Ask your attorney and accountant about deal and legal questions.

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