What Solar Installers Do

Welcome

Hello, and welcome. This is Super Structures General Contractors — a national general contractor headquartered in Powhatan, Virginia — here to help you and your clients build something that lasts. We're glad you're with us, and we look forward to connecting with you.

Alright, What Solar Installers Do. Don't let the plain title fool you. Here's the part that actually matters on the job: Solar installers build the photovoltaic systems that turn sunlight into usable power — a trade that blends roofing, structural, and electrical work on everything from a single-family rooftop to a utility-scale field. Learn it well and you'll understand why solar crews are working in every kind of market, in every kind of weather, on every kind of building.

A photovoltaic (PV) installer mounts the modules, builds the racking that holds them, runs and connects the wiring, sets the inverter and disconnects, and ties the system into the building's electrical service and the utility grid. The work is governed by the National Electrical Code (NEC), the building and fire codes, the manufacturers' instructions, and the utility's interconnection rules, and it is inspected like any other electrical and structural work.

Where solar installers work

• Residential rooftop — the largest number of crews. Shingle, tile, and metal roofs, a few dozen modules, a string inverter or microinverters, and a tie-in at the main panel.
• Commercial and industrial rooftop — low-slope roofs on warehouses, schools, and retail, often with ballasted racking, larger inverters, and three-phase connections at switchgear.
• Ground-mount and utility scale — arrays on driven piles or concrete piers, from a backyard ground mount to a solar farm with trackers and central inverters built by large, production-style crews.
• Battery energy storage — batteries paired with PV for backup and self-consumption, governed by NEC Article 706 and listed to UL 9540.
• EV charging — many solar contractors also install electric vehicle supply equipment under NEC Article 625.
• Operations and maintenance (O&M) — inspecting, troubleshooting, and repairing systems already in service.

A day in the trade

A residential crew starts with the plan set approved by the building department: a site plan showing module layout and fire-code pathways, a one-line electrical diagram, an attachment detail, and the equipment list. The crew stages ladders and fall protection, locates rafters, installs flashed attachments and rails, sets modules, manages the DC wiring, mounts the inverter and disconnects, runs conduit to the service, and labels everything. A licensed electrician performs or supervises the electrical connections where state law requires it. The job closes with commissioning tests, the building and electrical inspection, and the utility's permission to operate (PTO).

The skills

Comfort working at height; reading plan sets and one-line diagrams; roofing fundamentals (finding structure, flashing a penetration); mechanical assembly to a torque specification; DC and AC electrical theory and safe work practices; using a multimeter, clamp meter, and torque wrench correctly; and the discipline to follow manufacturer instructions, because the equipment listing depends on it.

Going Deeper (Intermediate)

Solar is a team trade: the site surveyor measures the roof, shade, and electrical service; the designer produces the plan set and string sizing; the installer and lead installer build the array; the electrician makes the connections; and the project manager handles permits, the utility, and the inspector. Smaller companies combine roles; larger ones specialize.

The trade also sits between two established trades, and that matters legally. In most states the AC interconnection, and often all of the wiring, is electrical work that requires a licensed electrician or electrical contractor. The roof penetrations and flashing are roofing work that can void a roof warranty if done badly. An installer who understands both trades is worth more than one who understands only modules.

Advanced / Pro-Level

Pros understand the whole lifecycle: a system designed around the roof's remaining life, the panel's capacity, and the utility's rules goes in once and runs for decades; a system designed only to hit a kilowatt number gets redesigned at inspection or torn off when the roof is replaced. They know module-level power electronics (MLPE) — microinverters and DC optimizers — changed the trade by simplifying rapid shutdown and shade tolerance, and they can explain when a string inverter is still the right call.

From the general contractor's side, a solar scope touches the roofer (warranty and sequencing), the electrician (service capacity and point of connection), the structural engineer (dead load and wind uplift), and the fire marshal (roof access pathways). The GC who coordinates those four early avoids the change order later.

Practice Challenge

A GC is building a new home and the owner wants solar. The roofer is scheduled next week and the solar sub after drywall. Name three coordination items to settle before the roofer starts. (Answer: the attachment method and whether flashings go in with the roofing so the roof warranty survives; a conduit path or chase from the roof to the electrical room while the walls are open; and confirmation that the service panel and main breaker leave room for the interconnection under NEC 705, plus structural confirmation that the trusses can take the array's dead load.)

In Practice

A solar crew that reads the plan set, finds every rafter, and labels every conductor passes the inspection and gets PTO the first time. A crew that treats the job as "bolt down the panels" gets a correction list and a callback when the roof leaks.

Common Mistakes to Avoid

• Assuming solar is only a roofing job or only an electrical job — it is both, and it is inspected as both
• Working outside the scope your state's electrical licensing allows
• Installing without the approved plan set and the equipment's listing instructions
• Ignoring the roof's remaining life, which decides when the array will have to come off

Takeaway: Solar installers build the photovoltaic systems that turn sunlight into usable power — a trade that blends roofing, structural, and electrical work on everything from a single-family rooftop to a utility-scale field.

Educational overview only — not hands-on installation or electrical training, a safety program, or a substitute for work under a licensed electrician or NABCEP-certified professional. Follow the NEC as adopted in your jurisdiction, the building and fire codes, OSHA, the manufacturers' instructions, and your utility's interconnection requirements.