Solar
Engineer

A permit and construction package for the array. That means site and array layout, module and inverter selection, string sizing, and single line and three line diagrams. It also means conductor and overcurrent protection sizing, grounding, labeling, equipment schedules, and the attachment details for the mounting system. Ahead of that sits the feasibility work: shading analysis, production modeling, and an energy estimate built from the site's own consumption history. After it comes the utility interconnection paperwork. The engineer works as a named member of your team, on your templates and your sheet standards. The design is reviewed and sealed by your own licensed engineer. Residential, commercial rooftop, ground mount, and carport layouts are all in scope. Where the array loads a roof beyond its original design, the structural review runs alongside a structural engineer rather than being assumed away.

Yes, and it is one of the first tasks firms hand off. It is procedural work that stalls a project whenever nobody on the team has time for it. The engineer prepares the single line diagram, the equipment specifications, the site plan, and the application package in the format the utility requires. When comments come back, they handle the resubmittal. Interconnection rules are set by each utility and by the state commission, on top of the technical requirements in IEEE 1547 for distributed energy resources. So the package is built against that specific utility's current rules rather than a generic template. Filing, correspondence with the utility, and the commitments made in the application stay with your firm. We produce the documents, you own the relationship. Compare the hours this consumes today against what the same package costs to produce remotely.

The National Electrical Code is the core of it. Article 690 covers photovoltaic systems and Article 706 covers energy storage, both published by the NFPA and adopted with amendments state by state. Structural loading follows the building code and ASCE 7 for wind and snow on the array. Fire access and setback requirements come from the International Fire Code and from local fire marshal rules. Rapid shutdown, labeling, and disconnect requirements draw the most inspection comments, so they are worth checking early rather than late. Interconnection adds IEEE 1547 and the utility's own technical requirements. We screen candidates for experience in the code cycle your jurisdiction has actually adopted, which is often a version or two behind the newest one. Federal incentives change independently of the codes, and the U.S. Department of Energy publishes the current picture.

Most jurisdictions require a licensed professional engineer to seal the structural and electrical drawings for anything beyond a small residential system. That seal comes from your side. Licensure among the engineers we place varies by person and by country. Ask for each candidate's status while you are qualifying them. What firms use them for is the analysis, calculations, layout, and drawing production that a licensed engineer then reviews and seals. That keeps the licensed staff you already pay for on review rather than on production. We do not stamp drawings. We do not represent anyone as licensed in the United States, and we do not pursue permits on your behalf. If your deliverable requires a licensed engineer at a specific step, say so up front and we match the team to it.

Usually yes, because storage and EV charging are electrical scope built on the same single line diagram. Battery storage adds sizing against the load profile, inverter and battery selection, and protection coordination. It also brings the requirements of NEC Article 706, plus the fire separation and ventilation rules that apply to the enclosure. EV charging adds service capacity analysis, panel and feeder sizing, a load management strategy, and the charger layout itself. On commercial projects the added demand often forces a service upgrade study. That study is worth running before the array layout is fixed, not after the roof plan is done. Where the scope grows past what one person can carry, the engineer works alongside the broader MEP team on the same project. Introducing a second vendor mid-design is what usually breaks the coordination.