Path-Q Solar
When is a professional production assessment worthwhile before buying a home with solar?
Answer
It is worthwhile when the system's age, records, condition, or actual output is uncertain and the result could affect price, financing, insurance, or whether you proceed. It is especially useful when the seller's production claims cannot be matched to monitoring data, bills, equipment records, or site conditions.
Key points
- Compare historical production with system size, orientation, shading, weather, and expected degradation.
- Check for inverter faults, unavailable monitoring, damaged modules, roof issues, and unresolved maintenance.
- A production assessment is different from an electrical safety inspection and may not identify every defect.
- Use the findings to negotiate repairs, documentation, price, escrow, or a condition of closing.
What it depends on
- Availability and reliability of production records
- System age, design, maintenance, and monitoring
- Roof and site conditions
- The financial importance of the system to the purchase decision
Risks and trade-offs
- The assessment costs money and may require access or testing.
- Past production does not guarantee future output.
- A general home inspection may not evaluate solar performance in sufficient detail.
Information you may need
- System design, equipment, warranties, and installation records
- Several years of monitoring or utility data where available
- Repair and maintenance history
- Contract, financing, insurance, and roof information
Your next step
What to do next
Before making the solar value part of the purchase decision, hire an independent professional with solar performance experience to review records and inspect the system.
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