What Are the Main Types of Solar Panels?

 

The main categories are:

​

• Monocrystalline solar panels

• Polycrystalline solar panels

• Thin-film solar panels

• Solar thermal collectors

• Evacuated tube solar collectors

​

The first three are forms of solar PV technology designed to generate electricity.

​

Solar thermal collectors work differently and are primarily used to produce hot water.

​

For most modern domestic installations, monocrystalline solar panels are now one of the most commonly specified options.

​

​

Monocrystalline Solar Panels

 

Monocrystalline solar panels are made from photovoltaic cells produced using a single-crystal silicon structure.

​

They are generally recognisable by their dark or almost black appearance and relatively uniform finish.

​

One of their main advantages is efficiency.

​

Because monocrystalline cells can produce a relatively high output from a limited area, they are particularly useful where roof space is restricted.

​

This can make them a strong option for typical UK houses where chimneys, rooflights, dormers and changes in roof shape reduce the amount of usable roof area.

​

Advantages of Monocrystalline Solar Panels

Typical advantages include:

• High efficiency

• Good power output from a relatively small roof area

• Modern appearance

• Wide availability

• Suitable for domestic and commercial installations

• Long expected service life

​

For many homeowners asking about the best type of solar panel, monocrystalline panels are likely to be one of the first technologies an installer will consider.

​

However, the best choice should still depend on the individual property, system design and budget.

​

​

Polycrystalline Solar Panels

 

Polycrystalline panels are also made from silicon, but the manufacturing process uses multiple silicon crystal fragments rather than a single crystal structure.

​

They have traditionally had a more blue-toned appearance.

​

Polycrystalline panels were widely used for many years, but monocrystalline technology has become increasingly dominant in modern residential installations because it generally provides higher efficiency.

​

That does not mean a polycrystalline panel cannot generate useful electricity.

​

The main issue is usually the amount of roof area required to achieve a particular system output.

​

Where roof space is limited, higher-output monocrystalline panels may offer a more practical solution.

​

​

Thin-Film Solar Panels

 

Thin-film solar panels use a different manufacturing process from traditional crystalline silicon PV panels.

​

Instead of using conventional rigid silicon cells, photovoltaic material is deposited in thin layers.

​

Thin-film technology can be lighter and more flexible, depending on the product.

​

It can therefore be useful for certain specialist applications.

​

Examples can include:

​

• Lightweight structures

• Large commercial roofs

• Curved surfaces

• Building-integrated applications

• Locations where conventional rigid panels are unsuitable

​

However, thin-film panels can require more surface area to generate an equivalent amount of electricity compared with high-efficiency crystalline panels.

​

For this reason, they are less common on ordinary residential roofs.

​

​

What Is a Photovoltaic Cell?

 

A photovoltaic cell is the basic electricity-generating component inside a solar PV panel.

​

When daylight reaches the photovoltaic material, electrical energy is produced.

​

Individual photovoltaic cells are connected together to form a solar panel.

​

Several panels can then be connected together to create a complete solar PV array.

​

The basic sequence is:

​

Photovoltaic Cell → Solar Panel → Solar Array → Inverter → Property

​

The inverter then converts the electricity produced by the panels into electricity that can be used within the home or business.

​

Photovoltaic cells are therefore at the heart of every conventional solar PV system.

​

​

Different Types of Photovoltaic Cells

 

Photovoltaic technology continues to develop.

​

Within the broad category of monocrystalline solar panels, manufacturers may use different cell designs intended to improve efficiency and performance.

​

The technical terminology can sometimes make solar quotations appear more complicated than necessary.

​

For most property owners, the important questions are:

​

• How much power does each panel produce?

• How many panels can fit on the roof?

• What is the estimated annual generation?

• What warranties are provided?

• Who manufactures the panels?

• How does the proposed system compare with alternatives?

​

The precise photovoltaic cell technology matters, but it should be considered as part of the complete system rather than in isolation.

