Commercial Solar Panel Output Chart (2026)
Compare commercial solar panel classes by wattage and efficiency, with energy per kW by region and pallet math for C&I buyers.
Commercial and utility projects buy panels by the pallet and container, so the comparison that matters is module class: wattage, efficiency, and whether the backside harvests reflected light. This chart covers the module classes PES Supply stocks for C&I projects in 2026.
| Module class | Typical output | Efficiency | Best use |
|---|---|---|---|
| Mono PERC / TOPCon, 66-cell | 500–550 W | 21.0–21.5% | Rooftop C&I where area is fixed |
| Bifacial TOPCon, dual-glass | 570–585 W | 22.0–22.5% | Ground mount and trackers (+5–15% rear-side gain) |
| Large-format bifacial | 600–640 W | 22.3% | Utility ground-mount, single-axis tracking |
| Utility-scale TOPCon | 660–720 W | 22.5–23% | Utility scale and carports with structural capacity |
Higher wattage per module cuts BOS cost per kW — fewer rails, clamps, and labor hours — but check ballast and racking loads before upsizing format.
| Site | Peak sun hrs/day | kWh per kWp per day | kWh per kWp per year |
|---|---|---|---|
| Pacific Northwest | 3.5–4.0 | 3.3–3.8 | 1,200–1,400 |
| Midwest / Ohio Valley | 4.0–4.6 | 3.8–4.4 | 1,400–1,600 |
| Middle Atlantic | 4.2–4.8 | 4.0–4.6 | 1,450–1,680 |
| Southwest | 5.5–6.5 | 5.2–6.2 | 1,900–2,260 |
Bifacial modules add 5–15% on ground mounts with light-colored surfaces; add snow and soiling losses for your site before quoting production.
Standard C&I logistics: roughly 30–36 modules per pallet, and 27–30 pallets per 40-ft container. A 100 kW array at 580 W per module is ~172 modules — about five pallets. We quote freight per pallet to commercial docks; live wholesale $/W is updated weekly on our solar panels collection, so the number you see there is the number you pay.
Are bifacial panels worth it on a rooftop?
Usually not — roofs give the backside nothing to reflect. Bifacial pays on ground mounts, trackers, and carports.
TOPCon vs PERC for commercial?
TOPCon delivers ~0.5–1 point higher efficiency and better low-light behavior; at 2026 wholesale prices it is the default for new C&I designs.
Solar prices just dropped
1,900+ panels repriced this week — N-type TOPCon and bifacial modules at wholesale, volume pricing for C&I projects.
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