Unlike trades where overtime is the dominant income lever, solar installation's biggest pay differentiator is which segment of the industry you work in — residential, commercial, or utility-scale — plus whether you hold credentials that unlock premium work. Here's the honest breakdown.
The Project-Type Lever
As covered in the full residential-vs-utility-scale comparison (the full breakdown), utility-scale and commercial work consistently out-pay residential installation, sometimes significantly. This is the single biggest lever a solar installer controls directly — more impactful for most installers than overtime hours within a given project type.
Per Diem: Real Money on Larger Projects
Utility-scale and larger commercial projects, especially those requiring travel away from an installer's home base, commonly include per diem payments for lodging and meals on top of wages — similar to traveling work in electrical and other construction trades. For installers willing to travel for utility-scale projects, this can meaningfully boost total compensation beyond the base wage difference alone.
The base wage gap between residential and utility-scale solar work is real. Add per diem on top of it for traveling utility-scale crews, and the total compensation gap widens further still.
The Credential Premium
NABCEP PVIP certification and an electrical license both function as real, quantifiable pay levers — particularly for accessing the higher-paying commercial and utility-scale segments, which often specifically seek credentialed installers for more complex system design and interconnection work (the certification case, the licensing reality).
Career Implication
For installers prioritizing income growth, the most reliable path isn't waiting for overtime opportunities within residential work — it's deliberately building toward NABCEP certification and pursuing utility-scale or commercial opportunities, where both the base pay and the per diem/travel-premium structure are stronger.
Side Work: A Genuinely Complicated Picture
The classic "can I do side jobs" question gets complicated fast in this trade specifically, because of the licensing patchwork covered elsewhere (the full reality). Key considerations:
- If your state requires an electrical license for wiring/interconnection work, unlicensed side work involving that scope carries the same legal exposure as unlicensed electrical side work generally — a real risk, not a technicality.
- Racking and mounting-only side work may face fewer licensing barriers in some states, but liability and insurance considerations still apply — a poorly installed racking system that leads to a roof leak or, worse, a structural failure carries real personal liability without proper insurance.
- Given how young this industry is, the regulatory and insurance landscape around independent/side solar work is less mature and less standardized than in older trades — worth researching your specific state's rules directly rather than assuming based on how another trade handles it.
- Confirm your state's specific licensing requirements for the exact scope of work you're considering (the state guide).
- If electrical licensure is required for any part of the work, treat that requirement with the same seriousness the electrical trade does.
- Insurance matters regardless of licensing status, given real property-damage exposure (roof leaks, structural issues) if work goes wrong.
Reliable income growth in this trade, in order: build field competence → earn NABCEP certification → pursue commercial/utility-scale opportunities specifically → consider an electrical license if the state licensing structure rewards it. Project-type choice and credentials matter more here than overtime hustle alone.