​

​

Types of Solar Panels for Houses

 

When looking at the types of solar panels for houses, the most suitable choice will depend on the roof and the household's electricity requirements.

​

For a typical house, important considerations include:

​

• Available roof area

• Roof orientation

• Roof pitch

• Shading

• Appearance

• Electricity consumption

• Panel efficiency

• Budget

• Battery storage

• Future EV charging

​

In many cases, modern monocrystalline panels provide a good balance between efficiency, appearance and roof-space utilisation.

​

However, the installer should assess the property before making a recommendation.

​

​

Which Type of Solar Panel Is Best for a Small Roof?

 

Where available roof space is limited, panel efficiency becomes particularly important.

​

Higher-output monocrystalline panels can allow more generating capacity to be installed within a smaller area.

​

For example, a roof may have sufficient space for only eight or ten panels because of dormers, rooflights or chimneys.

​

Using higher-output panels can potentially increase the total capacity of the system without increasing the number of panels.

​

This is why panel output should be considered alongside physical panel dimensions.

​

​

Which Type of Solar Panel Is Best for a Large Roof?

 

Where a property has substantial roof space, there may be greater flexibility.

​

A larger residential roof, warehouse, farm building or industrial unit may be able to accommodate a substantial array.

​

In these situations, the decision may involve balancing:

​

• Panel efficiency

• Panel price

• Total system output

• Installation costs

• Roof loading

• Electrical demand

• Export limitations

​

For commercial projects, the best solution may not necessarily be the most expensive panel.

​

The design should consider the total cost of producing electricity over the life of the installation.

​

​

What Is the Best Type of Solar Panel?

 

There is no single best type of solar panel for every property.

​

For many current domestic installations, monocrystalline technology is likely to be a strong choice because of its efficiency and relatively compact use of roof space.

​

However, the best panel for one property may not be the best choice for another.

​

A suitable system should consider:

​

panel efficiency + roof area + electricity demand + installation cost + system design.

​

The manufacturer, product warranty and installer quality should also be taken into account.

​

Choosing a high-quality panel but installing it as part of a poorly designed system is unlikely to produce the best overall result.

​

​

Solar PV Panels vs Solar Thermal Panels

 

Solar PV and solar thermal are sometimes confused, but they perform different jobs.Solar PV Panels

Solar photovoltaic panels generate electricity.

​

The electricity can then be used within the property, stored in a battery or exported to the grid.

​

Solar Thermal Panels

Solar thermal systems collect solar energy to help produce hot water.

​

They do not generate household electricity in the same way as solar PV.

​

For homeowners primarily interested in reducing electricity purchased from the grid, solar PV is usually the relevant technology.

​

​

What Is an Evacuated Tube Solar Collector?

 

An evacuated tube solar collector is a type of solar thermal system.

​

Instead of using flat photovoltaic panels, it uses rows of glass tubes designed to collect solar heat.

​

The heat is transferred into a fluid circulating through the system and can then be used to help heat water.

​

Evacuated tube systems can perform well in cooler conditions because the vacuum within the tubes helps reduce heat loss.

However, they are fundamentally different from solar PV.

​

An evacuated tube collector is used for solar heating, while photovoltaic panels are used for solar electricity generation.

​

This distinction is important when comparing solar technologies.

​

​

Flat Plate Solar Thermal Collectors

 

Another form of solar thermal technology is the flat plate collector.

​

These systems typically consist of a dark absorber plate enclosed within an insulated panel.

​

Solar heat is collected and transferred to the property's hot-water system.

​

Flat plate collectors can have a more conventional panel appearance than evacuated tubes.

​

Again, they should not be confused with solar PV panels.

​

​

In-Roof Solar Panels

 

Most solar panels are installed above the existing roof covering using a mounting system.

​

However, another option is in-roof solar PV.

​

With an in-roof installation, the solar panels form part of the roof covering itself.

