Residential vs Commercial Solar Panels — Key Differences
Size and Wattage Differences
The primary difference between residential and commercial panels is physical size and wattage output:
| Feature | Residential Panels | Commercial Panels |
|---|---|---|
| Typical wattage | 400–450W | 500–600W |
| Dimensions | ~1,722 × 1,134 mm | ~2,278 × 1,134 mm |
| Weight | ~21 kg | ~32 kg |
| Cell count | 108 half-cut | 132–144 half-cut |
| Handling | One-person | Two-person |
| LONGi option | Hi-MO 6 (400–430W) | Hi-MO 7 (560–600W) |
When to Choose Residential-Size Panels
- Small to medium rooftops with access limitations
- Complex roof geometries requiring flexible layout
- Microinverter systems (typically rated ≤450W)
- Budget-priority projects using Mono PERC technology
When to Choose Commercial-Size Panels
- Large flat commercial rooftops
- Ground-mount installations
- Projects where reducing installation labour matters
- Maximum efficiency and latest N-type TOPCon technology
Cost Comparison
Commercial panels offer lower cost per watt (both panel and installation) due to fewer units needed. A 20 kW system requires 34 residential panels (590W) vs 47 panels (430W) — that is 13 fewer panels to mount, wire, and maintain.
Frequently Asked Questions
Can I use commercial panels on my house?
Yes, if your roof can accommodate their larger size (2.28m long). They require two people for installation and wider mounting rails.
Are commercial panels more efficient?
Yes, commercial panels often incorporate the latest technology first. LONGi Hi-MO 7 (commercial) at 22.8% efficiency outperforms Hi-MO 6 (residential) at 21.8%.
Which has a longer warranty?
LONGi Hi-MO 7 (commercial) offers a 30-year performance warranty vs 25 years for the Hi-MO 6 (residential).
Frequently Asked Questions
Can I use commercial panels at home?
Yes, if your roof accommodates their 2.28m length. They need two-person installation.
Are commercial panels more efficient?
Often yes. Hi-MO 7 (commercial) at 22.8% outperforms Hi-MO 6 (residential) at 21.8%.
Longer warranty?
Hi-MO 7: 30-year performance. Hi-MO 6: 25-year performance.
