Best Solar Panels: Top Brands & Models Reviewed By Our Experts
The best solar panels are the LONGi Hi-MO X10, the AIKO Neostar 3S and the JA Solar DeepBlue 4.0 Pro. The LONGi Hi-MO X10 is the best all-rounder, with 23.8% efficiency and a 30-year warranty. The AIKO Neostar 3S is best for smaller or partly shaded roofs, and the JA Solar DeepBlue 4.0 Pro offers the best value for money.
Choosing the best solar panels for your home can feel overwhelming. There are dozens of brands, hundreds of models and a lot of technical claims to wade through.
In this guide, we’ll compare each panel’s efficiency, price, warranty and real-world performance in UK weather. We’ll also explain which types of home each one suits best, and whether it’s the right choice if you want to cut your bills or power as much of your home as possible.
We install panels every week across London, Brighton, Oxford, Southampton, Bristol and Cardiff, so we’ve narrowed it down to the three we’d happily put on our own roofs.
3 best solar panels: At a Glance
The 3 best solar panels at a glance are the LONGi Hi-MO X10, AIKO Neostar 3S and JA Solar DeepBlue 4.0 Pro. Here’s how they compare side by side.
| Rank | Solar panel | Best for | Power output | Efficiency | Warranty | Est. installed cost (4kW) |
|---|---|---|---|---|---|---|
| 1 | LONGi Hi-MO X10 | Best overall | 485W | 23.8% | 30-year product and performance | £7,500 to £10,000 |
| 2 | AIKO Neostar 3S | Smaller and partly shaded roofs | 440W to 515W | 22.4% to 23.5% | 25-year product and performance | £8,000 to £11,000 |
| 3 | JA Solar DeepBlue 4.0 Pro | Best value | Around 430W to 450W | Up to around 23% | Up to 30-year performance, depending on version | £6,500 to £8,500 |
All three are monocrystalline panels from large, well-established manufacturers with strong UK distribution. Prices are estimates for a typical 4kW system, fully installed with 0% VAT, and will vary with your roof and location.
Not sure which panel suits your roof? EE Renewables provides expert solar panel installation and solar battery storage installation across Southern England, Greater London, South West England, and South Wales, including areas like London, Brighton, Oxford, Southampton, Bristol, and Cardiff. Use our online tool and get a free solar panel installation quote tailored to your location.
3 best solar panels: Ranked By Our Experts
The 3 best solar panels ranked by our experts are below, starting with our top pick. For each one, we’ve covered the key specs, efficiency, pricing, the homes it suits, reliability, lifespan and maintenance, so you can see exactly where it fits.
1. LONGi Hi-MO X10 485W: Best solar panel overall
The LONGi Hi-MO X10 is our top pick because it combines very high efficiency, a sleek all-black look and one of the longest warranties on the market. LONGi is one of the world’s largest solar manufacturers, and the Hi-MO X10 uses its latest back-contact cell design, which moves the wiring to the back of the cells so more of the front can soak up light.
For most UK homes, it strikes the best balance between performance, looks and long-term peace of mind.
Key specs at a glance
| Specification | Detail |
|---|---|
| Power output | 485W |
| Efficiency | 23.8% |
| Cell technology | HPBC 2.0 back-contact |
| Product warranty | 30 years |
| Performance warranty | 88.85% output after 30 years |
| Temperature coefficient | -0.26%/°C |
| Weight | 21.6kg |
| Expected lifespan | 30 years or more |
| Estimated panel cost | £90 to £120 per panel |
| Estimated installed system cost (4kW, around 8 panels) | £7,500 to £10,000 |
| Best suited to | Most UK homes, especially those with limited roof space |
LONGi Hi-MO X10 485W Efficiency
At 23.8%, the Hi-MO X10 turns more of the sunlight hitting it into electricity than most panels on the market. In practice, that means fewer panels are needed for the same system size. Around 8 panels make roughly a 4kW system, which is ideal for terraced houses and semis in London, Brighton and Bristol where roof space is tight.
LONGi Hi-MO X10 485W Pricing
Expect to pay around £90 to £120 per panel, with a typical 4kW system costing about £7,500 to £10,000 fully installed with 0% VAT. That’s more than budget panels, but the higher output per panel and longer warranty help make up the difference over the system’s life.
LONGi Hi-MO X10 485W: Properties it’s best suited to
The Hi-MO X10 suits almost any UK home, but it really shines on smaller roofs where every panel counts. Its all-black finish also blends in well on slate and dark tiled roofs, which is useful in conservation-minded areas of Bath, Oxford and central London.
LONGi Hi-MO X10 485W: Powering your home or cutting your bills
A 4kW system of Hi-MO X10 panels in the South typically produces around 3,500 to 4,000 kWh a year. That’s close to what a typical home uses in a year, but most of it arrives during the day and in summer. It’s best for cutting your bills while staying connected to the grid, and adding a battery lets you use much more of it in the evening. It’s not designed to take a typical home fully off the grid.
