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3kW Solar System

Over 1.3 Million Households in the UK are Now Generating Electricity From Solar

It’s not surprising that UK households are switching to renewable energy sources with an all-time high pace. Over 1.3 million households in the UK are now generating their own electricity by harnessing solar energy.

Small houses with 2-3 occupants often seek a solar PV system that can meet their electricity needs and reduce their monthly utility bills. A 3kW solar system is the ideal solution for such homes in the UK. It is cost-effective and provides uninterrupted electricity for approximately 25 years, making the house more energy-efficient.

A 3kW solar panel system is typically suitable for small 2-bedroom houses, and the installation cost is approximately £5,400. And 3kW solar system with battery price in UK is estimated to be around £9000.

If you’re interested in learning more about the 3kW solar system, read this article thoroughly. It covers everything you need to know, including the 3kW solar system price in UK, how many solar panels are needed, the space required for installation, 3kw panel system with battery price and the electricity output of 3kW solar panels system.

To get free quotations and a free online survey for your home or business, simply fill out our form, which will only take a minute. Our experts will get you on touch with our premier and customized solutions.

3kw solar system with battery and without battery cost estimation
Caption – 3kw solar system with battery and without battery cost estimation

What is A 3KW Solar System?

A 3kW solar panel system produces approximately 2500 kWh of electricity annually. The power output of a 3kW system is equivalent to the annual consumption of a small 2-bedroom home or a house with 2-3 occupants. This system operates in the same way as other solar systems by converting sunlight into electricity.

One thing to keep in mind before opting for a 3kW panel system is that it may not fulfill all of your energy needs due to its limited productivity. However, it will still increase your independence and reduce your reliance on the national grid.

What is the Average Price of a 3kw Solar System?

The average 3kW solar system price in UK is around £5,400. However, the price can vary depending on the type of solar panels, inverters, and other necessary equipment. As is commonly known, higher product quality typically comes with a higher price tag, but it also offers increased efficiency and productivity. In most cases, the 3kW panel system price in UK will not exceed £5,500. However, if you prioritize product quality and are willing to pay more, you may need to budget around £7,000 for that.

What Benefits Can I Get By Installing 3kw Solar System?

  • Payback period of approximately 10 years after installation
  • Nearly free electricity production for the next 15 years
  • Increased property value
  • Enhanced energy independence
  • Minimal maintenance expenses

How Much Does a 3kW Solar System with Battery Cost in the UK?

Batteries are the optimal solution for storing excess electricity generated by solar panels. However, incorporating batteries into a 3kW panel system in the UK will inevitably raise the overall cost. On average, with a high-quality 3kW battery, 3KW solar system with battery price in UK is around £9,000. Similar to the fluctuation in solar panel and inverter prices, the cost of batteries also varies depending on the brand and the number of life cycles they offer.

Is 3kw Enough to Power a House?

Solar panel systems are always beneficial for your home as long as they meet your energy requirements. Regarding the 3kW solar system, yes! The 3kW solar panels system in the UK is ideally suited for homes with 2-3 occupants or those with just 2 bedrooms.

If you consider your annual energy consumption and it amounts to 2500 kWh, regardless of the size of your home or the number of people living there, a 3kW solar panel kit is the best choice to increase energy efficiency and reduce reliance on the electricity grid.

The backup option can power your home even at night. A 3kW solar system with battery in UK might cost you more than the actual price, but it will provide power for more hours throughout the day to your house.

How Much Power Does A 3kw Solar System Produce?

A typically 3kW solar Panels system approximately produce 2500 kwh electricity per year. the electricity generation can slightly increase or decrease in different cases, such as number of sunlight hours can slightly make a different, efficiency of solar panels, inverter capacity and the direction of your solar panel potentially reduce or surpass the estimated production of a 3kw solar panels system.

How Much Can I Save By Installing 3 KW Solar System?

On average, with a 3kW solar panel system, you can save up to £270 annually. However, if you have a 3kW solar system with a battery in the UK, your savings will be even higher. With a 3kW solar panel kit alone, you can continuously save £250 – £300 every year for at least the next 25 years.

Best 3kw Solar Batteries

Most households prefer to install a 4kW or 3kW solar system with a battery in the UK due to its efficient energy production and cost-effective nature. However, when considering the addition of a battery to your 3kW solar panels system, it is important to conduct thorough research before making a purchase.

To assist you in your search, we have compiled a list of some of the best 3kW solar batteries available in the UK, including Huawei, Tesla PowerwallLG Chem Resu,andFox Ess. These batteries are renowned for their quality and performance, ensuring optimal storage and utilization of solar energy for your home.

List of Solar Batteries You Can Install with Your 3KW Solar System in the UK

There isn’t a hard and fast rule when it comes to installing a battery storage system alongside your 3KW solar panel setup. It’s all about your energy requirements and personal preferences. With a 3KW solar panel system, you have the flexibility to install a battery of any capacity, whether it’s 3KW, 5KW, 10KW, and so forth.

The greater the battery capacity, the more energy independence you’ll achieve, and the less you’ll rely on traditional electricity sources, ultimately leading to reduced electricity bills. You can choose any option from the provided list to meet energy your needs.

