What is the physical difference between bifacial and monofacial panels?

Monofacial panels have solar cells on the front and an opaque white or black plastic backsheet on the rear. Bifacial panels have solar cells sandwiched between dual layers of tempered glass (or transparent backsheet), allowing light hitting the back surface to generate electricity.

Do bifacial panels degrade slower than monofacial panels?

Yes. Dual-glass bifacial modules are completely moisture-impermeable and resist PID (Potential Induced Degradation), resulting in an annual degradation rate of only 0.4% compared to 0.55% on standard monofacial backsheet panels, providing 30-year performance warranties.

Technology Battle

Bifacial vs Monofacial Solar Panels Pakistan 2026: Which to Choose?

Q: Is bifacial solar worth the extra money in Pakistan?

Yes, if installed on an elevated structure (5–8 ft high) over a light-colored, white-painted, or tiled rooftop. Under these conditions, the rear side generates 10% to 20% additional units per day, easily recovering the 5–10% price premium within 12 months. If installing flush on a flat dark roof or tin shed, monofacial is the better and cheaper choice.

By PSI Editorial · 7 min read · Updated September 2026

Bifacial dual glass vs monofacial solar panel installation in Pakistan — PakSolarInsights

Atomic Summary: Bifacial solar panels produce up to 20% more total energy than monofacial panels by absorbing reflected sunlight from their rear glass surface. In 2026 Pakistan, the price gap between the two has narrowed to just Rs. 2–4 per watt. If you are mounting on an elevated structure (over 5 ft) on a tiled or white roof, bifacial is the undisputed winner. For low flush mounting on metal roofs, stick with monofacial.

Direct Comparison: Bifacial vs Monofacial

Specification	Monofacial Panels	Bifacial Panels	Advantage
Active Generating Sides	Front side only	Front + Back (dual side)	Bifacial
Daily Yield per kWp	4.2 – 4.8 kWh / day	4.8 – 5.8 kWh / day (+15%)	Bifacial
Construction	Glass front + Polymer Backsheet	Dual Tempered Glass (2.0mm + 2.0mm)	Bifacial
Weight per 585W Panel	27.5 kg	32.0 kg (heavier)	Monofacial
Average Price / Watt (PKR)	Rs. 26 – 31 / watt	Rs. 29 – 34 / watt	Monofacial (Rs. 3 less)
Performance Warranty	25 Years (84.8% power)	30 Years (87.4% power)	Bifacial

When Should You Choose Monofacial Instead?

While bifacial is trending in Pakistan, monofacial panels remain the superior engineering choice in specific scenarios:

Industrial Tin Sheds / Slanted Metal Roofs: When panels are mounted flush against corrugated metal sheets (clearance under 10 cm), zero light reaches the back surface. Paying for bifacial glass delivers 0% extra gain.
Lightweight Roof Constraints: Dual-glass bifacial panels weigh 4–5 kg more per module. On older residential buildings or lightweight purlin trusses, monofacial reduces dead load.

Frequently Asked Questions

Is bifacial solar worth the extra money in Pakistan?

Yes. Because the price difference is only Rs. 2–4 per watt, an elevated installation generates 10–20% more electricity, paying off the small cost difference in less than one year.

Can bifacial panels break easily in hail?

No. In fact, dual-glass bifacial panels have 2.0mm tempered glass on both sides, making them significantly stronger and more resistant to hail and heavy wind loads than single-glass modules.