LONGi Hi-MO X10 485W: Reliability and performance
The back-contact design means there are no thin metal lines across the front of the cells, which improves looks and helps performance in partial shade. A temperature coefficient of -0.26%/°C means output drops less on hot summer days. LONGi’s scale and long track record also make it one of the most dependable names to back a 30-year warranty.
LONGi Hi-MO X10 485W: Lifespan
With a 30-year product warranty and a guarantee of 88.85% output after 30 years, the Hi-MO X10 is built for the long haul. In real terms, it should comfortably keep producing useful electricity for 30 years or more, well beyond the typical payback period.
LONGi Hi-MO X10 485W: Maintenance
Like all quality panels, the Hi-MO X10 needs very little looking after. Rain keeps it clean in most of the UK, although all-black panels can show dust more clearly. Check your monitoring app from time to time, and consider bird mesh if you live in a town or city.
LONGi Hi-MO X10 485W: Pros and cons
The LONGi Hi-MO X10 has very few weak points. Here’s how its strengths and drawbacks compare.
| Pros | Cons |
|---|---|
| Very high 23.8% efficiency, ideal for limited roof space | Warranty is manufacturer-backed, not insurance-backed |
| Strong 485W power output | Premium performance comes with a higher upfront panel cost |
| Clean all-black aesthetic suits most UK homes | |
| Industry-leading 30-year product and performance warranty | |
| Low annual degradation rate for long-term savings | |
| Widely available through UK installers |
Is the LONGi Hi-MO X10 best for you?
Choose the LONGi Hi-MO X10 if:
- You want the best all-round mix of efficiency, looks and warranty
- Your roof is small and you need to get the most from every panel
- You like the idea of a 30-year product warranty
- You want an all-black panel that suits period and modern homes alike
Do not choose the LONGi Hi-MO X10 if:
- Your budget is tight and you have plenty of roof space for cheaper panels
- You specifically want an insurance-backed panel warranty
- Your roof is heavily shaded for much of the day, where panel-level electronics matter more than the panel itself
Read our guide on the cost of solar panels in the UK.
2. AIKO Neostar 3S: Best solar panel for smaller and partly shaded roofs
The AIKO Neostar 3S earns its place thanks to outstanding efficiency and impressive performance in shade and warm weather. AIKO has become one of the leading names in back-contact solar cells, and the Neostar range is designed to squeeze the most electricity out of every square metre of roof.
If your roof is small, awkwardly shaped or partly shaded by chimneys, dormers or trees, this is the panel we’d look at first.
Key specs at a glance
| Specification | Detail |
|---|---|
| Power output | 440W to 515W |
| Efficiency | 22.4% to 23.5% |
| Cell technology | Back-contact |
| Product warranty | 25 years |
| Performance warranty | 90.3% after 25 years |
| Temperature coefficient | -0.22%/°C |
| Weight | 20.6kg |
| Expected lifespan | 25 to 30 years or more |
| Estimated panel cost | £100 to £130 per panel |
| Estimated installed system cost (4kW, around 8 panels) | £8,000 to £11,000 |
| Best suited to | Smaller, awkward or partly shaded roofs |
AIKO Neostar 3S: Efficiency
With efficiency of up to 23.5%, the Neostar 3S is among the most efficient home solar panels you can buy in the UK. That lets you fit a 4kW system on a smaller roof, which is a big advantage on terraced houses and homes with dormers or roof windows.
AIKO Neostar 3S: Pricing
The Neostar 3S sits at the premium end of the market, at around £100 to £130 per panel. A typical 4kW system costs about £8,000 to £11,000 fully installed with 0% VAT. You’re paying extra for efficiency and shade performance, so it offers the best value on roofs where those really matter.
AIKO Neostar 3S: Properties it’s best suited to
This panel suits homes where roof space is at a premium or shade is a problem, such as Victorian terraces in London and Bristol, homes with rear dormers, or properties near tall trees. Its low temperature coefficient also makes it a good fit for south-facing roofs that get very warm in summer.
AIKO Neostar 3S: Powering your home or cutting your bills
A 4kW system of Neostar 3S panels in the South typically produces around 3,600 to 4,100 kWh a year, and often a little more on partly shaded roofs than standard panels would manage. It’s ideal for cutting your electricity bills while staying on the grid. Pair it with a battery if you want to cover more of your evening use.
AIKO Neostar 3S: Reliability and performance
AIKO’s back-contact cells handle partial shade better than many standard panels, so a shadow from a chimney or dormer causes less of a drop in output. The -0.22%/°C temperature coefficient is one of the best available, meaning the panels lose very little output on hot days. The strong 90.3% output guarantee after 25 years also points to slow, steady ageing.
