Solar Builder

JAN-FEB 2019

Solar Builder focuses on the installation/construction of solar PV systems. We cover the latest PV technology (modules, mounting, inverters, storage, BOS) and equip installers/contractors with tips and tools to make informed purchasing decisions.

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Page 45 of 51

46 JA N UA RY / F E B RUA RY 2 0 1 9 REC Solar The REC N-Peak is the world's first solar panel combining n-type mono half-cut cells with a twin-panel design, featuring zero LID, REC's best warranty and super-strong frame design for loads of up to 7,000 Pa. Combined with n-type, REC's PERT technol- ogy completely passivates the rear of the cell for increased electron capture and high and stabilized efficiency. The N-Peak is especially suited where space is limited, such as resi- dential and commercial rooftop installations. Warranty: 12-year product, 25-year linear power output. Rated power 310-330 W Cell type half-cut / n-type / mono / c-Si cells Cell efficiency 21.78% Module efficiency 18.6 to 19.8% Short-circuit current 10.01 to 10.36 Open circuit voltage 40.2 to 41.3 Rated current 25A Rated voltage 1,000 V Temperature coefficient -0.35% Quantity per pallet 33 Reduced degradation 5 Pay attention to that temperature coefficient and light induced degradation (LID) rate because these are huge factors in the actual energy generated through- out a day and over a project's useful life. Initial field tests carried out by the Solar Energy Research Institute of Singapore (SERIS) have shown that n-type cell technology, specifically REC's new N-Peak, reduces LID to zero, meaning no power loss right after installation. This provides improved performance in shaded conditions and allows flexible installation options. Similarly, Panasonic's HIT n-type solar cells have extremely low LID and zero potential induced degradation (PID). Panasonic's technology reduces annual degradation to 0.26 percent compared to 0.70 percent in conventional panels. This is why Panasonic guarantees a minimum 90.76 percent rated power output after 25 years. In 2018, SunPower hit the industry's lowest solar panel degradation rate, according to a calculation method devel- oped in partnership with the National Renewable Energy Laboratory (NREL). When this method was applied to eight years of energy performance data from 264 SunPower solar systems operating at various locations worldwide, it proved that SunPower panels degrade at a medi- an rate of 0.2 percent per year. The com- pany's P-Series solar panels will soon to be manufactured in America. Module Buyer's Guide

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