01 · Practical guidance
Start with the home and utility record
Collect at least twelve months of electricity use and cost. Document roof age, shade, orientation, structural concerns, electrical service, planned electrification, and utility interconnection rules. The Department of Energy notes that roof condition and solar potential should be evaluated before installation.
Verify
Collect the current price, terms, and constraints.
Compare
Put realistic alternatives on the same basis.
Act
Choose the next move and document the follow-through.
02 · Practical guidance
Normalize the technical proposal
Record DC system size, panel count and models, inverter type and models, estimated annual production, degradation, layout, monitoring, battery scope, and the assumptions behind projected savings.
- Compare complete cash price and price per watt.
- Separate roof, electrical, trenching, battery, and panel-upgrade work.
- Ask who handles permits, utility approval, inspections, and activation.
- Use an independent production tool such as NREL PVWatts as a reasonableness check.
03 · Practical guidance
Separate price from financing
Compare cash, loan, lease, and power-purchase options as different contracts. For financing, record principal, fees, rate, term, total payments, prepayment rules, payment changes, liens or security interests, and home-sale consequences. Do not assume an incentive belongs to you without verifying ownership and eligibility.
A strong decision is not just cheaper. It is complete, usable, documented, and ready to carry out.
04 · Practical guidance
Compare accountability
Verify licensing, insurance, references, workmanship coverage, equipment warranties, roof-penetration responsibility, production guarantees, service response, monitoring, and what happens if the installer or equipment company is unavailable.
Your action plan
Make the next move without reopening the research.
- Collect twelve months of utility records.
- Document roof and electrical readiness.
- Request multiple proposals on consistent assumptions.
- Normalize size, production, equipment, scope, and cash price.
- Compare financing separately from system value.
- Verify the installer, contract, warranties, permits, and utility process.
Questions people ask
Common questions, answered directly.
Is the lowest price per watt the best quote?
Not automatically. Equipment, production, roof and electrical scope, financing, warranties, installer quality, and contract responsibility also matter.
Should a quote offset 100 percent of my use?
That depends on roof potential, utility rules, future consumption, rates, budget, and design. Ask the installer to explain the chosen offset and assumptions.
Who receives solar incentives?
Ownership, location, timing, tax situation, and program rules matter. Verify eligibility with the responsible government, utility, and qualified tax professional when needed.
Primary resources
Verify availability and terms at the source.
Use these independent primary resources to confirm rules, availability, and current details: