Purpose of a 2019 Solar Installation Questionnaire
The questionnaire captures every detail needed to evaluate feasibility, size the system, and meet local code requirements, ensuring a smooth installation timeline.
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Site and Roof Information
Collect precise measurements and conditions of the installation area.
- Address and geographic coordinates
- Roof type (shingle, tile, metal, flat)
- Roof age, condition, and load‑bearing capacity
- Available roof area (sq ft) and orientation (N/E/S/W)
- Existing penetrations, skylights, or obstructions
Shading and Sunlight Exposure
Shade analysis determines expected energy output.
- Tree height and distance from roof
- Adjacent buildings or structures causing shading
- Seasonal shading patterns (summer vs. winter)
- Use of a sun‑path diagram or shading app for verification
Electrical System Details
Understanding the existing electrical setup is critical for inverter selection and safety compliance.
- Service panel size (amps) and available breaker slots
- Main breaker rating and location
- Existing load profile (major appliances, HVAC, EV charger)
- Utility voltage (120 V, 240 V, three‑phase) and phase type
Energy Usage and Goals
Accurate consumption data guides system sizing.
- Average monthly kWh usage (last 12 months)
- Peak demand periods and seasonal variations
- Desired offset percentage (e.g., 70 % of usage)
- Future load changes (adding EV, battery storage, expansions)
Permitting and Regulatory Considerations
Documenting local requirements prevents delays.
- Municipal building permits and application fees
- Utility interconnection agreement requirements
- Homeowners association (HOA) rules or historic district restrictions
- Incentive programs active in 2019 (rebates, tax credits)
Financial and Ownership Information
Financial data informs financing or leasing options.
- Budget range for system purchase and installation
- Preferred financing method (cash, loan, lease, PPA)
- Ownership status of property (owner, renter, landlord)
- Insurance coverage and any required policy updates
Sample Comparison Table
| Section | Key Data Points | Why It Matters |
|---|---|---|
| Site & Roof | Orientation, area, load capacity | Determines panel layout and structural safety |
| Shading | Tree height, adjacent structures | Impacts production estimates |
| Electrical | Panel size, breaker availability | Ensures code‑compliant inverter sizing |
| Energy Use | Monthly kWh, offset goal | Guides system size for ROI |