Free Solar Installation Estimate Templates (2026)
Solar installation is booming, and homeowners have more options than ever. That means more competition for every job, and the contractors who send fast, professional, detailed estimates are the ones who close the deal.
But solar estimates are more complex than most other trades. You are not just pricing materials and labor. You are also accounting for system design, electrical work, permitting, utility interconnection, and federal and state incentives that change the customer’s out-of-pocket cost. Miss a line item and your margin shrinks. Overcomplicate the estimate and the homeowner gets confused and calls someone else.
Templates solve both problems. A well-structured solar estimate template keeps every cost visible so you do not forget anything, while presenting the information in a clean format that homeowners can actually understand. It also speeds up your sales cycle because you can generate a professional estimate in minutes instead of hours.
Below you will find three solar estimate templates: one for a standard residential rooftop system, one for a ground-mount array, and one for a battery storage add-on. Each one includes realistic pricing for the U.S. market in 2026, including current incentive structures. Adjust the numbers to match your local suppliers, labor rates, and permit costs.
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How to Use These Templates
Each template is organized into sections: equipment, materials, labor, permitting and soft costs, overhead, and profit. Here is how to get the most out of them:
- Perform a site assessment. Check the roof condition, orientation, pitch, shading, and electrical panel capacity. For ground mounts, assess the terrain, soil type, and distance to the electrical panel.
- Design the system. Use design software to determine the number of panels, inverter sizing, and expected annual production.
- Pick the right template based on the installation type: rooftop, ground-mount, or battery add-on.
- Adjust unit costs to match your distributor pricing and crew labor rates.
- Update quantities based on the system design.
- Apply overhead and profit percentages to the subtotal.
- Add customer-facing notes explaining production estimates, incentives, timeline, warranty, and payment options.
The unit costs shown are mid-range estimates for the U.S. market in 2026. Equipment prices change frequently. Always verify pricing with your distributor before sending a live estimate.
Template 1: Residential Rooftop Solar Installation (8 kW)
This template covers a standard residential rooftop solar installation with 20 panels totaling 8 kW on a composition shingle roof. It assumes a south-facing roof with good sun exposure and an existing 200-amp electrical panel.
Understanding Rooftop Solar Costs
Rooftop solar is the most common residential installation type. The system sits on the existing roof using racking that attaches to the rafters through the roofing material. The panels connect to either a string inverter (one central unit) or microinverters (one per panel).
The biggest cost drivers are the panel brand and wattage, the inverter type, the roof material (tile and metal roofs cost more to install on), the number of stories, and the complexity of the electrical work. A home with an older 100-amp panel may need a panel upgrade, which can add $1,500 to $3,000 to the job.
Equipment
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Solar panels (400W monocrystalline, Tier 1) | 20 | each | $250.00 | $5,000.00 |
| Microinverters (IQ8+) | 20 | each | $185.00 | $3,700.00 |
| Racking system (roof mount, rail-based) | 1 | system | $1,200.00 | $1,200.00 |
| Roof attachments / lag bolts with flashing | 40 | each | $12.00 | $480.00 |
| DC optimizer (if needed, string inverter alternative) | 0 | each | $0.00 | $0.00 |
| Equipment Subtotal | $10,380.00 |
Electrical Materials
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| AC trunk cable (microinverter) | 80 | lin ft | $3.50 | $280.00 |
| Conduit (EMT, 3/4-inch) | 60 | lin ft | $2.00 | $120.00 |
| Conduit fittings and connectors | 1 | lot | $85.00 | $85.00 |
| Wire (THWN, 10 AWG) | 150 | lin ft | $0.75 | $112.50 |
| AC disconnect (fused, 30A) | 1 | each | $65.00 | $65.00 |
