Solar technology has come a long way, and bifacial solar panels are one of the more interesting developments to reach Australian homes and businesses. Unlike standard panels that collect sunlight from one side, bifacial models can generate electricity from both the front and rear surfaces.

That extra energy-generation potential can be valuable in Australia, where many properties receive strong sunlight year-round. However, bifacial technology is not automatically the best choice for every roof. The panel design, mounting height, surrounding surfaces, shade and overall system layout all affect how well it performs.

Let’s take a closer look at how these panels work and whether they make sense for your property.

 

What Are Bifacial Solar Panels?

Most traditional solar panels have photovoltaic cells on the front and an opaque backing sheet behind them. They generate electricity from sunlight hitting the front surface.

Bifacial panels work differently. Their rear surface is also capable of collecting light. While the front receives direct sunlight, the back captures light reflected from the roof, ground or nearby surfaces.

The amount of extra energy produced is known as the bifacial gain. It varies from one installation to another because rear-side generation depends on factors such as mounting height, panel tilt, shading and surface reflectivity. Research has found that ground reflectivity and installation height can directly affect bifacial system performance.

Many bifacial modules use a double-glass construction instead of a standard backing sheet. This allows light to reach the rear cells while helping protect the panel from moisture and environmental stress.

 

How Do Bifacial Panels Produce More Energy?

The front of a bifacial panel works like any other solar module. Sunlight reaches the cells and is converted into direct-current electricity.

The difference happens underneath. Light that strikes a pale roof, concrete area or another reflective surface can bounce onto the rear of the panel. The rear cells then turn some of that reflected light into additional electricity.

This means the system usually needs space behind the panels. A bifacial panel installed flat against a dark roof may receive very little rear-side light, limiting its advantage. Raised frames, tilted racks, carports, commercial rooftops and ground-mounted systems often provide better conditions.

For industrial facilities, warehouses and commercial properties with large, lightly coloured roofs, bifacial technology can be particularly useful. It may also suit solar car parks, farms, schools and developments where panels are raised above the ground.

 

What Are N-Type Bifacial Panels?

You may come across the term n-type solar panels while comparing bifacial products. N-type refers to the type of silicon and cell structure used inside the module.

N-type cells are commonly paired with bifacial designs because they can offer strong rear-side performance, good low-light operation and lower degradation over time. Powerbay, for example, offers N-type TOPCon bifacial panels designed for residential and commercial installations.

The panel type is only one part of the decision, though. You should also consider the manufacturer’s product warranty, performance warranty, efficiency rating, temperature coefficient and local service support.

 

Main Benefits of Bifacial Solar Panels

The most obvious benefit is the possibility of generating more electricity from the same panel area. This can be useful where roof or ground space is limited.

Double-glass bifacial modules may also provide additional protection against moisture, ultraviolet exposure and corrosion. Their durability can make them appealing for commercial and industrial locations exposed to demanding weather conditions.

They are also flexible enough for several applications. Homeowners may use them on suitable raised rooftops, while builders and property developers can incorporate them into carports, pergolas and other structures. Businesses can install them on warehouses, open land or elevated mounting systems.

Solar users and EV owners may benefit from the extra daytime generation, particularly when charging a vehicle or running appliances while the panels are producing power.

 

Choosing the Right Inverter

Panels are only one part of a solar system. Choosing the right inverter for solar panels is just as important.

The inverter converts the direct-current electricity produced by the panels into alternating-current electricity that can be used by your home or business. Australian systems commonly use a central string inverter, microinverters or a string inverter combined with power optimisers.

Your installer should size the inverter according to the panel capacity, expected generation, roof layout and local network requirements. Properties with panels facing different directions or experiencing partial shade may benefit from microinverters or optimisers.

Before purchasing, check that the panels, inverter and any battery are included on the relevant approved-product lists. Eligible small-scale systems must use approved components and be designed and installed by appropriately accredited professionals.

 

Should You Add a Solar Battery?

A battery can store surplus solar electricity for use at night or when generation is low. It can be helpful for households with high evening consumption, businesses operating outside daylight hours and EV owners who charge after returning home.

The battery for solar panel price will depend on storage capacity, chemistry, warranty, installation requirements and whether switchboard or inverter upgrades are needed. Don’t judge a system on the battery price alone. Consider its usable capacity, expected lifespan, backup capabilities and compatibility with your existing solar equipment.

A hybrid inverter may be practical when solar panels and a battery are installed together. However, an existing system can often be upgraded using a separate battery inverter.

 

Installation Matters

Bifacial panels need a carefully planned installation to deliver their full benefit. Your installer should assess:

• Roof or ground reflectivity
• Mounting height and tilt
• Rear-side shading
• Panel spacing
• Roof strength and available space
• Inverter and battery compatibility
• Local grid-connection requirements

A professional system design should estimate the expected annual generation rather than relying only on the panel’s wattage. Powerbay can help homeowners, electricians, developers and facility managers compare bifacial panels with suitable inverters and energy-storage options.

 

Solar Inverter Maintenance

Solar systems generally require limited upkeep, but monitoring remains important. Basic solar inverter maintenance includes checking the monitoring app, watching for fault codes and keeping the inverter’s ventilation area clear.

The Australian Government suggests following the manufacturer’s maintenance schedule and considering a professional system service about every two years. A qualified person should inspect electrical components, cables, isolators and inverter fault records.

Never attempt electrical repairs yourself. Solar equipment can remain energised even when the mains supply is switched off.

 

Conclusion

Bifacial technology can provide additional energy generation, but good results depend on thoughtful system design. The panels need suitable clearance, limited rear shading and a surface that reflects enough light.

For Australian homeowners, businesses, builders and renewable-energy enthusiasts, the best approach is to compare the complete system, not just the panels. A suitable inverter, quality installation, realistic generation estimate and optional battery storage all play an important role.

By working with an experienced provider such as Powerbay, you can choose a solar solution that suits your property, energy use and long-term goals.

 

Frequently Asked Questions

Q – Do bifacial panels work on residential roofs?
A – Yes, but their benefit depends on the installation. Raised panels over a reflective roof will generally have better rear-side exposure than panels installed close to a dark surface.

 

Q – Are bifacial panels more expensive?
A – They can cost more initially, although pricing varies by brand, technology and installation method. The value comes from potential additional generation and durable construction.

 

Q – Can bifacial panels work in cloudy weather?
A – Yes. They still generate electricity from available daylight, although output will be lower than on a clear, sunny day.

 

Q – Are they suitable for commercial properties?
A – Yes. Commercial rooftops, carports and ground-mounted arrays can provide the panel clearance and reflective surroundings needed to make good use of the rear surface.