Back-contact cells with no front busbars — the best real-world performance in Australian summer heat.
Every other panel here uses TOPCon. LONGi uses back-contact cells, which moves the wiring behind the panel — no front busbars, a cleaner all-black face, and a lower temperature coefficient. On a 40°C Melbourne day, that difference shows up in your generation figures.
Themes summarised in our own words from verified owner reviews published on SolarQuotes. Ratings current at time of writing and may change as new reviews are added.
| Power | 440 – 475 W |
| Efficiency | Up to ~24% |
| Cell technology | HPBC 2.0 back-contact (N-type) |
| Product warranty | 25 years |
| Performance warranty | 30 years linear (Hi-MO X10) |
| Degradation | Under 1% year one, then 0.35% per year |
| Temperature coefficient | −0.26% / °C |
Hot-climate installs and homeowners who want the best summer yield and slowest long-term degradation without paying true premium prices.
Specs differ meaningfully between the Hi-MO 6 and Hi-MO X10 ranges, so confirm which is quoted. LONGi’s install manual requires panels to be sited at least 50 m from the beach, which rules them out for beachfront properties.
Get a free assessment with your rebate and exact price — we confirm the model, capacity and warranty in writing before anything is ordered.