| Production meter socket (if required) | 1 | each | $45.00 | $45.00 |
| Grounding equipment (lugs, wire, rods) | 1 | lot | $120.00 | $120.00 |
| Rapid shutdown device (NEC 2020 compliant) | 1 | each | $150.00 | $150.00 |
| Breaker (30A, for main panel) | 1 | each | $25.00 | $25.00 |
| Labels and placards (NEC required) | 1 | set | $35.00 | $35.00 |
| Electrical Materials Subtotal | $1,037.50 |
Labor
| Task | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Roof layout and racking installation | 16 | hours | $75.00 | $1,200.00 |
| Panel installation (crew of 2) | 10 | hours | $75.00 | $750.00 |
| Electrical rough-in (conduit, wire) | 8 | hours | $85.00 | $680.00 |
| Inverter / microinverter installation | 4 | hours | $85.00 | $340.00 |
| Electrical terminations and panel work | 4 | hours | $95.00 | $380.00 |
| System testing and commissioning | 3 | hours | $95.00 | $285.00 |
| Roof penetration sealing and waterproofing | 2 | hours | $75.00 | $150.00 |
| Cleanup | 2 | hours | $50.00 | $100.00 |
| Labor Subtotal | $3,885.00 |
Permitting and Soft Costs
| Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Building permit | 1 | each | $400.00 | $400.00 |
| Electrical permit | 1 | each | $150.00 | $150.00 |
| Plan set / engineering stamp | 1 | each | $350.00 | $350.00 |
| Utility interconnection application | 1 | each | $75.00 | $75.00 |
| Site survey and system design | 1 | each | $300.00 | $300.00 |
| Monitoring setup (online portal) | 1 | each | $50.00 | $50.00 |
| Permitting and Soft Costs Subtotal | $1,325.00 |
Summary
| Amount | |
|---|---|
| Equipment | $10,380.00 |
| Electrical materials | $1,037.50 |
| Labor | $3,885.00 |
| Permitting and soft costs | $1,325.00 |
| Direct Cost Subtotal | $16,627.50 |
| Overhead (15%) | $2,494.13 |
| Profit (15%) | $2,868.24 |
| Total Before Incentives | $21,989.87 |
| Federal ITC (30%)* | -$6,596.96 |
| Estimated Net Cost to Homeowner | $15,392.91 |
*The 30% federal Investment Tax Credit is claimed by the homeowner on their federal tax return. Actual savings depend on the homeowner’s tax liability. Consult a tax professional.
Tips for This Template
- The 20 panels at 400W each give you 8 kW DC. Actual AC output will be about 7.5 kW after inverter losses. Design your system to match the customer’s annual electricity usage, not just their roof space.
- Microinverters cost more upfront than a string inverter but perform better on roofs with partial shading or multiple orientations. They also have longer warranties (typically 25 years vs. 12 years for string inverters).
- Always check the electrical panel. If the main panel is 100 amps or has no available breaker slots, you need a panel upgrade or a supply-side tap. Add $1,500 to $3,000 for a panel upgrade.
- Include the estimated annual production in kilowatt-hours on your estimate. Homeowners want to know what the system will produce, not just what it costs. For an 8 kW system in most U.S. markets, expect 10,000 to 13,000 kWh per year.
- List the panel and inverter warranties. Most Tier 1 panels carry a 25 to 30 year product warranty and a 25-year performance guarantee. Microinverters typically have 25-year warranties.
Template 2: Ground-Mount Solar Installation (10 kW)
This template covers a residential ground-mount solar array for homeowners with large yards and roofs that are not suitable for panels. The example assumes 25 panels totaling 10 kW on a fixed-tilt ground-mount racking system.
Understanding Ground-Mount Costs
Ground-mount solar systems cost more than rooftop installations because of the foundation work and additional materials. But they offer advantages: panels can face the ideal direction regardless of the roof orientation, they are easier to maintain and clean, and they do not require any roof penetrations.
The main cost differences compared to rooftop are the foundation (concrete piers, driven piles, or ground screws), the racking (heavier-duty posts and rails), and the longer wire runs from the array to the home’s electrical panel. Trenching for underground conduit adds labor and material costs.
Ground-mount systems also need more permitting in some jurisdictions because they are considered standalone structures. Check your local zoning and setback requirements before designing the system.
