Assessing Installer Credentials
Start by confirming that any contractor you consider holds a valid Massachusetts state license for electrical work and is certified by the North American Board of Certified Energy Practitioners (NABCEP). These credentials demonstrate compliance with safety standards and a baseline of technical competence.
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Comparing Pricing Models
Solar installers typically present three pricing structures: upfront purchase, solar lease, and power‑purchase agreement (PPA). An upfront purchase requires a larger initial outlay but maximizes long‑term savings and eligibility for the federal Investment Tax Credit (ITC). Leases and PPAs lower or eliminate upfront costs, but the homeowner pays a monthly fee or per‑kilowatt‑hour rate, which may increase over time.
Evaluating Service Scope
Look for firms that provide a full‑service package: site assessment, system design, permitting, installation, and post‑install monitoring. Some installers also handle utility interconnection and offer maintenance contracts, which can reduce future downtime.
Understanding Local Incentives
Barnstable Town participates in the Massachusetts Solar Renewable Energy Certificate (SREC) program. Installers familiar with the local application process can help you claim SREC revenue, which can offset system costs. Ask potential contractors how they incorporate SREC projections into their proposals.
Checking References and Reviews
Request at least three recent residential references and verify them through phone calls or online review platforms. Pay attention to comments about timeline adherence, workmanship quality, and after‑sale support.
Sample Comparison Table
| Attribute | Upfront Purchase | Lease | PPA |
|---|---|---|---|
| Initial Cost | High | Low/None | Low/None |
| Ownership | Homeowner | Installer | Installer |
| Tax Credits | Eligible | Not eligible | Not eligible |
| Monthly Payment | None (after loan) | Lease fee | Per‑kWh rate |