​

This can provide a cleaner appearance and may be particularly suitable for:

​

• New houses

• Home extensions

• Major renovations

• Complete roof replacements

​

In-roof solar can be easier to incorporate when considered during the design stage.

​

​

Bifacial Solar Panels

 

Bifacial solar panels are designed to collect light from both the front and rear surfaces of the panel.

​

Light reflected from the surface beneath the panels can therefore contribute to electricity generation.

​

This technology can be useful for certain:

​

• Ground-mounted systems

• Commercial installations

• Solar canopies

• Flat roofs

• Specialist projects

​

The benefits depend heavily on the mounting arrangement and surrounding surfaces.

​

Bifacial panels are therefore not automatically the best choice for a conventional pitched domestic roof.

​

​

Solar Roof Tiles

 

Solar roof tiles are designed to resemble conventional roofing products while incorporating photovoltaic technology.

​

They can provide a more integrated appearance than traditional panels mounted above the roof.

​

However, they should be compared carefully with conventional solar PV in terms of:

​

• Cost

• Efficiency

• Maintenance

• Availability

• Installation complexity

• Replacement options

​

For homeowners prioritising appearance, integrated solar products may be worth considering.

​

​

Which Solar Panels Generate the Most Electricity?

 

The amount of electricity produced depends on more than the panel technology alone.

​

Important factors include:

​

• Panel wattage

• Number of panels

• Orientation

• Roof pitch

• Shading

• Geographic location

• System losses

• Inverter efficiency

​

A high-output panel placed on a heavily shaded roof may generate less electricity than a lower-rated panel installed in a better position.

​

This is why solar should be treated as a complete system design problem rather than simply a comparison of panel wattages.

​

​

Solar Panel Efficiency

 

Solar panel efficiency describes how effectively a panel converts available light into electricity.

​

Higher efficiency can be particularly useful where roof space is restricted.

​

However, efficiency should not be considered alone.

​

A homeowner should also look at:

​

• Panel cost

• Total installed capacity

• Expected annual generation

• Warranty

• Manufacturer reputation

• Degradation over time

​

A slightly less efficient panel may still represent good value where sufficient roof space is available.

​

​

Solar Panels and Battery Storage

 

The type of solar panel chosen is only one part of the system.

​

Many installations now also incorporate battery storage.

​

The panels generate electricity during daylight hours, while the battery stores surplus energy that can be used later.

​

The system may therefore operate as:

​

Solar Panels → Home → Battery → Grid

​

Battery capacity should be selected according to the property's energy usage and expected solar generation.

​

Installing a larger battery does not automatically create better value if there is insufficient surplus electricity available to charge it.

​

​

Choosing Between Different Types of Solar Panels

 

When comparing different types of solar panels, homeowners should ask installers to explain why a particular product has been recommended.

​

Compare:

• Panel manufacturer

• Panel technology

• Output per panel

• Panel dimensions

• Number of panels

• Total system capacity

• Estimated annual generation

• Product warranty

• Performance warranty

• Inverter

• Battery compatibility

• Installation cost

​

This provides a much clearer comparison than simply asking which solar panel is "best".

​

​

Choosing a Solar Panel Installer

 

The installer plays a major role in the performance of any solar system.

​

A good installer should assess the roof, electricity demand and future energy requirements before recommending a particular technology.

The quotation should clearly identify the panel manufacturer and model rather than simply stating "solar panels".

​

It should also include expected system output, annual generation estimates and details of the proposed inverter and battery system where applicable.

​

APN Solar helps homeowners and businesses find suitable solar panel installers operating in their area.

​

​

Which Type of Solar Panel Is Right for You?

 

For many UK homes, modern monocrystalline solar panels are likely to provide a strong combination of efficiency, appearance and long-term electricity generation.

​

However, different buildings can require different solutions.

​

A house with limited roof space, a commercial warehouse, a listed property and a ground-mounted rural installation may all require very different approaches.

​

The best starting point is therefore to assess the property and compare properly designed systems rather than selecting a panel technology in isolation.