Choosing between the best solar companies in the UK is about more than finding the lowest quote. A good solar installer should combine MCS-certified installation, sensible system design, clear warranties, reliable aftercare and equipment suited to your home, energy use and future plans.
For 2026, we’ve shortlisted three UK solar installation companies that stand out for different homeowner needs: full-service support, smart energy integration and simple online quotes with fixed-price options.
Best for Full-Service Solar Installation — Joju Solar
Best for Smart Energy & Tariffs — Octopus Energy
Best for Simple Online Quotes & Value — Heatable
Quick Comparison of the Best Solar Companies UK
| Company | Best For | Coverage | Solar PV | Battery Storage | EV Charging | MCS | Main Limitation |
|---|---|---|---|---|---|---|---|
| Joju Solar | Full-service installations | UK-wide teams / multiple offices | Yes | Yes | Yes | Yes | Premium service may cost more |
| Octopus Energy | Smart energy and tariff integration | Eligible UK properties | Yes | Yes | Integrated wider EV ecosystem | Yes | Some roof and property types excluded |
| Heatable | Simple online quotes and value | Nationwide domestic | Yes | Yes | Yes | Yes | Online process may suit straightforward projects best |
Coverage, installation availability and property eligibility should always be confirmed before requesting a quote. A company may operate nationally but still apply restrictions based on roof type, electrical setup, location or project complexity.
Best Overall Solar Installer — Joju Solar
Joju Solar earns the overall award because it offers a broad, full-service approach to domestic solar installation. It supports solar PV, battery storage, EV charging, system design and ongoing maintenance rather than focusing only on the initial panel installation.
It is particularly suitable for homeowners planning a battery or EV charger, or those with a property requiring more detailed design work. Its MCS certification, RECC membership, multiple offices and installation teams provide useful reassurance when comparing solar installers in the UK.
Joju may not be the cheapest option for a simple installation, but its technical support, equipment options and aftercare make it a strong choice for homeowners prioritising long-term service.
| Detail | Joju Solar |
|---|---|
| Best for | Full-service solar installations |
| Solar PV | Yes |
| Battery storage | Yes |
| EV charging | Yes |
| MCS certified | Yes |
| RECC member | Yes |
| Coverage | Multiple offices and installation teams across the UK |
| Aftercare | Maintenance and ongoing support available |
Best For
- Full solar installations
- Solar and battery systems
- EV charging
- Bespoke projects
Pros
- Strong technical expertise
- Solar, battery and EV services
- MCS and RECC accredited
- Good aftercare
Cons
- May cost more
- Warranties vary by equipment
- Premium service may be unnecessary for simple installations
Best for Smart Energy & Tariffs — Octopus Energy
Octopus Energy is strongest where solar, battery storage and electricity tariffs are being considered together. Its installation service connects generation, battery storage, electricity use and export payments through a wider smart-energy ecosystem.
This can simplify the customer journey, particularly for existing Octopus customers or homeowners interested in smart tariffs and exporting surplus electricity. As a large national energy brand, Octopus also has strong independent customer feedback.
However, Octopus is not suitable for every property. Its current installation criteria can exclude certain roof types, electrical configurations and other property characteristics. Homeowners should check eligibility before assuming the integrated service is available.
| Detail | Octopus Energy |
|---|---|
| Best for | Smart energy and tariff integration |
| Solar PV | Yes |
| Battery storage | Yes |
| MCS certified | Yes |
| TrustMark / NAPIT | Yes |
| Smart tariffs | Major strength |
| Export tariffs | Integrated |
| Main restriction | Not all roofs and property types are currently eligible |
Best For
- Octopus customers
- Smart tariff users
- Solar and battery systems
- Straightforward pitched-roof installations
Pros
- Excellent smart-tariff integration
- Strong battery and export ecosystem
- MCS-certified installation
- Large national energy brand
Cons
- Property eligibility is more restrictive
- Not suitable for every roof type
- Less flexible for unusual or bespoke installations
Best for Simple Online Quotes & Value — Heatable
Heatable suits homeowners who want a quick, low-friction route to solar. It offers fixed online quotations, MCS-certified installation, battery storage and EV charging, with nationwide domestic coverage.
