Free tool
Solar quote checker
Enter the numbers from an installer’s quote. We check the price per watt, the production estimate and the savings claims against published data and your utility’s actual rates.
Questions to ask every installer
- What is the total price and the price per watt (DC)? Does it include permits, electrical upgrades, the utility connection and any panel upgrade?
- Which panels and inverter (or microinverters) are proposed? What are the product, performance and workmanship warranties, and who honours them if your company closes?
- How did you estimate production? What shading, snow and inverter losses did you include?
- What electricity price, yearly price increase and export credit did you assume for the savings?
- Will you apply for the utility interconnection and any rebate pre-approval before work starts?
- Is my roof in good enough shape to last as long as the panels? What does removal and reinstallation cost?
Read more: How to evaluate a solar quote.