Two Digit Higher Solar System Output with Bifacial Technology

Bifacial system performance test shows 11.27% higher average energy yield than the monofacial system

Solar developers and PV power plant operators are primarily looking at the lowest possible cost of electricity generation (LCOE) - and bifacial technology is the perfect means to increase the power output gain at the system level without any additional cost as high-efficiency monocrystalline PERC solar cell technology is bifacial by nature. Depending on the reflection capabilities of the ground on which a bifacial system is installed (so called albedo), it can generate a 10 to 30% higher yield than a traditional monofacial solar system.


As there are only few bifacial systems that have been operating for longer periods, and even more, installed at the same site as monofacial systems, LONGi Solar, the leading vertically-integrated manufacturer of monocrystalline PV modules, has started in 2017 to build and test bifacial system performance in comparison to traditional monofacial module technology under real-life conditions.

Higher Yield for Bifacial Mono

A 18.9 kW PV system using its 350 W Hi-MO2 bifacial modules and a 18.48 kW system using standard monocrystalline modules with a power rating of 280 W were both installed using fixed ground-mount systems on dry soil in Pucheng, China. After the first 3 months of testing, the bifacial module showed already a 11.27% higher average energy yield than the monofacial system.

Mono Beats Multi - with Trackers Propelling Bifacial Advantage

To test the effect of tracking systems on the performance of bifacial solar technology and compare mono- and multicrystalline cells, a 336 kW PV system using LONGi's Hi-MO2 PERC bifacial modules was installed next to a 5 MW system using multicrystalline modules - both on single axis trackers. After the first 3 months at the test site in Kubuqi, China, the monocrystalline PERC module based bifacial system showed a 15% higher energy yield compared to a PV system with multicrystalline module.

Conclusions

The initial test results of LONGi Solar clearly indicate that opting for monocrystalline PERC bifacial technology is a simple way to improve system yield by a 2-digit amount and thus reduce costs of solar energy generation. LONGI Solar will continue to monitor bifacial system technology and will install further test systems in the future.

Featured Product

sonnenBatterie eco

sonnenBatterie eco

Sonnen's mission is to provide clean and affordable energy for all. As the first mainstream grid tied residential energy storage company in the world and with 24,000 sonnenBatterie systems installed worldwide, sonnen is a proven global leader in intelligent energy management solutions. The all-in-one sonnenBatterie smart energy storage solution easily integrates with new and existing solar installations to help homes manage their energy throughout the day-saving money, providing backup power, and maximizing the effective use of solar power day and night. Sonnen has won several awards for its energy innovations, including the 2017 Zayed Future Energy Prize, MIT's Technology Review's 50 Smartest Companies in 2016, Global Cleantech 100 for 2015-2017, Greentech Media's 2016 Grid Edge Award for Innovation, and Cleantech's 2015 Company of the Year Award in both Israel and Europe.