How to Start a Solar Installation Business

Choose your business model first

Decide how you'll make money before you buy equipment, because the model sets which licenses, credentials, insurance and cash you need. Four ways to start:

• Full-service residential installer. You sell, design, permit, install, manage the utility interconnection and service the system. You keep the whole margin and carry every risk, from the roof penetrations to the utility's approval queue.
• Install-only subcontractor. Sales companies or larger installers bring the jobs and you install them. You spend less on marketing, but your calendar and your pay depend on someone else's pipeline, so read their payment terms, warranty obligations and change-order rules before you sign.
• Electrical contractor adding solar. If you already hold the license your state requires for the electrical work, PV fits next to the service upgrades, battery backup and EV charger installs you may already do.
• Service and repair. Troubleshooting, inverter swaps, monitoring problems, and taking arrays off and putting them back for roof replacements. The tickets are smaller, but the work teaches you the equipment before you sell full systems, and owners of existing systems need someone to call when something stops working.

How customers pay matters as much as what you install. Cash and loan buyers own their systems. With a lease or power purchase agreement, a third party such as a financing company owns the system and the homeowner pays for its use or its power. Each path changes when you get paid and how the 2025 tax law affects the sale, which is covered below.

Get licensing answers before you sell

Solar touches the roof, the structure and the home's electrical service, and each state decides which licenses cover which part. Get your state's answer in writing from the licensing authority, not from an installer in another state, because the rules don't transfer across state lines.

Don't count on a certification to cover you. NABCEP says its certifications are voluntary, are not a license issued by a government agency, do not authorize anyone to practice and do not replace state licensing requirements ¹.

Ask your state's contractor licensing board, and its electrical licensing board if that's a separate agency:

1. Which license covers the PV electrical work, from the array wiring to the inverter and the connection to the home's electrical service?
2. Which license covers the roof attachments and racking?
3. Does the state have a solar-specific license or endorsement?
4. Who must hold the license: the owner, a qualifying employee, or someone on every job site? What supervision rules apply to unlicensed helpers?
5. What does licensing require: an exam, a bond, proof of insurance, documented experience?
6. Is there a separate registration for home improvement contractors, or for salespeople who sell in customers' homes?
7. Does each city or county you'll work in require its own contractor registration before you can pull permits?

If you don't hold the license for the electrical portion, you can earn it, hire someone who holds it, or subcontract that portion to a licensed electrical contractor where your state allows it. Each choice changes your costs and your schedule, so settle it before you price a job. Crew supervision, safety training and worker classification are covered in hiring your first solar installer.

Plan your NABCEP credentials around real installs

NABCEP (the North American Board of Certified Energy Practitioners) offers voluntary certifications for solar professionals ¹. They don't license you, but they give customers and business partners a way to check that you know the trade. Two fit the start of a solar business:

The PVIP can't be your day-one credential. NABCEP counts only installations that are complete, permitted and passed final inspection, each rated at least 1 kW DC, and only where you held a decision-making role such as lead installer, system designer, project manager or foreman ¹. So start a log on your first job: address, system size, permit number, final inspection date, your role and photos. When you have enough qualifying installs, most of the application is paperwork you already have.

Certifications and credentials are valid for three years, and you apply to renew during the third year ³. Put the date and your continuing education on the calendar now. Before you pay for training, ask the financing companies, distributors and any state or utility incentive programs you plan to work with which credentials they require.

Learn the permit path in every town you serve

Permits are local. Your city or county building department, the authority having jurisdiction (AHJ) in code language, decides what you submit, how review works and what the inspector checks. Learn each AHJ's process before you promise a customer an install date.

SolarAPP+ where it's adopted

Check whether each AHJ in your area uses SolarAPP+, an online platform that instantly issues permits for code-compliant residential rooftop PV systems ⁴. It was developed by the National Renewable Energy Laboratory (NREL), which was renamed the National Laboratory of the Rockies in December 2025 ⁵. It checks the system details the contractor enters against model building, electrical and fire codes. NREL built it with code officials, AHJs and the solar industry, and its specifications were developed with groups including the International Code Council, the International Association of Electrical Inspectors and Underwriters Laboratories ⁶.

Where it's available, your permit doesn't sit in a plan review queue, which makes install dates easier to predict. The instant answer is only as good as your inputs, though, so learn exactly what the platform asks for before your first job in that jurisdiction, and ask the department how inspections are scheduled for SolarAPP+ permits.

Everywhere else

Build a standard plan set for your most common design (site plan, electrical diagram, equipment data sheets, roof attachment details) and adapt it to each department's checklist. Then ask the plan reviewer:

• Which editions of the building, electrical and fire codes do you enforce?
• What do you want to see on the electrical diagram and the equipment labels?
• Do roof attachments need structural review or an engineer's letter?
• How are inspections scheduled, and what do your inspectors check on PV jobs?

Track permit and inspection times by AHJ. After a few jobs you'll know which towns add weeks to a project, and you can set customer expectations and payment milestones to match.

Map interconnection and export credits for each utility

A grid-tied system needs the utility's approval before it can run, usually called permission to operate (PTO), and every utility has its own interconnection process. Before you sell in a utility's territory, find out:

• Where the interconnection application goes, and whether the homeowner, the installer or either one can submit it.
• Whether the utility wants an approval before installation or only after.
• Which documents it requires, such as signed agreements, diagrams, equipment specifications or proof of final inspection.
• Whether the meter has to be changed, and who schedules that.
• How long approvals have actually been taking for other installers in that territory.