Equipment
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Solar panels (400W monocrystalline, Tier 1) | 25 | each | $245.00 | $6,125.00 |
| String inverter (10 kW, with DC optimizers) | 1 | each | $2,800.00 | $2,800.00 |
| DC optimizers | 25 | each | $95.00 | $2,375.00 |
| Ground-mount racking system (fixed tilt) | 1 | system | $3,200.00 | $3,200.00 |
| Equipment Subtotal | $14,500.00 |
Foundation and Site Materials
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Ground screws or driven piles | 12 | each | $85.00 | $1,020.00 |
| Concrete (pier footings, if needed) | 3 | cu yd | $165.00 | $495.00 |
| Sonotube forms (if concrete piers) | 12 | each | $15.00 | $180.00 |
| Gravel (base pad) | 3 | tons | $40.00 | $120.00 |
| Landscape fabric (under array) | 400 | sq ft | $0.30 | $120.00 |
| Foundation Materials Subtotal | $1,935.00 |
Electrical Materials
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| DC wire (PV wire, 10 AWG) | 300 | lin ft | $0.85 | $255.00 |
| AC wire (THWN, 6 AWG) | 200 | lin ft | $1.50 | $300.00 |
| Conduit (PVC, Schedule 40, 1-inch) | 150 | lin ft | $1.75 | $262.50 |
| Conduit (EMT, 3/4-inch, above ground) | 40 | lin ft | $2.00 | $80.00 |
| Conduit fittings | 1 | lot | $100.00 | $100.00 |
| AC disconnect (fused, 60A) | 1 | each | $85.00 | $85.00 |
| DC disconnect | 1 | each | $75.00 | $75.00 |
| Grounding equipment | 1 | lot | $150.00 | $150.00 |
| Rapid shutdown device | 1 | each | $150.00 | $150.00 |
| Production meter socket | 1 | each | $45.00 | $45.00 |
| Breaker (50A, for main panel) | 1 | each | $35.00 | $35.00 |
| Labels and placards | 1 | set | $35.00 | $35.00 |
| Electrical Materials Subtotal | $1,572.50 |
Labor
| Task | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Site preparation and grading | 8 | hours | $75.00 | $600.00 |
| Foundation installation (piers or ground screws) | 12 | hours | $80.00 | $960.00 |
| Racking assembly and installation | 16 | hours | $75.00 | $1,200.00 |
| Panel installation (crew of 2) | 12 | hours | $75.00 | $900.00 |
| Trenching (150 ft, 24-inch depth) | 10 | hours | $80.00 | $800.00 |
| Conduit and wire installation | 10 | hours | $85.00 | $850.00 |
| Inverter installation and wiring | 4 | hours | $95.00 | $380.00 |
| Electrical terminations and panel work | 4 | hours | $95.00 | $380.00 |
| System testing and commissioning | 3 | hours | $95.00 | $285.00 |
| Backfill trench and site restoration | 6 | hours | $65.00 | $390.00 |
| Cleanup | 2 | hours | $50.00 | $100.00 |
| Labor Subtotal | $6,845.00 |
Permitting and Soft Costs
| Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Building permit | 1 | each | $500.00 | $500.00 |
| Electrical permit | 1 | each | $150.00 | $150.00 |
| Plan set / engineering stamp | 1 | each | $500.00 | $500.00 |
| Utility interconnection application | 1 | each | $75.00 | $75.00 |
| Site survey and system design | 1 | each | $400.00 | $400.00 |
| Monitoring setup | 1 | each | $50.00 | $50.00 |
| Permitting and Soft Costs Subtotal | $1,675.00 |
Summary
| Amount | |
|---|---|
| Equipment | $14,500.00 |
| Foundation materials | $1,935.00 |
| Electrical materials | $1,572.50 |
| Labor | $6,845.00 |
| Permitting and soft costs | $1,675.00 |
| Direct Cost Subtotal | $26,527.50 |
| Overhead (15%) | $3,979.13 |
| Profit (12%) | $3,660.79 |
| Total Before Incentives | $34,167.42 |
| Federal ITC (30%)* | -$10,250.23 |
| Estimated Net Cost to Homeowner | $23,917.19 |
*The 30% federal Investment Tax Credit is claimed by the homeowner on their federal tax return. Actual savings depend on the homeowner’s tax liability. Consult a tax professional.
