Efficiency Leaders
REC Alpha Pure (22.3%), SunPower Maxeon (22.8%), and Panasonic EverVolt (22.2%) lead in efficiency. Higher efficiency means more power from limited roof space.
Value Options
Canadian Solar, Qcells, and JinkoSolar offer excellent price-performance with 20-21% efficiency and strong warranties at 15-20% lower cost than premium brands.
Warranty Comparison
All major brands offer 25-year power warranties. REC and SunPower include 25-year product warranties. Most guarantee 85-92% output at year 25.
Performance Factors
Consider temperature coefficient, shade tolerance, and degradation rates. Bifacial panels add 5-15% production. Half-cut cells improve shade performance.
Written by
Promise Energy Team