AIKO Neostar 3S: Lifespan
The Neostar 3S comes with a 25-year product warranty and a 25-year performance warranty. With its low degradation rate, you can expect it to keep producing useful electricity for 25 to 30 years or more.
AIKO Neostar 3S: Maintenance
Maintenance is minimal. Rain handles most of the cleaning, and a quick look at your monitoring app every month or so will flag any problems. On homes with nesting birds, bird mesh helps protect the cables underneath.
AIKO Neostar 3S: Pros and cons
The AIKO Neostar 3S is a standout performer, with only a few trade-offs to consider. Here’s a quick comparison.
| Pros | Cons |
|---|---|
| One of the highest efficiency ratings of any residential solar panel available in the UK | Higher-output AIKO versions can be physically larger, which may cause layout challenges on smaller UK roofs |
| Excellent shade performance thanks to back-contact cell design | Some higher-wattage variants use a white backsheet rather than all-black |
| Best-in-class temperature coefficient for hot weather output | Generally priced above budget and mid-range alternatives |
| 25-year product warranty with strong degradation profile | |
| Lightweight relative to its power output |
Is the AIKO Neostar 3S best for you?
Choose the AIKO Neostar 3S if:
- Your roof is small, awkwardly shaped or partly shaded
- You want to fit as much power as possible into limited space
- Your roof gets very warm in summer and you want strong hot-weather output
- You’re happy to pay a bit more for top-tier efficiency
Do not choose the AIKO Neostar 3S if:
- You have a large, unshaded roof where cheaper panels would do the job
- You want a guaranteed all-black look on the higher-wattage versions
- Keeping the upfront cost as low as possible is your main priority
3. JA Solar DeepBlue 4.0 Pro: Best value solar panel
The JA Solar DeepBlue 4.0 Pro makes our list because it delivers strong, dependable performance at a noticeably lower price than premium back-contact panels. JA Solar is one of the world’s biggest panel manufacturers, and the DeepBlue 4.0 Pro range uses modern N-type cells that perform well in the UK’s often cloudy conditions.
If you have a decent-sized roof and want the most solar for your money, this is a very sensible choice.
Key specs at a glance
| Specification | Detail |
|---|---|
| Power output | Around 430W to 450W for typical home versions |
| Efficiency | Up to around 23% |
| Cell technology | N-type |
| Product warranty | 12 to 25 years, depending on version |
| Performance warranty | 25 to 30 years, depending on version |
| Temperature coefficient | Around -0.29%/°C |
| Bifacial option | Yes, on glass-glass versions |
| Expected lifespan | 25 to 30 years or more |
| Estimated panel cost | £70 to £100 per panel |
| Estimated installed system cost (4kW, around 9 panels) | £6,500 to £8,500 |
| Best suited to | Larger roofs and budget-conscious buyers |
The DeepBlue 4.0 Pro comes in several versions, so check the exact datasheet for the model your installer quotes.
JA Solar DeepBlue 4.0 Pro: Efficiency
With efficiency of up to around 23%, the DeepBlue 4.0 Pro isn’t far behind the premium back-contact panels. You’ll typically need around 9 panels for a 4kW system, one more than with the LONGi or AIKO, so it works best where there’s a little more roof to play with.
JA Solar DeepBlue 4.0 Pro: Pricing
This is where JA Solar stands out. At around £70 to £100 per panel, a typical 4kW system costs about £6,500 to £8,500 fully installed with 0% VAT. For many households, that lower upfront cost means a quicker payback.
JA Solar DeepBlue 4.0 Pro: Properties it’s best suited to
The DeepBlue 4.0 Pro is a great fit for semi-detached and detached homes with a good-sized south, east or west-facing roof. It’s also popular with landlords upgrading several properties, where keeping costs down across a portfolio really matters. The glass-glass bifacial versions suit flat roofs, garages and ground-mounted systems.
JA Solar DeepBlue 4.0 Pro: Powering your home or cutting your bills
A 4kW system of DeepBlue 4.0 Pro panels in the South typically produces around 3,500 to 4,000 kWh a year. Like the others, it’s best for cutting your bills while staying connected to the grid, with a battery helping you use more of it in the evening. On a large roof, its lower price makes it easier to fit a bigger system and cover more of your electricity use.
JA Solar DeepBlue 4.0 Pro: Reliability and performance
JA Solar’s N-type cells handle low light well, which suits grey UK days, and degrade more slowly than older panel designs. The temperature coefficient is a little higher than the back-contact panels, but that matters less in the UK’s cooler climate. JA Solar’s size and global track record make it a dependable, widely supported brand.
JA Solar DeepBlue 4.0 Pro: Lifespan
Depending on the version, the DeepBlue 4.0 Pro carries a performance warranty of 25 to 30 years. Product warranties vary more between versions, from 12 to 25 years, so it’s worth checking. Either way, you can expect the panels to keep producing well for 25 to 30 years or more.
