(Updated April 2026) Bifacial PV modules are considered one of the most significant advancements in photovoltaics. They can utilize light from both the front and back sides, thereby achieving higher electricity yields.
But the crucial question is: Are bifacial modules also economically viable for commercial PV systems?
What are bifacial PV modules? (explained simply)
Bifacial PV modules generate electricity not only from the front but also from the back.
- Front → direct sunlight
- Reverse side → reflected light (e.g., from ground, snow, facades)
Result: Additional yield of approximately 5 to 30 % is possible (location-dependent)
When are bifacial PV modules really worth it?
Bifacial modules are not universally better, but strongly dependent on the location of use.
Useful for:
- Open-space facilitiesSolar parks)
- Agri-PV
- PV carports
- Vertical installations (fences, facades)
- Light or reflective surfaces (e.g., snow, gravel, foils)
Reason: The back of the panel can effectively generate electricity here
Less sensible for:
- classic pitched roofs
- densely covered Flat roofs
- dark surfaces (asphalt, bitumen)
- limited distance to the ground
Reason: Little reflection → little added value
Advantages of bifacial PV modules
Higher current yield
- Use of direct + reflected light
- especially strong under optimal conditions
2. Improved Low-Light Performance
- stable yields in diffuse light
3. Higher space efficiency
- More yield per square meter is possible
4. Technical Robustness
- long-lasting and stable
- often implemented as glass-glass modules
Disadvantages of bifacial PV modules
Higher investment costs
- about 10–20 % more expensive
- in the large-scale plant sector, sometimes significantly more
More elaborate planning
- optimal height and distance required
- more complex assembly systems
3. Dependence on Location
- Higher yield, highly variable
- poor planning → little economic advantage
4. Maintenance and Contamination
- Additional maintenance effort possible
- The back must remain clean
Comparison: Bifacial vs. Conventional
| Criterion | Bifacial Modules | Conventional modules |
| Power generation | higher (location-dependent) | stable |
| Costs | higher | more favorable |
| Planning | complex | standardized |
| Application area | specific | universal |
| Economic efficiency | depending on the setup | most predictable |
How significant is the incremental yield really?
Typical values:
- Standard conditions: +5–10 %
- Optimized Open Space +10–20 %
- Ideal conditions (e.g., snow): up to 30 %
Important: The additional yield must higher than the additional costs – otherwise it's not worth it.
What factors determine profitability?
For commercial PV systems, the following points are crucial when selecting PV modules:
- Surface reflectance (albedo)
- Mounting height and angle
- Shading
- Maintenance Concept
- Investment costs
- Electricity price and self-consumption
Conclusion: Without detailed planning, no valid statement is possible.
Typical areas of use in trade and industry
Bifacial modules are mainly used today for:
- Solar parks Open space
- Agri-PV systems
- Solar carports
- vertical PV systems
- Special applications with reflective surfaces
They are less relevant for traditional industrial and commercial roofs.
Practice Recommendation for Companies
For most companies,
Standard roof systems = mostly monofacial modules more economical
Special surfaces or open spaces = check bifacial modules
The decisive factor is not technology, but project-specific economic viability
Conclusion: Bifacial modules are not standard – but a specialized solution
Bifacial PV modules offer clear technical advantages and can deliver significantly higher yields under optimal conditions.
However, for commercial PV systems: they are no generally better solution, but rather a Location-based optimization technology.
- For open spaces and special applications → often sensible
- For classic roof systems → often economically inferior
The deciding factor is always individual planning and economic feasibility analysis