What a complete quotation should show
A useful quote spells out more than a dollar amount. Expect to see: system size (kW), number and type of panels, inverter type, expected annual production with assumptions, a site sketch showing panel placement, a timeline for permitting and installation, and a clear list of included services (inspection, interconnection paperwork, permit fees). The quote should also state whether any roof work is included and whether the company will handle the utility interconnection and paperwork. Remember: production estimates and final price depend on your roof orientation, shading, local rates, and chosen financing.
Fine print and fees people often miss
Look for upfront and recurring charges that may not be obvious. Examples to check: fees for site visits or system design changes, costs if your roof needs repair, charges for removing or replacing panels later, and any ongoing monitoring or maintenance fees. Also note contract cancellation terms and service transfer rules if you sell your house. If a quote includes a lease, power purchase agreement, or loan offer, ask for full contract language and any early-termination penalties. These items change the long-term picture even if the headline price looks low.
Equipment, warranties, and who actually installs
Don't just accept brand names—verify models and coverage. A good quote will list panel and inverter models and who makes them. It should say whether warranties are manufacturer-backed or provided by the installer. Ask who will perform the physical installation: the company that sold the system or a subcontractor? If the installer uses subcontractors, get their credentials and whether the lead company will remain responsible for warranty service. Production guarantees, if offered, should include clear measurement methods and remedies.
How to compare multiple quotes fairly
Use consistent criteria: compare system size (kW), estimated annual energy, price after incentives, and contract terms. Convert offers to a common basis—cost per watt can help, but pair it with the production estimate so you’re comparing expected output, not just price. Check timelines, who handles permits and inspections, and whether the company will manage the utility interconnection. Read sample contracts from each provider and flag any unclear clauses. When possible, ask each company to walk you through a line-by-line comparison so you can see what’s included or excluded.