21 August 2026
Bifacial solar panels generate electricity from both sides of the module. The front side captures direct sunlight, and the rear side captures light reflected from the ground, roof, or surrounding surfaces. In 2026, well-designed bifacial installations deliver 5 to 25% more energy than equivalent monofacial systems, making them the technology of choice for utility-scale projects, commercial ground mounts, and C&I rooftops with reflective surfaces.
The best modern bifacial modules combine N-Type TOPCon cells with glass-to-glass construction and a bifaciality factor of 80% or higher. For what they cost, see our bifacial solar panel price guide. This guide explains how bifacial solar panels work, the engineering behind glass-to-glass modules, real-world yield gains, TOPCon vs Mono PERC bifacial comparisons, and when the price premium is worth it.
For how bifaciality, albedo and mounting height decide the yield gain you actually get on site, see our guide to TOPCon bifacial solar panels.
The meaning of bifacial solar panels is simple: unlike traditional monofacial panels that generate power from one side only, bifacial modules produce electricity from both the front and rear surfaces. Both sides use active photovoltaic cells, and the rear side captures reflected sunlight (called albedo) from whatever surface sits beneath or behind the module.
Bifacial technology is not new. Rear-side generation has been studied since the 1960s, but only became commercially viable around 2018 when the industry solved cost and manufacturing challenges. In 2026, bifacial modules represent an estimated 30 to 40% of new utility-scale installations globally, with adoption accelerating rapidly in India.
The typical modern bifacial solar panel combines:
The structure of a bifacial solar panel differs meaningfully from a traditional monofacial module. Where a monofacial panel uses tempered glass on the front and a polymer backsheet on the rear, a bifacial glass-to-glass module uses tempered glass on both sides, with the solar cells sandwiched between two glass layers with encapsulant.
The benefits of glass-to-glass construction go beyond just enabling bifacial generation:
The tradeoff is added weight (10 to 15% more than monofacial), which requires slightly stronger mounting structures.
Bifacial solar panels work through two simultaneous mechanisms. Front-side generation works exactly like a conventional panel: direct sunlight strikes the front glass, passes through the encapsulant, and hits the cells to generate DC electricity. Rear-side generation captures light that has been reflected off surfaces beneath or behind the module (measured by a surface's albedo value). The reflected light passes through the rear glass and strikes the back of the same cells.
The rear side never matches front output because reflected light is less intense than direct sunlight. Under favourable installation conditions, however, it contributes 10 to 25% additional energy on top of the front-side output.
The bifaciality factor tells you how much power the rear side of a module produces compared with the front under the same light. A higher figure means more rear-side energy from the same site. Credence Solar's Quasar N and Quasar Bi datasheets list a bifaciality factor of 80 ± 5%. Our TOPCon bifacial guide explains how to read the datasheet figure and turn it into an expected yield gain for a real site.
The core question for any buyer: how much more energy do bifacial solar panels actually generate compared with monofacial? The answer depends on installation conditions.
|
Installation Type |
Typical Bifacial Gain |
|
Rooftop on dark asphalt or tile |
3 to 6% |
|
Rooftop with white membrane or reflective coating |
8 to 12% |
|
Ground-mount on grass |
8 to 12% |
|
Ground-mount on light sand or gravel |
12 to 18% |
|
Ground-mount on snow |
20 to 30% |
|
Elevated tracker with high albedo surface |
15 to 25% |
Four factors determine actual bifacial gain:
1. Albedo (surface reflectivity, the biggest single factor)
2. Mounting height (higher clearance = more reflected light)
3. Tilt angle
4. Row spacing in ground-mount arrays
For most utility-scale developers using single-axis trackers with proper site design, real-world bifacial gain sits between 10 and 15% annually.
It is not a choice between the two. TOPCon is a cell technology and bifacial is a module construction, so one panel can be both, and most new TOPCon modules sold in India are glass-to-glass bifacial. The real decisions are TOPCon or Mono PERC cells, and bifacial or monofacial construction.
| TOPCon | Bifacial | |
|---|---|---|
| What it describes | Cell technology (N-type, tunnel oxide passivated contact) | Module construction (generates from both sides, glass rear) |
| The alternative | Mono PERC cells | Monofacial modules with a backsheet |
| What it adds | Module efficiency of 23 to 24%, against 20 to 21% for Mono PERC | 5 to 25% more energy, depending on ground reflection |
Both cell types are sold as glass-to-glass bifacial modules. TOPCon bifacial modules cost more per watt and return more energy over the module's life, while Mono PERC bifacial modules are the cheaper choice when upfront capital matters more than 25-year output. The TOPCon bifacial guide compares TOPCon, PERC and HJT bifacial modules side by side, and our TOPCon solar panel guide covers the wider TOPCon vs PERC decision.