Its online design and quotation process can make it easier to get an initial price without lengthy sales appointments. The company also offers equipment from several established manufacturers and has customer feedback through Which? Trusted Traders.
It is best suited to straightforward projects. Homeowners with unusual roofs, complex electrical requirements or highly bespoke designs should check that the proposed system, warranties, installation scope and aftercare meet their needs.
| Detail | Heatable |
|---|---|
| Best for | Simple online quotes and value |
| Solar PV | Yes |
| Battery storage | Yes |
| EV charging | Yes |
| MCS certified | Yes |
| HIES member | Yes |
| Tesla-certified | Yes, for Powerwall installation |
| Coverage | Nationwide domestic |
| Pricing approach | Fixed online quotations |
Best For
- Straightforward domestic solar installations
- Homeowners wanting an online quote
- Solar and battery systems
- Tesla Powerwall installations
- Buyers who value upfront pricing
Pros
- Fixed online pricing
- Nationwide MCS-certified installation
- Strong independent customer feedback
- Good battery choice
- Solar, battery and EV services
- Straightforward buying process
Cons
- Best suited to straightforward projects
- Less bespoke than specialist installers like Joju
- Equipment options depend on the package
- Check warranty terms for each component
Also Consider — Geo Green Power
Geo Green Power is a premium option for Midlands homeowners seeking domestic solar, battery storage and EV charging. Its MCS, NICEIC and RECC credentials, together with its focus on higher-specification systems, make it worth considering.
Coverage is more geographically focused than the nationwide companies above, so confirm availability for the specific property. Check any extended workmanship cover against the relevant service arrangement rather than assuming it is an unconditional guarantee.
What Does Solar Panel Installation Cost in the UK?
The cost of solar panel installation depends on system size, roof access, equipment, battery storage, scaffolding, electrical work and property complexity.
Current UK Benchmark
The latest Energy Saving Trust benchmark for a typical domestic system is approximately:
- 4.5kWp system
- Around £7,600 installed
- Actual costs vary according to roof access, equipment, battery storage and property complexity
Adding battery storage can increase the upfront cost substantially, although it may improve the use of self-generated electricity and reduce reliance on grid power.
Typical Payback
Current Energy Saving Trust modelling suggests a typical payback period of roughly 9–12 years, depending on location, household energy use, export payments, electricity prices, system performance and roof conditions.
Payback should therefore be treated as an estimate rather than a guaranteed outcome.
VAT
Qualifying professionally installed solar systems can currently benefit from 0% VAT in Great Britain. Northern Ireland rules differ, so homeowners should confirm how VAT applies to their location and the specific work included in the quote.
How to Choose a Solar Installer
When comparing solar companies in the UK, focus on the quality of the proposed system and the support behind it rather than price alone.
| What to Check | What to Look For |
|---|---|
| MCS certification | A currently certified installer working to recognised UK standards |
| Quotes | Compare at least three written quotes with clear equipment and installation costs |
| System design | A proposal based on your roof orientation and shading, electricity use and future plans |
| Warranties | Separate cover for workmanship, panels, inverter and battery |
| Reviews & aftercare | Recent feedback, clear support arrangements and evidence of good fault handling |
| Future flexibility | Battery, EV charging or system expansion options where relevant |
A good solar installer should be able to explain why the proposed system suits your property rather than simply offering a standard package.
FAQs
Aim for at least three quotes from MCS-certified installers so you can compare system design, price, warranties and aftercare.
Yes. MCS certification provides recognised installation standards and is important if you want to access schemes such as the Smart Export Guarantee.
Start by checking MCS certification, then compare at least three written proposals. Look at the system design, equipment brands, warranties, expected generation, installation timescales and aftercare. Recent customer feedback can help, but it should support rather than replace a detailed comparison of the quotes.
Not necessarily. Local installers can offer strong local knowledge and personal service, while larger companies may provide wider support networks and integrated tariffs or finance. Compare the actual proposal and aftercare rather than choosing on company size alone.
