Is It Right for Your South East Home?
A 5kW solar panel system is one of the most popular choices for UK households with medium to higher electricity usage. At SolarTherm UK, we regularly install 5kW systems for families looking to significantly reduce their energy bills while gaining greater control over rising electricity costs.
Typically a 5kW system consists of 10-14 high efficiency solar panels, depending on the panel wattage selected and the available roof space. When professionally designed and installed, this system size can transform how your home generates and consumes electricity.
What Does a 5kW Solar Panel System Look Like?
A standard 5kW installation includes:
- 10-14 premium solar panels
- A solar inverter to convert DC to usable AC electricity
- Mounting system tailored to your roof type
- Optional battery storage system
- Monitoring system to track performance
At SolarTherm UK, every system is bespoke designed to match your roof orientation, shading levels and household energy profile.
How Much Does a 5kW Solar System Cost?
In 2026, the average cost of a professionally installed 5kW solar panel system typically ranges between £6,500 to £8,500. However, the final investment depends on roof complexity and scaffold requirements, panel brand and efficiency rating and the inverter type. If you add solar battery storage the price will be an additional £2,500 to £5,000 depending on size and brand of the battery.
While the upfront cost may seem substantial, many homeowners see strong long term returns through reduced electricity bills and protection from future energy price hikes.
Benefits of a 5kW Solar Panel System
Significant Energy Bills Savings
Generating your own electricity reduces reliance on the grid. For many UK households, a 5kW system can offset a large portion of annual electricity consumption and save up to 80% on electricity bills.
Reduced Carbon Footprint
Solar energy is renewable and low emission. Switching to solar reduces dependence on fossil fuels and lowers household CO₂ output.
Increased Energy Independence
With rising UK electricity prices, generating your own power provides stability and control over your energy usage.
Improved Property Appeal
Homes with solar installations are increasingly attractive to buyers seeking energy efficient properties.
Low Ongoing Maintenance
Modern solar panels are durable and require minimal upkeep beyond occasional cleaning and routine electrical checks.
Potential Drawbacks to Consider
A transparent solar consultation should always include both advantages and limitations. At SolarTherm UK we provide you with all the facts so you can make a balanced and informed decision.
Upfront Investment
Solar requires an initial capital outlay, though low interest financing options may be available.
Weather Variability
Solar systems produce less during winter months or prolonged cloudy periods. However, modern solar panels will still generate electricity efficiently in diffused daylight.
Roof Suitability
Your roof’s direction, pitch and structural condition impact performance. South-facing roofs are ideal, but east- or west-facing systems can still perform very well.
Without Battery Storage, Excess Energy Is Exported
If you’re not home during the day, unused electricity is sent to the grid unless you install solar battery storage.
Should You Add Battery Storage?
While not mandatory, battery storage significantly increases self-consumption. Without a battery, daytime surplus energy is exported to the grid for payment under the Smart Export Guarantee (SEG) and you still rely on expensive grid imports in the evenings and overnight.
With battery storage, surplus energy is stored for use in the evenings and overnight, reducing your reliance on grid electricity during expensive pricing windows. Battery storage also gives you access to cheaper off peak electricity that can be used to fill your battery, ensuring your reduce your dependency on peak import rates even further.
The correct battery size will depend on your daily consumption and energy usage patterns. If you plan to install a heat pump or purchase an EV in the future, it would be advisable to install a modular system that can be expanded in the future.
SolarTherm UK conducts a detailed load analysis to recommend the optimal battery capacity for your household.
Is a 5kW Solar System Right For Your Home?
A 5kW system is typically suitable if:
- You live in a 3-5 bedroom home
- Your annual electricity usage is moderate to high
- You have sufficient unshaded roof space
- You want meaningful reductions in your energy bills
- You’re considering battery storage or installing an EV charger or heat pump in the future
Every property is unique. Roof direction, shading and lifestyle patterns all influence system design and return on investment.
Why Choose SolarTherm UK?
At SolarTherm UK we don’t believe in a one size fits all approach to solar. That’s why every system we install is bespoke to the property and energy usage profile. Our dedicated, local MCS accredited installers work with you from your very first enquiry, to system design, installation and long after your system is installed, providing an all round service, to keep your system running efficiently for 30 years or more.
Contact SolarTherm UK today for a free, no obligation quote and design, tailored to your property, usage and future energy needs. No hard sell, just honest, expert advice – and the time you need to make an informed decision.
Your home. Your energy. Your future.
