500W Solar Panels: Output, Size & Are They Worth It?
Now a mainstream premium rooftop size — and a clever way to fit more power on less roof. Here’s what 500W panels produce, the top brands, and whether they’re right for you.
The short answer
Unlike smaller portable panels, 500W is now a mainstream premium rooftop panel size — modern residential panels have grown to 450–500W+, and 500W sits at the high-performance end. A single 500W panel produces around 2–2.5kWh on a good UK summer day, and a system of them (eight = 4kW, twelve = 6kW) adds up fast.
Their key advantage: power density — because each panel makes more, you fit more capacity in less roof space, or hit your target size with fewer panels. That’s genuinely useful on smaller UK roofs. Leading brands like Aiko and DMEGC offer 500W panels with high efficiency (22–24%) and sleek all-black looks. The small trade-off: they’re a bit larger/heavier (~1.95 × 1.13m, ~23–27kg). For most homes, a strong modern choice. Here’s the full guide (plus a note on portable 500W use).
What this guide covers
A few years ago, 500W was a commercial or portable figure. In 2026 it’s firmly a premium home-roof panel wattage — and an increasingly popular one, because fitting more power into limited roof space is exactly what a lot of UK homes need. Here’s what you get with 500W.
Output & how many panels you need
A single 500W panel generates roughly 2–2.5kWh on a good UK summer day (less in winter), or about 425–475kWh per year in typical UK conditions. Of course, a home uses several — here’s how they build into systems:
| Panels (500W) | System size | Suits |
|---|---|---|
| 8 panels | 4kW | Many typical homes |
| 10 panels | 5kW | Larger family homes |
| 12 panels | 6kW | Big homes / battery + EV |
Because 500W panels are high-wattage, you need fewer of them to reach a given system size than with lower-rated panels — see our system sizes guide for the full ladder. The exact number for your home depends on your usage, roof and whether you’re adding a battery, which a proper roof assessment pins down.
The big advantage: more power, less roof
Why high-wattage panels matter on UK roofs
Here’s the real reason 500W panels have taken off: power density. Because each panel produces more, you can either fit more total capacity onto a limited roof, or reach your target system size with fewer panels. On many UK homes — compact terraces, roofs broken up by chimneys and windows, or roofs where only one pitch faces the right way — roof space is the real constraint, not budget. High-wattage 500W panels squeeze the most generation out of every square metre, which can be the difference between a 3kW and a 4kW system on the same roof. That’s genuinely valuable, and it’s why premium high-efficiency panels (which tend to be the 450–500W+ models) are so popular for space-limited installs. If your roof is on the smaller side, 500W panels are well worth asking your installer about.
Top 500W panel brands
The 500W space is dominated by premium, high-efficiency brands:
| Brand | Notable for |
|---|---|
| Aiko (Neostar) | ABC all-back-contact tech, up to ~24% efficiency, sleek all-black |
| DMEGC | N-Type all-black, ~22.6% efficiency, strong warranties |
| Evolution Max | Popular UK-available 500W residential module |
| Astronergy / others | Tier-1 high-output options |
Aiko‘s Neostar range uses ABC (All Back Contact) technology — hiding the electrical contacts behind the cell for a completely black front and class-leading efficiency (up to ~24.6%). DMEGC‘s all-black N-Type 500W panels pair high efficiency (~22.6%) with strong warranties (often 20-year product, 30-year power) and are well-regarded by installers. Both look superb on a roof — all-black aesthetics are a real draw for homeowners who want solar to look like a design feature, not something bolted on. Many appear in “best panel” lists; see our best solar panels guide for how they compare. Several 500W panels are also bifacial (double-glass, generating from reflected light too).
Size, weight & dimensions
A 500W panel is slightly bigger than a standard 400–450W one — the trade-off for more power. Typical dimensions:
- Size: around 1950mm × 1134mm (~1.95m × 1.13m).
- Thickness: ~30–35mm.
- Weight: ~23–27kg (double-glass/bifacial models are heavier).
For most roofs this is no issue, but if space is very tight, it’s worth checking the specific panel’s dimensions against your available area — occasionally a slightly smaller 450W panel fits a tricky roof better. Your installer works this out as part of the roof layout.
How much do 500W panels cost?
An individual 500W panel is typically £90–£180 (premium all-black/bifacial at the top end). But for home solar, the panel is only part of the cost — a full installed system includes the inverter, mounting, scaffolding, labour and often a battery. A typical 4kW system of 500W panels installed runs around £5,000–£8,000, a 6kW system more. 0% VAT applies to eligible installs until 31 March 2027. As always, get a few quotes to compare fairly.