Put the wait in writing. Tell customers in the proposal that the system stays off until the utility grants PTO, and give them a realistic range. If part of your payment depends on PTO, your cash waits on the utility too. The solar invoicing guide covers milestone schedules that keep you funded through that wait, plus change orders for panel upgrades found after the site survey.

How the utility credits exported power

What a system is worth to your customer depends heavily on how their utility credits the power it sends to the grid. Net metering is one approach, and the rules vary by state and by utility. Pull the current rate schedule and export credit rules for every utility you serve, note their effective dates, and check for changes before you quote. Your savings estimates depend on them, and so does the honesty of your proposal. The solar proposal guide shows how to state those assumptions in writing.

Build your offer without the federal homeowner tax credit

The residential clean energy credit (section 25D) let people claim 30% of the cost of qualifying clean energy property installed at their home from 2022 through 2025 ⁷. The 2025 law commonly known as the One, Big, Beautiful Bill (Public Law 119-21) ended it for expenditures made after December 31, 2025 ⁸.

The installation date is what counts. The IRS treats the expenditure as made when installation is complete, so a system paid for in 2025 but finished in 2026 doesn't qualify ⁸. Battery storage was on the same list of qualifying property and falls under the same cutoff ⁷.

Example: Take an illustrative $20,000 system. Installed in 2025 for a buyer who qualified, the 30% credit described above was worth $6,000, for a net cost of $14,000. Installed in 2026, the same system costs that buyer $20,000 before any state or utility incentive. If your sales pitch led with the $14,000 number, the pitch has to change, not just the price.

What that means for a new company:

• Remove any template, ad, web page or proposal language that offers the federal credit on homeowner-owned systems.
• Sell on the customer's real numbers: their usage, their utility's rates and export credits, and your actual price, with financing if it helps.
• List any state, local or utility incentive as conditional, with its source and expiration date.
• Don't give tax advice. Send questions about a customer's own return to a tax professional.

The clean electricity credits in sections 45Y and 48E are separate and follow different rules. Under IRS Notice 2025-42, the 48E credit is not available for a solar facility placed in service after December 31, 2027 if its construction began after July 4, 2026 ⁹. If you plan to offer leases or power purchase agreements through a financing company, ask how these rules affect the products it will fund and for how long, and have a tax professional review anything you put in writing about credits.

Set up distributors, equipment and records

Open supplier accounts before you need them, and have your license, insurance certificates and business documents ready when you apply for credit.

• Use at least two distributors, so one backorder doesn't stall a job with a crew already scheduled.
• Standardize on a short equipment list. Every new module, inverter, racking or battery line means new install manuals, new data sheets for permit packages and new warranty terms to learn.
• Read the warranty terms before you buy. Find out whether coverage depends on product registration, installer training or approved mounting and monitoring hardware. If a manufacturer offers an installer program, learn what it requires and what it gives your customers before you join.
• Record serial numbers at install. Photograph the labels on modules, inverters and batteries and keep them with the job record. You'll need them for warranty claims and monitoring setup.

Budget by category instead of borrowing someone else's startup numbers: licensing and exam fees, NABCEP training and exam fees, insurance, a vehicle that can carry modules and ladders, a safe way to get modules onto the roof, fall protection, electrical test equipment rated for the DC voltages in PV systems, torque tools, design and permitting software, and working capital to buy equipment before the customer's later payments arrive.

Get insurance quotes for general liability, commercial auto and, once you hire, workers' compensation (your state sets those rules). Ask your agent to confirm in writing that your policy covers rooftop PV installation, including leaks from roof penetrations that may show up long after the job. Rooftop solar combines fall hazards with electrical ones, and modules produce electricity whenever light hits them, so safety training and equipment belong in the budget from day one.

Price per watt and protect your cash

Price each job from your real costs, and track both cost and price per watt (DC) so you can compare jobs of different sizes. Build every quote from the same buckets: modules, inverters, racking, balance of system (wire, conduit, disconnects, labels), labor, permit and interconnection fees, design time, sales cost, overhead and profit, plus adders such as main panel upgrades, roof repairs, trenching for ground mounts and batteries. The full method is in how to price solar installations.

Example: Say a 7 kW system (7,000 watts DC) has direct costs of $14,000 for equipment, crew labor, and permit and interconnection fees. That's $2.00 per watt. To keep a 30% gross margin for overhead, sales and profit, divide by 0.70: $14,000 ÷ 0.70 = $20,000, or about $2.86 per watt. Adding a 30% markup instead gives $18,200 ($2.60 per watt), which is only about a 23% margin. These numbers are illustrative, not market prices.

If that margin math is new to you, read markup vs margin before you build a price list.

Equipment is a large purchase made before the job is finished, so line up distributor terms, a deposit and milestone schedule, and a cash cushion before your first sale. Check your state's home improvement contract rules before you set a deposit amount.

Plan your sales approach with the rules in mind. If you'll sell door to door, or by phone and text, learn the consumer protection and telemarketing rules first. The solar customers guide covers them, along with referral partners and following up on proposals.

A startup checklist

1. Choose your business model and the ways customers will pay.
2. Get your state's licensing answers in writing, then get licensed or line up a licensed electrical partner.
3. Get insured, with rooftop PV coverage confirmed in writing.
4. Earn the NABCEP PV Associate, start your install log and plan for the PVIP.
5. Learn the permit path for each AHJ, using SolarAPP+ where it's adopted.
6. Map interconnection, PTO and export credit rules for each utility you serve.
7. Open at least two distributor accounts and standardize your equipment.
8. Build per-watt pricing from real costs and set milestone payments.
9. Strip the federal homeowner credit from every sales material, and sell on real numbers.