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Last updated: 1 February 2024

Solar Panel Sizes, Dimensions, and Wattages: UK Guide 2024

Solar panel sizes, dimensions, wattages
  • Solar panel size indicates the amount of energy that is produced by your system, while solar panel dimensions indicate the physical size of the solar panel.
  • The average 350W solar panel has the dimensions of 190cm x 100cm x 4cm.
  • On average, domestic solar panels weigh somewhere between 18 and 21kg.

To be able to choose the right solar system for your home, you will need to know more about solar panel sizes, dimensions, and wattages. In this guide, we walk you through these key features to give you a better idea of the technical specifications of solar panels

However, the surest way to make sure that you opt for the solar panel size that best suits your energy needs is to consult a solar expert who can offer you tailored advice. Finding a professional you can trust on your own can be extremely difficult. Instead of spending hours on tedious research, let us help you get the process started in just 30 seconds. 

Simply fill in our short form to request free, non-binding quotes from up to 4 local solar panel installers. By comparing the quotes you receive, you can decide which solar expert you want to work with and find the best deal on your new solar panel installation. Simply click below to get started today!

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Introduction to solar panel sizes, dimensions, and wattages

Solar panel size and dimension

You might think that size and dimension are synonymous when talking about solar panels. However, these specifications actually mean different things. 

Solar panel size refers to the power output of your solar panels. This is measured in Watts (W) and is calculated by multiplying the panel voltage by the amperage. So, when you are asking yourself: “What size solar system do I need?” you will find your answer by checking the wattage of solar panels. 

Solar panel dimensions showcase the physical size of the solar panel. Dimensions are measured in metres (m), centimetres (cm), or millimetres (mm). Solar panel dimensions indicate the length, width, and thickness of the panels, giving you a better indication of how much space they will take up on your roof. 

Solar panel sizes in the UK: Most common PV panel sizes

Currently, some of the most common solar panel sizes in the UK are 350W and 450W solar panels. In terms of solar system sizes, the most common ones for domestic use are 3kW, 4kW, or 6kW solar panel systems. 

Below, you can find an overview of the different solar panel sizes and systems to get an idea of which options would be suitable for different house sizes. 

Solar Panel System Sizes (350W Panels)
House SizeAverage Yearly Energy ConsumptionSystem SizeNumber of Solar Panels
1-2 bedrooms1,800kWh3kW8
2-3 bedrooms2,700kWh4kW10
4-5 bedrooms4,100kWh6kW16
Solar Panel System Sizes (450W Panels)
House SizeAverage Yearly Energy ConsumptionSystem SizeNumber of Solar Panels
1-2 bedrooms1,800kWh3kW6
2-3 bedrooms2,700kWh4kW8
4-5 bedrooms4,100kWh6kW13

Solar panel size chart

Solar panel size is a crucial factor to consider, as it is the element that ensures that your energy needs are met by your solar system. Solar panel sizes like 350W or 450W can generally easily tend to the electricity consumption requirements of small to large households. However, you will want to keep in mind that the larger the solar panel size, the lower the number of solar panels your installation will require. 

Solar panels per system size

At the same time, knowing more about solar panel and system sizes is important if you want to have a better idea of how much you will spend on your new installation. Today, how much solar panels cost in the UK ranges anywhere from £4,500 to £11,000, depending on the system size you require. 

As you can see, installing solar panels is quite expensive. That is why it is worth checking whether you are eligible for any solar panel grants in the UK to lessen the financial burden of investing in solar technology. 

Solar panel dimensions in the UK: Millimetres, centimetres, and metres

The dimensions of an average residential solar panel in the UK are 190cm x 100cm x 4cm. In millimetres, this translates to 1,900mm x 1,000mm x 40mm, while in metres solar panels are 1.9m x 1m x 0.04m. 

These calculations refer to the length, width, and thickness of the solar panel. It is important to be aware of these measurements because they will inform you how much space a certain number of solar panels will take up on your roof. 

Average Solar Panel Dimensions
Solar Panel SizeLength of Solar PanelsWidth of Solar PanelsThickness of Solar Panels
350W190cm100cm4cm
450W190cm100cm4cm
600W (for commercial use)195cm100cm3.8cm

With these dimensions in mind and based on the solar panel system size you require, your solar panels will take up more or less space on your roof. As an estimate, a 3kW solar panel system in the UK will require about 16m2 of roof space. A 4kW system will take up around 20m2, while a 6kW one will need somewhere around 32m2. 

Solar panels roof

How much power in Watts can solar panels produce per day, week, and month?

Solar panels can generate between 120W and 500W in a day. The amount of electricity that your solar panels generate will depend heavily on the size of your solar panels and the size of your system.

How much energy do 350W solar panels generate?
  • Per day: 120W – 300W
  • Per week: 840W – 2,100W
  • Per month: 3,600W – 9,000W
How much energy do 450W solar panels generate?
  • Per day: 200W – 500W
  • Per week: 1,400W – 3,500W
  • Per month: 6,000W – 15,000W

Many solar panel calculations assume that they are operating efficiently. This can depend on sunlight hours, clear access to light, and their angle. To get the most out of solar panels, make sure you have no shade in the area around them and have 4 to 5 hours of sunlight. They must also be at a 30 to 50-degree angle and facing South, which is the best direction for solar panels in the UK.

No clue what size solar panels would best suit your energy needs? Then you will want to consult a solar expert. Instead of wasting hours trying to find a professional you can trust on your own, let us help you get the process started in just 30 seconds. 

Simply answer a few short questions, and sit back and wait while up to 4 local solar panel installers reach out to you with quotes for a new solar panel installation. You can then choose which professional you want to consult and find the best deal for your home. All quotes are free and come with no obligation to commit to an installer. You can get started by clicking below.

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How heavy are solar panels in the UK?

Solar panel weight

Generally, solar panels for domestic use weigh somewhere between 18 and 21kg. Solar panels for commercial use are heavier, weighing around 22-30kg

What this means for you is that you will want to make sure that your roof can accommodate the weight of your solar panels. Most rooftops in the UK can hold a load of 140kg per square metre. Solar panels weigh far less, somewhere around 20kg per square metre

Thankfully, this means that your roof can most likely easily support your new solar panel installation. However, you will want to have a solar panel installer assess the integrity and structure of your roof to ensure that your new system is safe to install. 

Find solar panel installers for your UK household

Want to know more about solar panel sizes, dimensions, and wattages and what they mean for your home? Then you will want to consult a solar panel installer who can provide you with tailored advice. 

Finding a solar expert you can trust on your own can be a pain. Not only can the process take hours or even days of research, but you might not even find what you were looking for. Thankfully, with our help, you can avoid any frustration or disappointment. 

We can put you in contact with solar panel installers from our broad network of specialists operating across the country. So, whether you are looking for solar panels in Scotland or solar panels in Wales, to name but a couple of regions, one of the installers we work with can surely help you. 

All you need to do to get in touch with them is fill in our 30-second form and request quotes for a solar panel installation. You will then hear back from up to 4 solar panel installers near you and pick the one you want to work with. On top of that, by comparing the quotes you receive, you will also be able to find the best deal for your new solar panels. Simply click below to get started now!

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Frequently asked questions

Sabria Schouten
Written by Sabria Schouten, Writer

Sabria Schouten is a content writer dedicated to helping readers make informed decisions when it comes to their energy consumption.

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