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Price per watt leaderboard
Every kit, inverter and battery in stock today, ranked by what you pay for each watt or kWh. Compliant kits first, at the cheapest price we can find right now.
- cheapest compliant kit: UKSOL Pro Max 1260W Hybrid Mount Kit
- 76p /Wp
- median of 16 compliant kits in stock
- 91p /Wp
- cheapest microinverter output
- 14.8p /W
Prices from our own checks of UK retailers, . Only products in stock now are ranked.
In stock now, at the cheapest retailer we track. Highlighted = cheapest per Wp. AC output is the inverter’s limit; plug-in kits are capped at 800 W.
Top of each table
Cheapest inverters and storage right now
The best value in each of the other categories today. Switch category in the table above to see them all.
Inverters: price per W
Hoymiles HiFlow HF-800-WB Microinverter£118.80 · 800 W14.8p
Hoymiles HiFlow 800 Microinverter£119.99 · 800 W15.0p
APsystems EZ1-M Microinverter (800VA)£119.99 · 799 W15.0p
EcoFlow STREAM Microinverter£129 · 800 W16.1p
Hoymiles HMS-800-2WB Microinverter£139 · 800 W17.4p
1 more in stock without a rated output in our data.
Batteries: price per kWh
Indevolt BK1600 Plug-in Home Battery£399 · 1.64 kWh£244
Zendure SolarFlow 2400 AC+£899 · 2.40 kWh£375
Zendure SolarFlow 2400 Pro£1,099 · 2.40 kWh£458
Thunder Vault 1.92 kWh Plug-In Home Battery£1,049.99 · 1.92 kWh£547
7 more in stock without a capacity in our data.
Power stations: price per kWh
Anker SOLIX C1000 Gen 2£474 · 1.02 kWh£463
Anker SOLIX C2000 Gen 2£999 · 2.05 kWh£488
BLUETTI Apex 300£1,599 · 2.76 kWh£578
BLUETTI AC70 + 100W Solar Panel£648 · 0.77 kWh£844
11 more in stock without a capacity in our data.
Inverters and batteries bought on their own aren’t plug-in kits. Each ENA register entry covers a complete kit, so only a listed kit is compliant (DESNZ product specification). Batteries with a built-in inverter need an electrician.
How we work it out
What the numbers mean
- Kits: today’s cheapest in-stock price ÷ total panel power in watts-peak (Wp), from the maker’s spec or the retailer’s listing.
- Inverters: price ÷ rated AC output in watts, from the spec sheet of a kit that uses the same model, or the product name.
- Batteries and power stations: price ÷ capacity in kWh, from the maker’s spec. Products without a published capacity in our data are left out.
Delivery, mounting extras and fitting aren’t included. Some retailers sell the same product in bundles; we rank the cheapest in-stock one.
Before you buy
Why cheapest per watt isn’t always best
Plug-in kits can feed at most 800 W into your home (SI 2026/848). Panels bigger than that still help on dull days, but on bright days the extra is clipped. So a 1,200 Wp kit doesn’t make 50% more than an 800 Wp one.
Where the panels go matters too. Use the calculator for the cost of each kWh a kit will make at your home, or the bundle vs build tool to see what the panels in a kit cost you.
Price per watt: questions
What is a good price per watt for plug-in solar?
Across the 16 ENA-compliant kits in stock today, the median is 91p per Wp of panel. The cheapest is the UKSOL Pro Max 1260W Hybrid Mount Kit at 76p per Wp (£963.04 for 1,260 Wp), and the dearest is 148p. Anything under the median is good value on this measure.
Are bigger kits cheaper per watt?
Usually. In stock today, one-panel compliant kits have a median of 119p per Wp and two-panel kits 84p. The inverter, plug and cabling cost about the same whatever the panel size, so they add more per watt to a small kit.
Is price per watt the best way to compare kits?
It’s a quick first filter, but not the whole story. Every plug-in kit is capped at 800 W of AC output, so panel watts above that are clipped on sunny days. And where the panels go matters as much as their size: an upright balcony kit makes less than the same kit tilted towards the sun. For the cost of each kWh you’ll actually get, use the calculator.
How much does a plug-in solar microinverter cost on its own?
The cheapest 800 W microinverter in stock today is the Hoymiles HiFlow HF-800-WB Microinverter at £118.80. A standalone inverter isn’t a compliant plug-in kit, though: each ENA register entry covers a whole kit.
What does battery storage cost per kWh?
The cheapest plug-in battery per kWh in stock today is the Indevolt BK1600 Plug-in Home Battery at £244 per kWh of capacity, against £416 for the median of the 4 we can rank. Batteries with built-in inverters fall outside the plug-in solar rules and need an electrician.
Where do the prices come from?
Our own checks of UK retailers. Each product shows its cheapest in-stock price right now. Products that are out of stock everywhere, or that we don’t have a rated output or capacity for, are left out rather than guessed.
Sources
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Plan the rest of your setup
- Price trackerPrice history, drops and lows for every product
- Bundle vs buildKit price vs its parts bought separately
- Cost per kWhLifetime cost of solar vs the grid rate
- Battery paybackIs a battery worth adding to your kit?
- Export earningsWhat your spare solar is worth
- Tariff matcherWhich tariff gives the lowest bill with solar