Portable 500W solar panels
While 500W is mainly a rooftop size, there’s a smaller portable/off-grid use too. For campervans, boats and off-grid setups, a 500W array is powerful — comfortably running a fridge, lighting, pump and charging with a suitable leisure battery and MPPT controller. One practical note: because a single 500W rigid panel is large and unwieldy, many van builders use two smaller panels (e.g. 2 × 250W) wired to 500W for easier mounting, though single 500W rigid, flexible and foldable options exist. If you’re researching solar for a vehicle rather than a home, that split-panel approach is often more practical. For smaller portable needs, see our 300W and 400W panel guides.
500W panels: the honest summary
✓ Great for
- Home roofs — a premium mainstream size
- Fitting more capacity in less roof space
- Fewer panels for the same system size
- Smaller / awkward UK roofs
- Premium all-black looks (Aiko, DMEGC)
- ~2–2.5kWh per panel on a good summer day
✗ Worth noting
- Slightly larger/heavier than 400–450W
- Check dimensions on very tight roofs
- Premium panels cost a bit more
- For vans, 2 smaller panels often easier
- Panel price is only part of system cost
Frequently asked questions
How much power does a 500W panel produce?
Around 2–2.5kWh on a good UK summer day per panel, or ~425–475kWh per year. A home uses several: eight 500W panels make a 4kW system, twelve make 6kW. Real output varies with sunlight, direction and shading.
Are 500W panels good for home use?
Yes — excellent, and increasingly popular. Their power density lets you fit more capacity in less roof space, or use fewer panels. Brands like Aiko and DMEGC offer high efficiency (22–24%) and all-black looks. Slightly larger/heavier than 400–450W panels is the only real trade-off.
What size is a 500W panel?
Around 1950 × 1134mm (~1.95 × 1.13m), ~30–35mm thick, ~23–27kg (bifacial/double-glass heavier). Slightly bigger than a 400–450W panel — worth checking against your roof space if it’s tight.
How many 500W panels do I need?
Eight make a 4kW system, ten make 5kW, twelve make 6kW. Being high-wattage, you need fewer than with lower-rated panels. The right number depends on your usage, roof and battery plans — a roof assessment sizes it accurately.
How much do they cost?
~£90–£180 per panel (premium all-black/bifacial at the top). A full installed 4kW system runs ~£5,000–£8,000, 6kW more, including inverter, mounting and labour. 0% VAT until 31 March 2027. Get quotes to compare.
Can you get a portable 500W panel?
Yes, though it’s large for portable use — many van builders use 2 smaller panels (e.g. 2 × 250W) wired to 500W for easier mounting. Single rigid, flexible and foldable 500W options exist. Powerful for off-grid with a leisure battery and MPPT controller.
A premium size that fits more power on less roof
The bottom line: 500W is now a mainstream premium rooftop panel size, and a smart one — its power density lets you fit more capacity in less roof space, or use fewer panels. Premium brands like Aiko and DMEGC bring high efficiency (22–24%) and sleek all-black looks. They’re slightly larger and heavier than 400–450W panels, so check dimensions on very tight roofs. For portable/van use, two smaller panels are often more practical. For homes, a strong modern choice.
Get my free quotes →The verdict
The 500W panel has grown up: once a commercial or portable figure, it’s now a mainstream premium size for home roofs. Its standout benefit is power density — fitting more generating capacity into limited roof space, or reaching your target system size with fewer panels. On the many UK homes where roof space is the real constraint, that’s genuinely valuable. Add the high efficiency and sleek all-black looks of brands like Aiko and DMEGC, and it’s easy to see the appeal.
The honest caveats are minor: 500W panels are slightly larger and heavier than standard 400–450W ones, so on a very tight roof it’s worth checking the exact dimensions, and for a campervan two smaller panels are often easier to mount than one big module. But for the vast majority of home installs, 500W panels are a strong, future-facing choice. The best way to see whether they suit your roof — and how big a system you could fit — is a couple of free, no-obligation quotes from MCS-certified installers.
Important
Going Solar UK is an introduction service, not an installer or panel retailer. Output figures, dimensions and prices here are indicative 2026 generalisations and vary by panel, brand, weather, roof and location. For home solar, always get a professional assessment and quotes from MCS-certified installers. Portable and off-grid setups should follow the manufacturer’s guidance and be installed safely.
We may receive a commission when we introduce you to an installer, at no cost to you. Any contract for work is directly between you and the installer.