JA Solar DeepBlue 4.0 Pro: Maintenance
Maintenance is minimal. Rain keeps the panels clean in most areas, and your monitoring app will show if output drops unexpectedly. Bird mesh is a sensible extra on town and city homes.
JA Solar DeepBlue 4.0 Pro: Pros and cons
The JA Solar DeepBlue 4.0 Pro trades a little efficiency for a much friendlier price. Here’s how it stacks up.
| Pros | Cons |
|---|---|
| Excellent value for money per watt | Slightly lower efficiency than back-contact rivals |
| Modern N-type cells that perform well in low light | Product warranty can be shorter on some versions |
| Bifacial glass-glass versions for flat roofs and ground mounts | Visible lines on the front, so not quite as sleek |
| Made by one of the world’s largest panel manufacturers | Specs vary between versions, so the datasheet needs checking |
| Widely available through UK installers | Needs slightly more roof space for the same system size |
Is the JA Solar DeepBlue 4.0 Pro best for you?
Choose the JA Solar DeepBlue 4.0 Pro if:
- You want the best value for money from a trusted brand
- You have a good-sized roof with space for 9 or more panels
- You’re a landlord upgrading several properties on a budget
- You’re planning a flat roof or ground-mounted system and want a bifacial option
Do not choose the JA Solar DeepBlue 4.0 Pro if:
- Your roof is small and you need maximum efficiency from every panel
- A long product warranty is a priority and your chosen version has a shorter one
- You want the sleekest possible all-black finish
How We Chose the Best Solar Panels
We chose the best solar panels using our hands-on experience designing and installing systems on homes across Southern England, Greater London, South West England and South Wales. As an MCS certified installer, we only recommend panels we’d be happy to stand behind for decades, and we judged each one against the same criteria:
- Real-world UK performance: how well each panel performs in our cloudy, changeable weather, not just in laboratory test conditions.
- Efficiency: how much electricity each panel produces from a given area of roof, which matters on the smaller roofs common in our region.
- Shade and heat performance: how each panel copes with partial shade from chimneys, dormers and trees, and with warm summer days.
- Warranties: the length and strength of both the product and performance warranties, and how easy the manufacturer is to deal with in the UK.
- Degradation: how much output each panel is guaranteed to keep over 25 to 30 years.
- Manufacturer strength: the size, stability and track record of the company behind the warranty.
- Build quality and certification: strength against wind, snow and hail, and suitability for coastal homes exposed to salt air.
- Price and value: the upfront cost per panel and per system, weighed against output and warranty over the panel’s lifetime.
- Looks: how each panel suits UK homes, including period properties and conservation areas.
- Availability and support: whether panels and replacement parts are readily available through UK distributors.
Our recommendations are independent. Every home is different, so on your survey we’ll recommend the panel that genuinely suits your roof, usage and budget, not simply the most expensive one.
Ready to get a quote for the best solar panels from EE Renewables?
Getting a quote for the best solar panels from EE Renewables is free and there’s no obligation. We’ll survey your roof, check its size, direction and shading, and recommend whether the LONGi Hi-MO X10, AIKO Neostar 3S or JA Solar DeepBlue 4.0 Pro is the right fit for your home and budget.
Use our online tool and get your solar panel quote today.
Frequently Asked Questions
Are Chinese-made solar panels good quality?
Yes, Chinese-made solar panels from established manufacturers like LONGi, AIKO and JA Solar are among the best in the world. China produces the large majority of the world’s solar panels, including many premium models. If supply chains matter to you, ask your installer about the manufacturer’s sourcing and traceability commitments.
Are all-black solar panels less efficient?
All-black solar panels are only very slightly less efficient than panels with a white backing, if at all, and modern back-contact designs have closed the gap almost completely. They can run a touch warmer, but in the UK’s mild climate the difference in output is very small. Most homeowners choose all-black panels for their neater look.
Are bifacial solar panels worth it on a house roof?
Bifacial solar panels are rarely worth paying extra for on a standard pitched roof. They collect light from both sides, but on a pitched roof very little light reaches the back. They make more sense on flat roofs, carports and ground-mounted systems, where light can bounce up from the surface below.
Can you mix different solar panel brands on one roof?
You can mix different solar panel brands on one roof, but it’s best avoided unless there’s a good reason. Panels with different ratings can hold each other back when wired together. If mixing is unavoidable, such as when extending an older system, optimisers or a separate inverter input usually solve the problem.
Does the panel brand affect your export payments?
No, the panel brand doesn’t affect your export payments, as long as the system is installed by an MCS certified installer using MCS listed products. All three panels in this guide are widely used on MCS certified installations. Your Smart Export Guarantee rate depends on your chosen tariff, not the panel make.
