About LONGi Green Energy Technology
LONGi started as a silicon wafer maker and grew into one of the largest panel manufacturers in the world. It sells in Australia through distributors.
Its residential panels use HPBC, a back contact design. Because there are no metal fingers on the front of the cell, more of the surface catches light and the panels look uniformly black.
LONGi panels sold in Australia
| Range | Cell type | Notes |
|---|---|---|
| Hi-MO 6 | HPBC back contact | Marketed with a 30-year performance warranty in Australia |
| Hi-MO X6 | HPBC back contact | Listed with a 25-year performance warranty, about 89% at 25 years |
LONGi warranty in Australia
| Product warranty | 15 to 25 years, depending on the model and listing |
|---|---|
| Performance warranty | 25 years (Hi-MO X6) or 30 years (Hi-MO 6) |
| First year loss allowed | About 1 to 1.5% |
| Yearly loss after that | About 0.4% |
Check the certificate for your model
Warranty terms differ between models and change over time. Ask your installer for the Australian warranty document for the exact model on your quote, and register the product if the maker requires it.
LONGi strengths and trade-offs
Strengths
LONGi- High efficiency back contact cells
- All-black appearance
- Very large manufacturer
Trade-offs
Consider- Warranty terms vary between models and listings
- Product warranty on some models is shorter than rivals
Usually suits:
- Homes with limited roof space wanting more watts per panel
- Buyers who care about how the roof looks
Common questions
LONGi is one of the largest solar makers in the world, and its Hi-MO panels use efficient back contact cells. Check the warranty for the exact model, because terms vary.
Australian listings show a 25-year performance warranty with about 89% output at 25 years. The product warranty is listed as 15 or 25 years depending on the source, so confirm it with the certificate.
Hybrid passivated back contact. The electrical contacts sit on the back of the cell instead of the front, so more light reaches the cell and the panel looks evenly black.
Sources
Product and warranty details come from the manufacturer and its Australian warranty documents. Prices, where shown, are industry figures and named. Last checked October 2026. Prices include GST unless we say otherwise.