Tips for This Template
- Ground-mount systems cost 20 to 40 percent more than rooftop systems of the same size because of the foundation and trenching work. Set expectations with the customer early.
- Ground screws are faster and cheaper than concrete piers in most soil types. They can be installed in a few hours with a drive machine. Concrete piers require digging, forming, pouring, and a 3 to 7 day cure time.
- The wire run from the array to the house is the biggest variable. Every 50 feet of additional distance adds $200 to $400 in materials and labor. Keep the array as close to the electrical panel as practical.
- Check local setback requirements. Most jurisdictions require the array to be set back from property lines just like a building. Some HOAs restrict ground-mount systems entirely.
- Fixed-tilt systems are the standard for residential. Tracking systems (single-axis or dual-axis) produce 15 to 25 percent more energy but cost two to three times more for the racking. They are rarely worth the extra cost on residential jobs.
Template 3: Battery Storage Add-On Estimate
This template covers adding a home battery storage system to an existing or new solar installation. The example assumes one residential battery unit with a 13.5 kWh capacity.
Understanding Battery Storage Costs
Battery storage has become a popular add-on for residential solar customers, especially in areas with time-of-use electricity rates, frequent power outages, or reduced net metering benefits. The battery stores excess solar energy produced during the day for use at night or during grid outages.
The cost of battery storage has dropped significantly over the past five years, but it is still a major expense. A single 13.5 kWh battery with installation typically costs $12,000 to $18,000 before incentives. The federal ITC applies to batteries installed with solar systems (or standalone batteries as of 2023), which brings the net cost down by 30 percent.
The main cost variables are the battery brand and capacity, whether you need a critical loads panel (sub-panel for backup circuits), the complexity of the electrical work, and whether the battery is installed at the same time as the solar system or as a retrofit.
Equipment
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Battery unit (13.5 kWh, AC-coupled) | 1 | each | $8,500.00 | $8,500.00 |
| Battery gateway / transfer switch | 1 | each | $1,200.00 | $1,200.00 |
| Battery mounting bracket | 1 | each | $150.00 | $150.00 |
| CT clamps (current transformers) | 2 | each | $45.00 | $90.00 |
| Equipment Subtotal | $9,940.00 |
Electrical Materials
| Line Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Critical loads panel (sub-panel, 100A) | 1 | each | $250.00 | $250.00 |
| Wire (various gauges, THWN) | 100 | lin ft | $2.00 | $200.00 |
| Conduit (EMT, 3/4-inch and 1-inch) | 40 | lin ft | $2.25 | $90.00 |
| Conduit fittings | 1 | lot | $60.00 | $60.00 |
| Breakers (for critical loads panel) | 8 | each | $15.00 | $120.00 |
| AC disconnect (battery) | 1 | each | $65.00 | $65.00 |
| Grounding materials | 1 | lot | $75.00 | $75.00 |
| Labels and placards | 1 | set | $25.00 | $25.00 |
| Electrical Materials Subtotal | $885.00 |
Labor
| Task | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Install battery mounting and unit | 4 | hours | $85.00 | $340.00 |
| Install gateway / transfer switch | 3 | hours | $95.00 | $285.00 |
| Install critical loads panel | 4 | hours | $95.00 | $380.00 |
| Transfer circuits to critical loads panel | 3 | hours | $95.00 | $285.00 |
| Conduit and wire installation | 4 | hours | $85.00 | $340.00 |
| System programming and commissioning | 3 | hours | $100.00 | $300.00 |
| Utility notification and inspection prep | 1 | hours | $85.00 | $85.00 |
| Cleanup | 1 | hours | $50.00 | $50.00 |
| Labor Subtotal | $2,065.00 |
Permitting and Soft Costs
| Item | Quantity | Unit | Unit Cost | Total |
|---|---|---|---|---|
| Electrical permit (battery addition) | 1 | each | $150.00 | $150.00 |
| Plan revision / engineering update | 1 | each | $200.00 | $200.00 |
| Utility interconnection update | 1 | each | $50.00 | $50.00 |
| Permitting and Soft Costs Subtotal | $400.00 |
Summary
| Amount | |
|---|---|
| Equipment | $9,940.00 |
| Electrical materials | $885.00 |
| Labor | $2,065.00 |
| Permitting and soft costs | $400.00 |
| Direct Cost Subtotal | $13,290.00 |
| Overhead (12%) | $1,594.80 |
| Profit (15%) | $2,232.72 |
| Total Before Incentives | $17,117.52 |
| Federal ITC (30%)* | -$5,135.26 |
| Estimated Net Cost to Homeowner | $11,982.26 |
*The 30% federal Investment Tax Credit applies to battery storage installed with or without solar. Claimed by the homeowner on their federal tax return. Consult a tax professional.
