Commercial Solar Panels

Commercial Solar Panels & C&I System Components at Wholesale

Buy commercial solar panels for sale at wholesale prices from Portlandia Electric Supply. We stock high-power modules and three-phase string inverters for warehouses, office buildings, retail centers, agricultural operations, carport and canopy structures, and ground-mount C&I projects — with volume pricing, project quotes, and fast nationwide freight.

Commercial solar pays back through reduced demand charges, the Section 48E commercial Investment Tax Credit (available for projects that begin construction through 2027), MACRS depreciation, and state and utility incentives. Our job is to make the equipment side simple: Tier-1 modules in stock, matched inverters, and freight that shows up on schedule.

Commercial Panels: 500W to 720W, 1000V & 1500V

Our industrial solar panels come from LONGi, JA Solar, Jinko, Trina, Canadian Solar, Qcells, Hyundai, VSUN, and ZNShine, in large-format 144-cell and 132-cell frames from 500W to 720W with efficiencies above 23%. Choose bifacial modules for ground-mount and carport arrays where rear-side gain adds 5–15% production, or monofacial glass-backsheet modules for rooftops. Most of our commercial modules are 1500V DC rated, cutting string count, combiner boxes, and BOS cost on larger systems. All panels carry IEC 61215/61730 certification and 25–30 year performance warranties. Container-load and pallet pricing is available — the per-watt difference is significant on 100kW+ projects.

Three-Phase String Inverters: 50kW to 350kW at 480V

A commercial array is only as bankable as its inverter. We carry 480V three-phase string inverters from 50kW to 350kW — Solis S5/S6 series, SolarEdge Synergy (66.6kW–120kW), Chint Power CPS (50–125kW, 1000VDC and 1500VDC), SMA Sunny Tripower CORE1, GoodWe SMT, Solectria, and Sungrow — plus commercial three-phase microinverters from APsystems and Enphase for module-level designs. For most C&I rooftops, distributed string inverters beat a single central unit: multiple MPPTs handle mixed tilts and azimuths, a failed unit costs you 10% of production instead of 100%, and no crane pad or concrete pad is required. Central inverters still win on utility-scale ground-mount above roughly 1MW — talk to us about the crossover for your project.

What a 100kW Commercial Solar System Looks Like

A typical 100kW commercial solar system pairs roughly 180–200 of our 550W modules with a single 100kW string inverter (Solis S5-GC100K, Chint SCH100KTL, or SolarEdge Synergy 100kW) or two 50kW units for redundancy, interconnecting at 480V three-phase. Scale the same recipe: 50kW for small retail, 250kW+ for warehouses and manufacturing. Need racking for a flat roof, carport, or canopy structure? We source the full balance of system — racking, rapid shutdown, combiners, and monitoring — so your BOM ships complete.

EPC Partner or Supply-Only — Your Choice

We work both ways. EPCs and developers use us as a supply house: wholesale module and inverter pricing, spec sheets and datasheets for permitting, and coordinated multi-pallet freight to your laydown yard. Business owners buying direct get the same pricing plus help matching panels, inverters, and racking, and an introduction to a vetted installer in your area if you need one. Either way, you get one accountable distributor instead of a broker chain.

Request a commercial project quote with your target system size, roof or site details, and utility voltage — we turn most quotes around within one business day.