Choosing the right bi facial solar panel for your property involves more than simply comparing power ratings and prices. Bifacial panels are designed to generate electricity from both sides, so the conditions surrounding the panels can have a significant impact on how much additional energy they produce.
By considering your roof or ground space, surface beneath the panels, shading, panel efficiency and overall system requirements, you can determine whether bifacial technology is the right choice for your solar installation.
Understand Your Energy Requirements
Before choosing a bi facial solar panel, start by looking at how much electricity your property uses.
Consider:
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Annual electricity consumption.
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Average daily usage.
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Peak periods of electricity demand.
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Electric vehicle charging.
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Heating and hot water requirements.
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Potential future increases in energy usage.
This information can help determine the size of the solar system you need.
Assess Your Available Space
The amount and type of space available will influence whether bifacial panels are suitable.
Consider:
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Roof size.
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Ground area.
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Roof orientation.
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Panel angle.
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Available sunlight.
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Shading.
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Space between panels.
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Surface beneath the panels.
Bifacial technology can be particularly useful where there is sufficient space for light to reach the rear of the panels.
Consider the Surface Beneath the Panels
One of the biggest factors when choosing a bi facial solar panel is what is located underneath it.
A reflective surface can send additional light towards the rear of the panel.
Potentially useful surfaces can include:
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Light-coloured roofing.
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Concrete.
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Gravel.
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Reflective ground surfaces.
Dark or heavily shaded surfaces may provide less opportunity for additional rear-side generation.
Look at Bifaciality
When comparing bifacial panels, check the manufacturer's bifaciality rating.
This provides an indication of the panel's rear-side performance compared with its front-side performance.
A higher bifaciality rating can be beneficial when the installation provides plenty of useful light to the rear of the panel.
However, the rating should be considered alongside the actual conditions at your property.
Compare Panel Efficiency
Efficiency is another important specification.
A higher-efficiency bi facial solar panel can generate more electricity from a given amount of sunlight and roof space.
When comparing panels, consider:
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Front-side efficiency.
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Bifaciality.
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Power output.
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Panel dimensions.
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Temperature characteristics.
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Warranty.
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Manufacturer reputation.
Check the Power Output
Power output indicates the electricity a panel can generate under standard testing conditions.
Higher-output panels can be useful when:
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Roof space is limited.
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Electricity consumption is high.
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You want to maximise the capacity of your installation.
However, the total electricity generated by a bifacial system will depend on both front-side and rear-side generation.
Consider Shading
Shading can significantly affect solar generation.
Potential sources include:
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Trees.
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Chimneys.
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Buildings.
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Roof structures.
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Other solar panels.
For bifacial systems, it is particularly important to consider whether surrounding objects could block light from reaching the rear of the panels.
Roof-Mounted vs Ground-Mounted Systems
The type of installation can influence whether bifacial technology is suitable.
Roof-Mounted Systems
Bifacial panels can be used on certain roofs, particularly where the panel design and mounting system allow sufficient light to reach the rear.
Flat roofs can sometimes offer more flexibility because panels can be raised and positioned at an angle.
Ground-Mounted Systems
Ground-mounted installations can provide more space beneath and around the panels, potentially making it easier to take advantage of rear-side generation.
The surface underneath the panels can also be selected or designed to influence light reflection.
Consider Panel Spacing and Height
Panel spacing and mounting height can influence bifacial performance.
If panels are installed too close together or too close to a non-reflective surface, the rear side may receive less useful light.
A suitable mounting design can help improve access to reflected and diffuse light.
Choose a Suitable Inverter
The inverter is a crucial component of any solar PV system.
It converts the DC electricity generated by your panels into AC electricity that can be used by your property.
When choosing a bi facial solar panel, make sure the panels are compatible with your chosen inverter and that the complete system is correctly designed.
Consider Battery Storage
If you want to maximise the use of electricity generated by your solar panels, battery storage may be worth considering.
During periods of high solar production, excess electricity can be stored in a compatible battery for later use.
This can help:
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Increase self-consumption.
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Improve energy management.
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Reduce reliance on grid electricity.
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Make better use of renewable electricity.
Check Warranties and Durability
Solar panels are intended to operate outdoors for many years, so warranty and durability are important considerations.
When comparing a bi facial solar panel, check:
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Product warranty.
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Performance warranty.
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Manufacturer reputation.
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Construction quality.
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Environmental ratings.
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Installation requirements.
Always review the manufacturer's specific warranty terms before purchasing.
Consider Your Budget
The cheapest panel is not necessarily the best option for your property.
When comparing bifacial systems, consider the complete cost, including:
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Solar panels.
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Inverter.
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Mounting system.
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Battery storage.
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Installation.
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Monitoring equipment.
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Maintenance.
It is also worth considering the potential additional electricity generated from the rear of the panels when assessing long-term value.
Choose an Experienced Solar Supplier
Bifacial technology requires careful system design because rear-side generation depends heavily on installation conditions.
An experienced solar supplier can assess:
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Roof or ground conditions.
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Surface reflectivity.
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Panel height.
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Panel spacing.
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Shading.
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Orientation.
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Inverter compatibility.
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Battery requirements.
This can help determine whether a bi facial solar panel system is genuinely suitable for your property.
Final Thoughts
Choosing the right bi facial solar panel requires consideration of both the panel itself and the environment in which it will be installed.
Efficiency, power output, bifaciality, warranties and durability are important, but factors such as surface reflectivity, panel height, spacing and shading can have a major influence on the additional electricity generated from the rear.
For properties with suitable conditions, bifacial technology can provide an effective way to maximise solar generation and make better use of available space. A carefully designed system can help ensure you get the best possible performance and long-term value from your investment.