Tips for This Template
- A 13.5 kWh battery provides about 10 to 12 hours of backup for essential loads (refrigerator, lights, internet, phone charging). It will not run an air conditioner or electric stove for long. Set realistic expectations with the customer about what the battery can and cannot power during an outage.
- The critical loads panel is where most of the labor time goes. You need to identify which circuits the homeowner wants on backup, move those circuits to the sub-panel, and verify everything works. Budget 3 to 4 hours for this on a typical home.
- If the battery is installed at the same time as the solar system, you save on permitting and electrical work because you are already there. Offer a discount for bundling to close the deal.
- Some states and utilities offer additional battery rebates on top of the federal ITC. Check your state’s DSIRE database for current incentives. Adding a $2,000 state rebate to your estimate can make the difference between a yes and a no.
- AC-coupled batteries are easier to retrofit to existing solar systems. DC-coupled batteries are more efficient but require a compatible hybrid inverter. Make sure you spec the right type for the situation.
Common Estimating Mistakes Solar Contractors Make
Solar estimating has more moving parts than most trades, which means more places to make errors. Here are the mistakes that cost solar contractors the most money.
Undersizing the electrical work. The conduit, wire, disconnects, and panel work add up faster than most installers expect. If you estimate electrical materials at $500 for a job that actually needs $1,200 in materials and an extra day of electrician labor, your margin is gone.
Forgetting permit and interconnection costs. Some jurisdictions charge $300 to $800 for solar permits. Utility interconnection fees vary from free to $200. Plan set reviews and engineering stamps add another $300 to $500. These soft costs can total $1,000 or more on a single job.
Not checking the electrical panel first. A 100-amp panel with no available breaker slots means a panel upgrade or supply-side tap. That is $1,500 to $3,000 the customer was not expecting. Check the panel during the site assessment, not after you have already signed the contract.
Using stale equipment pricing. Solar panel and inverter prices change quarterly. If your estimate template still has last year’s pricing, you could be $500 to $1,000 off on equipment alone. Update your distributor quotes every 60 to 90 days.
Overestimating production. Using best-case production numbers to justify a higher system price backfires when the system does not produce what you promised. Use conservative estimates based on actual site conditions, including shading, orientation, and local weather data.
Ignoring roof condition. If the roof needs replacement in the next 5 years, the customer should replace it before or during the solar installation. Installing panels on a failing roof means you will have to remove and reinstall them later, which costs $2,000 to $5,000. Mention this in your estimate if the roof is aging.
Not showing the incentive breakdown clearly. Homeowners want to see the price before incentives, the federal tax credit amount, any state rebates, and the final net cost. If your estimate just shows one lump number, the customer does not understand the value. Break it out line by line.
What Every Solar Estimate Needs Beyond the Numbers
Solar customers are making a 25-year investment. They want more information than a list of parts and prices. Include these details in every estimate:
- System specifications. Panel brand, model, wattage, and number of panels. Inverter brand and model. Total system size in kW DC and estimated kW AC.
