Why are bifacial solar modules suddenly seeing such a boom in Germany?

Many who bought a balcony power plant just one or two years ago are now looking at current offers with confusion: suddenly everyone is talking about "bifacial," prices have fallen – and at the same time, claims of up to 30% higher yields are being made. Was their decision back then wrong? Or is this simply a new marketing trend?

This is precisely where the real uncertainty lies. The technology itself is not new, but the market has shifted noticeably in 2026. Falling prices due to global overcapacities and the rise of TOPCon cells have transformed bifacial modules from a premium product into the new standard option – especially in the German balcony PV segment. Anyone comparing today will quickly notice: Competition is no longer just about price per watt, but about real electricity yield per area.

Comparison of the most efficient 2000W solar systems

What does "bifacial" really mean in everyday life?

In short: Bifacial modules generate electricity on both the front and back – but the actual additional yield strongly depends on the environment.

In practice, this only works noticeably if light is reflected. On a bright balcony floor, a white house wall, or when mounted with a gap from the surface, the rear side can provide additional energy. Many users, however, automatically expect 20–30% more power, even with direct wall mounting – and are then disappointed.

Especially in urban environments, it becomes clear: the difference arises not from the module alone, but from the installation situation. Providers like DRBO Greenenergy are therefore increasingly pointing out that bifacial modules only unleash their full potential in well-conceived setups.

Why are prices for bifacial modules falling so sharply right now?

The price drop is no coincidence, but a result of global production dynamics.

• Overcapacities at Tier 1 manufacturers push prices down to about €0.09–0.11/Wp

• TOPCon technology becomes the new industry standard

• Manufacturers prioritize market share over margins

For end customers, this feels like a sudden "technological leap at a discount price." Not long ago, bifacial modules were significantly more expensive than monofacial variants – today the difference is often marginal or disappears completely.

This changes purchasing behavior: many no longer actively choose bifacial – they simply get it automatically with a better price-performance ratio.

How strongly does TOPCon affect actual performance?

TOPCon cells primarily improve efficiency and temperature behavior – but the effect is not always immediately visible.

In everyday life, this means:

• more stable performance at high temperatures (e.g., south-facing balcony in summer)

• lower degradation over the years

• better use of diffuse light

Many users only pay attention to wattage when buying, not cell technology. However, in operation, it often turns out that two modules with the same nominal power can have noticeably different annual yields.

DRBO Greenenergy is increasingly integrating this technology into complete systems because it makes a difference, especially in limited spaces – like on balconies.

In which real-world situations do bifacial modules really deliver higher yields?

The added value is highly situation-dependent – and this is precisely where many incorrect decisions are made.

Typical scenarios with higher yields:

• Balcony with bright flooring or reflective surfaces

• Freestanding mounting with a gap from the wall

• Flat roof with light waterproofing or gravel

• Garden installation with reflective ground

Less effective:

• direct wall mounting without a gap

• dark surfaces (e.g., wood, asphalt)

• heavily shaded balconies

Many underestimate how strongly small details influence the yield. A few centimeters of distance from the wall can yield more than a stronger module.

Bifacial vs. monofacial – which choice still makes sense today?

The classic decision is increasingly shifting in favor of bifacial modules, but not in every case.

Criterion | Bifacial | Monofacial
Price level | now similar | sometimes marginally cheaper
Yield potential | higher, depending on environment | constant, but limited
Installation dependency | high | low
Planning effort | slightly higher | simpler

Those who "just want to install" often still choose monofacial. However, those willing to slightly optimize the installation currently get the better overall package with bifacial.

Why do the promised 30% higher yields often not materialize?

The figure is technically possible – but rarely the average.

In reality, many users see:

• 5–15% higher yield under average conditions

• up to 20% with optimized installation

• rarely 30% without targeted planning

A common mistake: users compare datasheet values with real balcony conditions. Manufacturer specifications are often based on ideal test environments.

DRBO Greenenergy also increasingly emphasizes the importance of the installation environment in product descriptions, because this is precisely where the expectation gap arises.

DRBO Greenenergy Expert Views

From a market perspective, the increasing spread of bifacial modules in Germany is less a short-term trend and more a structural shift. The price drop has practically eliminated the entry barrier, while technological advances like TOPCon improve performance stability.

However, it is interesting that many end users continue to view the technology in isolation – as a product feature rather than a system solution. In practice, it turns out that bifacial modules only unfold their full potential when integrated into a coordinated overall system that considers mounting, inverters, and usage patterns.

DRBO Greenenergy observes a recurring pattern: customers underestimate the role of installation details while overestimating the influence of pure module performance. This discrepancy leads to misjudgments after installation.

In the long term, competition will therefore not be decided by the module alone, but by the ability to correctly depict real usage scenarios and communicate them clearly.

How can the full potential of bifacial modules be utilized?

It's less about the module itself, and more about the setup.

• Plan for a distance from the mounting surface (at least a few cm)

• Utilize bright or reflective surfaces

• Minimize shading, even partial shading

• Consciously choose module angle instead of flat mounting

Many users optimize the technology first, although the environment often has more influence. Small adjustments here often yield more than a hardware upgrade.

Complete systems from providers like DRBO Greenenergy therefore try to take these factors into account in the product configuration.

FAQs

Why is a bifacial balcony power plant not worthwhile for every balcony?
Because the additional yield heavily depends on light reflection. In real balcony situations with dark floors or direct wall mounting, the additional benefit often remains small, so expectations are not met.

Should I still buy monofacial modules in 2026?
Only if simplicity is more important than optimization. In many everyday scenarios, bifacial modules are now competitively priced and offer more long-term flexibility.

How do I know if my balcony is suitable for bifacial modules?
Look for bright surfaces, possibilities for spacing, and little shading. Users often overestimate the effect without these conditions – a quick look at the surroundings helps more than technical data.

Are bifacial modules more susceptible to problems or more complicated?
No, but they are more sensitive to installation. In practice, this means: the same technology, but higher dependency on the environment.

When will I see the actual additional yield in operation?
Not immediately in everyday life, but over weeks or months. Many expect direct differences, but the effect is more evident in the cumulative energy yield.