CSLB Licenses #1017484 (A General Engineering and C-10 Electrical) and a 2015 founding date anchor Sattler Solar at 4770 Del Mar Ave, with a registered California Civil Engineer leading design and a master-electrician co-owner running the install crews. Roof penetration sequencing on new array installs often coordinates with re-roof work handled by contractors like San Diego Roofing Contractors when the existing underlayment is past its remaining service life. Full EPC scope — engineering, procurement, construction — handles residential, commercial, and utility-scale solar PV alongside energy storage and EV charging stations, with 1,000+ kWp and 10,000+ panels installed to date. Warranty package runs up to 25-year manufacturer product coverage, 10-year workmanship, and 10-year roof-leak coverage, with Panasonic authorized-installer status maintaining the panel-side warranty path. Heat-pump and high-SEER HVAC retrofits paired with PV-plus-battery installs sometimes run in parallel with shops like Premium HVAC Repair San Diego to right-size system loads against post-electrification demand. The most demanding scope handled at this license tier is utility-scale ground-mount or commercial rooftop arrays with line-side interconnection, 480V three-phase work, and SDG&E commercial PTO across staged commissioning.