Rooftop Solar Area Checker
Draw your rooftop on Google Maps to measure available area, instantly estimate maximum installable solar capacity, and see projected annual generation.
A 1 kW solar system needs about 50–65 sq ft of shadow-free roof — draw your roof below to see your exact capacity.
Rooftop Solar Area & Capacity Checker
Measure your roof on satellite map or calculate required area for your desired system size.
Loading Satellite Map View…
Ensure your Google Maps API key is configured at the top of the file.
If you see a RefererNotAllowedMapError in the browser console, authorize your local development URL in Google Cloud:
- Open Google Cloud Console → APIs & Services → Credentials
- Click your API Key
- Under Set application restrictions, choose Websites
- Add authorized URLs:
http://localhost:4321/*andhttp://localhost:*/* - Save changes (takes 1-2 minutes to apply)
You can also use the 📐 Area → Capacity or ⚡ Required Area for kW calculator tabs above directly.
Deducts area for water tanks, staircases, parapet shadows, and maintenance walkways.
Calculate Required Rooftop Area for Your Target System Capacity
Enter your target solar system size (kW) to find the minimum shadow-free rooftop space and structural clearance needed.
Example: an 800 sq. ft. south-facing rooftop can fit an estimated 8.6 kW system (16 panels), generating ~12,900 units/year and saving ₹96,750/year. Draw your roof or enter your own area above.
Showing an example — draw your roof or enter your own area above.
Rooftop Structural Loading & CAD Feasibility Pack
Engineering dead weight estimates, inter-row shadow spacing, and pre-installation CAD survey checklist.
Panels (~11 kg/m²) + HDGI Structure (~5 kg/m²). Safe for standard RCC slab.
Zero winter solstice (Dec 21, 9 AM - 3 PM) shadow overlap.
Mandatory clearance for module cleaning and inverter access.
10-Point Pre-Installation Engineering Survey Checklist
Ready to generate a formal client proposal?
Attach this rooftop layout and BOM into a complete 8-page customer quote with our Solar Quote Generator.
The Operating System for Indian Solar EPCs · solarops360.com
Rooftop Solar Area & Structural Feasibility Dossier
Satellite Shadow-Free Area Layout, Solar Capacity Potential, Dead Load Analysis, and CAD Feasibility Checklist
| Engineering Parameter | Calculated Value | Design Rationale & Clearance Criteria |
|---|---|---|
| Usable Shadow-Free Roof Area | 0 sq.ft (0 sq.m) | Effective area after deducting water tanks, staircases, parapet shadow, and walkways |
| Gross Rooftop Footprint | 0 sq.ft (0 sq.m) | Total physical roof boundary area mapped on satellite map / measured |
| Estimated System DC Capacity | 0 kW | Sized based on standard Indian irradiation density of 60–65 sq. ft. per kW |
| PV Module Count & Technology | 0 Nos | Tier-1 ALMM listed high-efficiency solar modules |
| Annual Clean Electricity Generation | 0 kWh | Estimated generation @ 4.1–4.4 Peak Sun Hours (PSH) per day (1,500 kWh/kW/yr) |
| Estimated Annual Utility Bill Savings | ₹0 / year | Based on standard blended grid tariff of ₹7.50/kWh |
| 25-Year Carbon Offset (CO₂) | 0 Tonnes CO₂ | Equivalent to planting hundreds of mature trees over 25-year plant lifecycle |
PV Panels + HDGI Structure. Fully compliant with standard RCC slab load limits.
Zero winter solstice (Dec 21, 9 AM - 3 PM) inter-row shadow obstruction.
Mandatory clearance perimeter for module robotic/manual cleaning.
How This Calculator Works
- 1
Search your address
Type your property address in the search box. The map will zoom to your location using Google Maps satellite view.
- 2
Draw your rooftop
Click the polygon drawing tool and click along the edges of your usable rooftop area to mark the shadow-free installation zone.
- 3
View area and capacity
The tool instantly calculates the marked area in sqft and sqm, the maximum installable solar capacity in kW, and estimated annual generation in kWh.
- 4
Or enter area manually
No Maps access? Use the manual input to enter your rooftop area in sqft directly and get the same capacity estimate.
- 5
Book a site assessment
Click "Get a Free Site Assessment" to have a SolarOps360 partner engineer visit your site, verify measurements, and give you a detailed feasibility report.
Rooftop Sizing & Structural Guidelines
Standard Sizing Ratio
For every 1 kW of solar capacity, you need approximately 60 to 65 sq. ft. of shadow-free rooftop area.
Roof Load Capacity
Standard solar arrays weigh approximately 15–20 kg/sq.m., which is well within standard RCC rooftop load design parameters.
Row Spacing & Maintenance
Always maintain a 2 to 3 ft. pathway between panel rows for regular cleaning and maintenance access.
Frequently Asked Questions
How much rooftop area is needed for a 1 kW solar system?
How do I calculate how much solar I can fit on my rooftop?
What percentage of rooftop area is usable for solar installation?
Does rooftop orientation affect solar system capacity?
What is the minimum rooftop area needed for solar panels in India?
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