Battery Brand

Usable Capacity (kWh)


Battery Material

Tesla Powerwall

13.5 kWh

From £11,000


SolaX 3.3

3.5 kWh

From £4,010


LG Chem RESU 6.5

6.5 kWh

From £5,500- £7000


Powervault 3

4 kWh

From £4,470- £5000


3Kw Solar Inverter in UK

The quality of the solar inverter directly impacts the production of the system. In the UK, a 3kW solar inverter is commonly used in homes as it matches the energy requirements of a typical household. There are several reputable brands in the market that offer affordable and efficient 3kW inverters, such as FroniusSMASolarEdgeGoodWe, and Victron Energy. These brands are well-known for their exceptional performance and compatibility with solar systems.

What Type Of 3kw Solar Inverter Should You Choose for Your Solar System? 

The type of 3kW solar inverter you choose for your solar system will depend on a number of factors, including the size of your solar array, the type of electrical supply you have, and your budget.

Things to Consider When Choosing A 3kw Solar Inverter:

  • Size of Your Solar Array
  • Type of Electrical Supply
  • Features
  • Budget

Size Of Your Solar Array

The inverter should be able to handle the maximum output of your solar array. A 3kW inverter can typically handle a solar array of up to 3,000 watts.

Type Of Electrical Supply 

If you have a single-phase electrical supply, you will need a single-phase inverter. If you have a three-phase electrical supply, you will need a three-phase inverter.


Some inverters have additional features, such as grid-tie compatibility, battery backup, and WiFi connectivity. These features may be important to you, depending on your needs.


Inverters range in price from a few hundred dollars to several thousand dollars. It is important to set a budget before you start shopping.

Some of The Best 3kw Solar Inverters on The Market



Best Description


Primo 5.0-1

High-quality, reliable inverter with a long warranty.


Sunny Boy 5.0-1

Popular and affordable inverter with a good reputation.



Advanced inverter with smart features that can help you save money.



Good value for money inverter with a wide range of features.

Victron Energy

MultiPlus 5000VA

Versatile inverter that can be used for a variety of applications.

How Many Solar Panels are Required For 3kw Solar System in UK?

3kw solar system uk
Caption – Solar panels installed on the rooftop

The number of solar panels you need to add depends on the size of each panel. For 405-watt solar panels, you will require approximately 8 panels for a 3kW system. However, you have the flexibility to choose higher or lower sized panels based on your specific requirements. It’s important to keep in mind that as the number of panels increases, more installation space will be needed for the system.

Therefore, the most suitable configuration for a 3kW solar system is typically achieved by installing around 8 panels of 405 watts each. In the case of 540-watt solar panels, you would need only 5-6 panels to achieve the same 3kW capacity.

3KW Solar Panels: Different Brands, Sizes, and Key Features

Solar Panel Brand


No. of Panels

Key Features




  • High Efficiency
  • Long Lifespan
  • Durable








  • Competitive pricing
  • Wide range of products
  • Excellent customer service








  • High efficiency
  • Long lifespan
  • Excellent performance in low light conditions








  • High efficiency
  • Durable
  • Excellent performance in low light conditions





What Appliances Can I Run On 3kw Solar Panel System

A 3kW solar system has the capacity to power most of the appliances in a small house with 2 bedrooms. To determine if your appliances can be supported by a 3kW solar system, you can check your monthly unit consumption. If it is around 2000 kWh, a 3kW panel system should be able to run most of your appliances. Here are some examples of appliances that can easily be powered by a 3kW solar panel system in the UK:

  • LED lights
  • LCD television
  • Laptop
  • Microwave
  • Dishwasher
  • Refrigerator
  • Washing machine
  • Fans
  • Toaster
  • Radio
  • Iron
  • Mixer

Find the Right Solar Installer In UK?

To maximize the output of your solar panel system, it is crucial to have it professionally installed. If you are considering investing in a 3kW panel system and searching for the best solar system installer and supplier in the UK, we have the solution for your query. MAK Energy, with a track record of successfully installed systems across the UK, stands out in the market. We are an MCS-certified company. Fill out our form and receive the best quotation from our expert installers in just minutes.


A 3kW solar system is the ideal choice for small houses in the UK, offering efficient energy production and cost-effectiveness. The price of a 3kW solar panel kit in the UK is approximately £5400 without a battery. If you opt for a 3kW solar system with battery in UK, the price will be around £9000. This system is capable of generating approximately 2500 kWh of electricity annually, resulting in savings of nearly £250 – £300 per year. The initial price of a 3kW solar system may not be too high, but it provides ample electricity for small houses with 2-3 occupants.

If you’re looking for the best 3kW solar system price or considering a 3kW solar system with a battery in UK, our company can assist you. At MAK Energy, we specialize in providing high-quality solar system installations at competitive prices. As an MCS-certified company with a proven track record of successful installations across the UK, we are committed to delivering excellent service and expertise. Fill out our form today to receive a customized quotation from our expert installers, tailored to your specific needs.

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