The difference between companies that install with their own teams versus those that subcontract.
When you sign a solar contract, you're not just buying panels — you're buying 25 years of warranty support, monitoring, troubleshooting, and (eventually) panel cleaning, inverter replacements, and repairs. Who actually shows up to install the system, and who you can call when something goes wrong, matters more than most homeowners realize. The single biggest predictor of a good long-term solar experience is whether your installer uses in-house crews or subcontractors.
What "In-House" Actually Means
An in-house installer employs the people who design your system, the people who engineer it, and the people who climb on your roof — all on the same payroll. They share a project management system, they're trained the same way, and they're accountable to the same company. When something goes wrong, one entity owns the problem.
What Subcontracting Looks Like
Many large national solar companies are essentially sales organizations. They quote you, finance the deal, and then hand the actual installation off to a local subcontractor — often the lowest bidder. The subcontractor may have never met the salesperson, never seen the design, and has no skin in the long-term warranty relationship. If a roof leaks two years later, the sales company points to the sub, the sub points to the sales company, and you're stuck.
Red flag
Ask directly: "Are the people who will physically install my system employees of your company?" If the answer hedges or shifts to "partners" and "certified installers," assume subcontracting.
Why It Matters for Your Warranty
- Panel warranties (25 years) and inverter warranties (10–25 years) are only worth what the installer is worth — if the installer is gone, you're stuck dealing with the manufacturer directly
- Workmanship warranties cover the roof penetrations, racking, and wiring — these claims are far more common than panel failures
- Subcontracted crews are often hired job-by-job, with no continuity for follow-up service
- In-house crews can return for service calls without re-negotiating who pays the labor
Quality on Day One
In-house crews tend to do better work because they're trained on the same standards, supervised by the same managers, and held accountable to the company that sold you the system. Subcontracted crews are paid per job, so they're incentivized to finish fast — which is fine for the easy installs and bad for the complicated ones.
What to Look For
- A real local office and warehouse in San Diego County, not just a sales address
- W-2 employees doing the installation labor — not 1099 contractors
- NABCEP-certified installers on staff
- At least 10 years in business under the same ownership
- References from customers who've owned their systems for 5+ years
Bottom Line
Solar is a long relationship. The installer you hire today is the installer you'll call when an inverter fails in year 12. Pick a company with in-house crews, ask hard questions about who does the labor, and don't be impressed by national brand names — most of the best solar work in San Diego is done by local, mid-sized companies with their own employees.