Lumen Slate 430
All-black panels that sit flat on slate and tile, so they look like part of the roof.
- Output430 W
- Efficiency22.4%
- Warranty25 years
Store the midday sun.Spend it after dark.
Panels and a home battery sized for your roof and your habits, so the power you make at lunchtime keeps the lights, the oven and the telly going long after sunset.
What could your roof do?
Move the sliders to match your home. We use typical figures for a south-east facing slate roof in central England; a survey replaces them with yours.
- Estimated yearly saving
- £1,020
- System size
- 4.3 kWp
- Yearly generation
- 3,900 kWh
- Evenings covered
- 78%
- Installed price
- £9,800
- Payback
- 9.6 years
Illustrative estimate only, using a 27p unit rate and 15p export rate. Real figures depend on roof pitch, shading, your tariff and how you use power.
From photos to power in about three weeks.
Photos, not ladders
Send a few phone photos of your roof, fuse board and meter. We check the roof against satellite and shading data.
A design you can see
A panel layout drawn on your own roof, a fixed price and an honest payback figure. No commission-led sales visits.
One day on the roof
Scaffold goes up the day before. Panels, battery and inverter are fitted in a day, usually with the power off for under two hours.
Switch on, then watch
Our app shows what the roof made, what the battery stored and what you exported, minute by minute.
The kit
Three parts, one warranty, one number to call. Product names and specifications are fictional.
Lumen Cell
A slim wall battery for a side return, garage or utility room. Stacks from 5 to 15 kWh.
- Capacity5 kWh per module
- Depth14 cm
- Warranty10 years
Lumen Hub
The inverter and the app. Charges the battery from cheap night tariffs when the forecast is grey.
- Inverter5 kW hybrid
- BackupEssential circuits
- AppiOS and Android
Pay up front, or spread it.
Most customers pay a deposit and the balance on switch-on. You can also spread the cost over five or ten years.
Example only: £9,800 system, £980 deposit, 120 monthly payments of £96 at 6.9% APR representative. Not a real offer.
Will it work on a north-facing roof?
Usually, at about 60 to 70 percent of a south-facing roof. East and west roofs are often better for evenings than people expect.
Do I need planning permission?
Rarely. Most homes fall under permitted development. Conservation areas and listed buildings need a check first, and we do that during the design.
What happens in a power cut?
With the backup option, the hub keeps your fridge, lights and router running from the battery and the panels.
Is a battery worth it without solar?
Sometimes. On a time-of-use tariff it can fill up overnight at a low rate and run the house through the expensive evening peak.