Bifacial solar panels work by harnessing sunlight from both sides of the panel. This is the claim made by the manufacturers of such panels. But those who have met any solar salesman know the claims which they make to be so many in number that being skeptical is natural.
Let’s get straight to the point. Are the bifacial panels really capable of producing significant amounts of energy in the conditions of India?
How Bifacial Generation Works ?
A standard monofacial panel captures only the sunlight hitting its front surface. A bifacial panel has a transparent rear – either dual glass or a clear backsheet – that also captures light reflected off whatever surface sits below: concrete, gravel, sand, or a white-painted rooftop.
This reflected light, measured as albedo, adds directly to the panel’s output. How much depends on the surface:
- White painted roof or light gravel: 25–35% albedo → significant rear gain
- Concrete or light soil: 15–25% albedo → moderate gain
- Dark asphalt or vegetation: 5–15% albedo → lower but still real gain
Well-installed bifacial systems across India typically see a 5–15% energy boost from the rear side. Ground-mount projects in reflective terrain regularly push toward 20%.
Why Indian Conditions Are Ideal for Bifacial?
Two things that are perfect for bifacial panels are the country’s high level of irradiance and long sunlight hours.
The states of Rajasthan, Gujarat, Madhya Pradesh, and Tamil Nadu fall within regions with some of the world’s highest levels of irradiance. Increased levels of irradiance mean increased reflection on the back of the module. It is a straightforward calculation in favor of bifacial.
The most ideal conditions for the use of bifacial would be ground mounting of the panels on light-colored soil and gravel-based grounds, which constitute the predominant condition in the areas of India that use solar energy. There are no hypothetical figures here, but actual figures from projects already in place.
Rooftop projects would be beneficial if conducted over light-colored surfaces.
Not All Bifacial Panels Are Equal – Why Powersphere’s Suryatop Stands Out ?
The rear-side gain is highly dependent on the bifaciality index, or what proportion of the efficiency generated by the front side will be gained by the rear.
The Powersphere Suryatop G12R N-Type TOPCon bifacial module reaches a level of 80% bifaciality. In comparison, the older P-Type bifacial panels typically perform at levels around 65–70%. Added to this base efficiency level of 23.51%, the overall energy gain is noticeable.
This particular model of the Suryatop bifacial module is specifically designed for ground-mounted installations and has a snow load tolerance of 5400 Pa, as well as wind resistance of 2400 Pa.
Installation Makes or Breaks Bifacial Performance
Bifacial panels underdeliver when the installation ignores rear-side irradiance:
- Mounting height – too close to the surface blocks reflected light; 300–500mm clearance is a standard baseline
- Row spacing – tight rows in ground-mount shade the rear of modules behind; inter-row spacing needs to be calculated for bifacial yield, not just front-side shading
- Surface albedo – light-coloured surfaces or reflective ground cover beneath the array significantly improve rear-side gain
Powersphere’s technical team supports project design for bifacial optimization – not just module supply. For serious deployments, that guidance is part of the value.
Is the Price Premium Still a Real Concern?
Largely, no. The cost gap between monofacial and bifacial has narrowed dramatically as bifacial has become the dominant format across large manufacturers globally. For most commercial and utility projects in 2025, bifacial N-Type TOPCon is simply what a quality module looks like – not an optional upgrade.
The better question is why you’d accept a monofacial panel when bifacial delivers more energy from the same footprint, at a price that’s barely different.
With Powersphere’s Suryatop, the answer becomes clearer still: 80% bifaciality, 23.51% efficiency, Indian manufacturing, and a 30-year warranty. That’s not a pitch – it’s a specification.
Frequently Asked Questions
In Indian conditions, well-installed bifacial solar panels typically deliver 5–15% more energy than equivalent monofacial panels, with ground-mount systems on reflective terrain reaching up to 20% gain. Powersphere’s Suryatop bifacial modules achieve up to 80% bifaciality, placing them at the upper end of rear-side efficiency among available options.
Yes, particularly where the rooftop surface is white or light-coloured. Bifacial panels mounted with adequate clearance above a reflective surface can see meaningful rear-side gains even on rooftops. Powersphere offers the Suryatop in M10 bifacial format suitable for residential and commercial rooftop use.
The bifaciality factor measures how efficiently a panel captures light from its rear side, expressed as a percentage of its front-side efficiency. A panel with 80% bifaciality (like Powersphere’s Suryatop) captures significantly more rear-side light than one with 65% bifaciality. Higher bifaciality directly translates into more energy per panel over the system’s lifetime.
The Suryatop G12R is Powersphere’s large-format N-Type TOPCon bifacial module, designed for utility-scale and commercial ground-mount solar projects. It uses 230mm G12R cells, achieves 23.51% efficiency, and is structurally rated for 5400 Pa snow load and 2400 Pa wind load – making it suitable for long-term deployments in demanding Indian field conditions.
No special inverter is required for bifacial panels – they connect to standard string or central inverters. However, mounting structures should allow adequate clearance beneath the module (typically 300–500mm minimum) to maximise rear-side light access. Row spacing in ground-mount systems should also be planned with bifacial yield in mind, not just front-side shading ratios.