- Production estimate. Expected annual energy production in kilowatt-hours based on the site assessment. Compare this to the customer’s current annual electricity usage.
- Financial summary. Total cost before incentives, federal ITC amount, state/local rebates, estimated net cost, and estimated payback period in years.
- Timeline. “Permit submission within 1 week of signed contract. Installation scheduled 4 to 6 weeks after permit approval. System activation 1 to 2 weeks after final inspection and utility approval.”
- Payment terms. “30% deposit at contract signing, 60% due at installation completion, 10% due at system activation.” Or financing terms if you offer third-party lending.
- Warranty details. Panel warranty (product and performance), inverter warranty, battery warranty (if applicable), and your workmanship warranty. List each one with the specific duration.
- Exclusions. “This estimate does not include roof replacement or repair, tree removal, main electrical panel upgrade (unless listed above), drywall or interior work, or landscaping restoration.”
- Expiration date. 30 days maximum. Equipment prices change and incentive programs can close.
How Projul Makes Solar Estimating Faster
Solar contractors juggle more variables per estimate than almost any other trade. Between equipment specs, electrical design, permitting costs, and incentive calculations, building a single estimate can take an hour or more in a spreadsheet. Multiply that by 10 or 15 leads per week and you are spending your entire sales team’s time on paperwork instead of closing.
Projul’s estimating tools are built for contractors who need speed without sacrificing accuracy:
- Saved equipment libraries. Build your panel, inverter, battery, and electrical component catalog once with current pricing. Pull items into any estimate with a few taps. When your distributor updates pricing, change it in the library and every future estimate reflects the new cost.
- Custom templates. Save your most common system configurations as templates. An 8 kW rooftop with microinverters, a 10 kW ground-mount, a battery add-on. Start from the template and adjust for the specific job instead of building from scratch every time.
- Mobile access. Complete a site assessment, open Projul on your phone, and send the estimate before you leave the customer’s driveway. Being first with a professional estimate gives you a real advantage in a competitive market.
- Estimate tracking. See when the customer opens your estimate, how long they spend reviewing it, and when they accept. Follow up at the right time with the right information.
- Change orders. Solar projects often have scope changes: adding panels, upgrading the inverter, adding a battery, or dealing with unexpected electrical work. Projul ties change orders to the original estimate so everything stays organized and documented.
- No per-user fees. Your sales reps, project managers, electricians, and office staff can all access Projul without increasing your monthly cost.
Projul Pricing
Projul offers three plans built for construction businesses of every size:
| Plan | Price | Best For |
|---|---|---|
| Core | See pricing | Small crews getting organized |
| Core+ | See pricing | Growing companies that need more features |
| Pro | See pricing | Established businesses running multiple crews |
All plans include estimating, scheduling, and job management. No per-user fees. No long-term contracts.
Frequently Asked Questions
Check the FAQ section above for answers to the most common questions about solar estimates, including cost per watt, what to include, installation timelines, how to handle the federal tax credit, and how to estimate production for a specific home.
Start Sending Better Solar Estimates Today
These templates give you a solid starting point for residential rooftop systems, ground-mount arrays, and battery storage add-ons. Customize them with your own equipment pricing, add your company branding, and start sending professional estimates that close more deals.
If you are ready to move beyond spreadsheets, Projul’s estimating features let you build, send, and track estimates from your phone. No per-user fees. Rated 9.8 out of 10 on G2. Schedule a live demo and see how it works for your team.
📥 Get Your Free Estimate Templates
Download Projul’s free construction estimate templates, built by contractors, for contractors. Create professional estimates in minutes and win more jobs.
DISCLAIMER: We make no warranty of accuracy, timeliness, and completeness of the information presented on this website. Posts are subject to change without notice and cannot be considered financial advice.
Frequently Asked Questions
How much does residential solar installation cost per watt?
What is included in a solar installation estimate?
How long does a residential solar installation take?
Should I include the federal tax credit in my solar estimate?
How do I estimate solar production for a specific home?
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