Minimal degradation over 30 years
The module’s open-circuit voltage ranges from 53.70 V to 54.30 V under standard test conditions and 51.04 V to 51.61 V under nominal operating conditions. Short-circuit current varies between 15.13 A and 15.60 A, with a temperature coefficient of -0.26% per degree Celsius.
Longi states the module’s degradation is 1% in the first year, with an annual rate of up to 0.35% over 30 years. The company also claims its latest module improves per-watt energy output by 2% and, combined with HPBC 2.0, increases overall energy yield by up to 10% over competing TOPCon modules.
Installing Hi-MO X10 (660 W) panels on a 10,000 m² rooftop could produce 189,000 kWh more power per year than a 630 W TOPCon system, according to Longi’s estimates. This translates to an annual revenue boost of $15,700 and close to $370,000 over 30 years.