The full comparison, with albedo figures and the sites where bifacial earns nothing, is in TOPCon vs bifacial solar panels.
Bifacial modules cost more per watt than equivalent monofacial modules, and the gap depends on cell technology, wattage, DCR status and order size. Current per-watt figures, the DCR premium and the payback on the extra cost are covered in our bifacial solar panel price guide. For pricing on a specific Credence module, request a quote.
The main advantages of bifacial solar panels compared with monofacial alternatives:
Bifacial modules are not the right choice for every project. The honest disadvantages:
For a small home solar system, Mono PERC monofacial panels usually offer better economics. For a utility project on a reflective site, bifacial almost always wins.
Bifacial solar panels justify their price premium when at least two of the following are true:
If your project is a residential rooftop under 5 kW on a standard dark tile roof, monofacial modules typically deliver better returns. If your project is a ground-mount installation over 100 kW on reflective ground, bifacial almost certainly wins.
Credence Solar manufactures glass-to-glass bifacial modules at its 2.2 GW fully automated facility in Rajkot, Gujarat, with AI and AOI-enabled quality control at every production stage. Two bifacial products cover different technology tiers:
Both modules carry BIS, CE, ISO, TUV, UL, and IEC certifications and IP68-rated junction boxes engineered for Indian climate conditions. Full technical datasheets are available in the Download section.
Bifacial solar panels are the leading solar technology for utility-scale projects, ground-mount installations, and C&I rooftops with reflective surfaces in 2026. Their 5 to 25% additional annual energy generation, longer lifespan, and lower degradation deliver superior LCOE for the right installation types. For small residential rooftops on dark surfaces, monofacial modules often remain the economically smarter choice.
For a full comparison of all module classes available in India, read our guide to the best solar panels in India in 2026.
Ready to source glass-to-glass bifacial solar panels? Talk to the Credence Solar team about the Quasar N (TOPCon bifacial) and Quasar Bi (Mono PERC bifacial) modules manufactured at our 2.2 GW automated facility in Rajkot, Gujarat. Call +91 90330 72969 or email info@credencesolar.com or download our product datasheets.
A bifacial solar panel generates electricity from both the front and rear sides of the module. The front captures direct sunlight and the rear captures light reflected from the ground or roof, delivering 5 to 25% more energy than an equivalent monofacial panel.
Modern bifacial solar panels deliver front-side module efficiency of 20 to 23.5%, with rear-side contribution adding 10 to 25% depending on installation conditions. Credence Solar's Quasar N delivers up to 24.00% front-side efficiency with a bifaciality factor of 80±5%.
TOPCon and bifacial describe two different things. TOPCon (Tunnel Oxide Passivated Contact) is a cell architecture using N-Type silicon. Bifacial is a panel construction where both sides generate power. A single module can be both. A TOPCon bifacial panel uses TOPCon cells in a glass-to-glass bifacial construction.
Monofacial solar panels generate electricity from the front side only, using a polymer backsheet on the rear. Bifacial solar panels generate from both sides using a glass rear layer that lets reflected light reach the back of the cells. Bifacial modules typically deliver 5 to 25% more energy under favourable installation conditions.
The comparison is imprecise, since most bifacial panels are themselves monocrystalline. The correct comparison is bifacial vs monofacial. Bifacial modules generate 5 to 25% more energy under favourable conditions, but a TOPCon monofacial can still outperform a Mono PERC bifacial on total efficiency in some installations.
Bifacial solar panels in India in 2026 cost approximately ₹22 to ₹35 per watt at the module level, depending on cell technology and wattage. Mono PERC bifacial modules sit at the lower end, and premium TOPCon bifacial modules with 700+ W at the higher end. Bulk orders negotiate 5 to 10% below published rates.
For most residential rooftops on dark tile or asphalt, bifacial solar panels are usually not worth the 10 to 20% price premium, since rear-side gain is often only 3 to 6% on such surfaces. Bifacial modules make more sense for ground-mount, elevated carport, or reflective-surface installations where gains reach 12 to 25%.
A good bifaciality factor for a modern premium bifacial solar panel is 80% or higher. Entry-level bifacial modules sit at 65 to 75%. Credence Solar's Quasar N and Quasar Bi both deliver a bifaciality factor of 80±5%, placing them in the premium range.
