Low-Light Solar Boost: How 2025 PV Modules Are Delivering Higher Winter Efficiency | SolSetu
Low-Light Solar Boost: How 2025 PV Modules Are Delivering Higher Winter Efficiency
India’s winter months bring shorter days and more frequent low-light conditions — historically a challenge for rooftop solar owners. But in 2025, PV manufacturers have introduced low-light optimized solar modules built with enhanced cell architecture, improved anti-reflective coatings and bifacial gains that boost energy yield even on cloudy days.
Why low-light performance matters
Winter generation dips can increase grid dependence and reduce annual solar ROI. Technologies like half-cut cells, larger wafer formats, multi-busbar (MBB) designs and bifacial rear-side gain help maintain output when sunlight is diffused.
Who benefits most
- Homes in northern and northeastern states with foggy mornings
- Schools and offices with high morning energy loads
- Commercial rooftops facing seasonal shading issues
- Cold-climate hill regions with lower irradiation
What to ask vendors in 2025
Buyers should request module low-light performance curves, bifacial gain estimates, LID (light-induced degradation) control certifications, and performance reports from similar rooftops.
Cost vs. performance
Low-light optimized modules cost slightly more — typically 3–7% above standard mono-PERC panels — but offer faster payback in regions with winter shading, fog or early-morning consumption peaks.
