Panels 440 W
All-black monocrystalline panels, laid flush with your roof line.
- Rated for typhoon winds and snow load
- 25-year performance warranty
- Fitted to tile, slate or metal roofs
Made today18.4 kWh
Battery86%
From the grid0.0 kW
Solar + battery for Japanese homes 夕陽
The sun sets. Your lights don’t.
Rooftop solar and a home battery, installed and looked after by Sunset. ¥0 upfront, one fixed monthly plan, and a lower power bill from the first month.
Free roof check · An answer in two minutes
4,200Homes on Sunset
11 hrsLongest outage bridged
¥0Upfront, ever
25 yrsPanel warranty
Savings 節約
See what the sun is worth on your roof
Grid prices in Japan rise almost every year. Your own panels and battery don’t. Move the slider to your usual monthly bill and compare 25 years of power.
¥15,000 / mo
¥8,000¥40,000
You’d save¥3.1M
Every month, about¥10,300
Estimates over 25 years. Assumes grid prices rise 3% a year.
1 block = ¥1M of power bills over 25 years
How it works 仕組み
Three evenings from sign-up to sunset
- 01
Check
We measure your roof from above and on site: sun hours, shade, tile type and load. You get a plan and a fixed price.
- 02
Install
A certified crew fits panels, battery and inverter in a single day. Permits and utility paperwork are ours to handle.
- 03
Power on
Tonight your home runs on today’s sun. Production, storage and savings are live in the app.
Hardware 設備
What goes on your home
Three pieces, sized to your roof and your evenings. We own, insure and maintain all of it for as long as you’re on a plan.
Battery 13.5 kWh
A quiet cabinet clad in hinoki, on the wall by your meter.
- Takes over in milliseconds when the grid drops
- Runs a typical home through the night
- 10-year warranty, serviced by us
The app iOS · Android
Your house, live: what the roof makes, what the battery holds, what you saved.
- Outage and storm alerts
- Weather-aware charging before typhoons
- Monthly savings, to the yen
Plans 料金
Three ways to go solar
Pay once, spread it out, or pay nothing upfront. Every option gets the same panels, battery, crew and app.
Own it
Buy outright
¥1.9M from
The lowest cost over 25 years, if you can pay upfront. Yours from day one.
- Eligible for local subsidies
- Optional service plan
Spread it
Solar loan
¥14,800 / mo
Over 12 years at 1.9% APR. You own the system and keep every yen it saves.
- Pay off early, no fees
- Service included for 12 years
Most chosen
Sunset Plan
¥6,800 / mo · from
¥0 upfront, one price fixed for 20 years. We own, insure and maintain everything.
- Battery backup included
- Buy it out any time after year 5
Coverage 地図
A network of homes, sharing the evening
Sunset homes in 31 cities store daylight and lend it to the grid when the country needs it most. Each new roof makes the whole network steadier.
Sapporo 札幌184
Tokyo 東京640
Osaka 大阪571
Fukuoka 福岡298
Okinawa 沖縄
Naha 那覇52
4,200Homes connected
31Cities from Sapporo to Naha
58 MWhShared with the grid last month
Homeowners お客様の声
“Last autumn’s typhoon took the street’s power for eleven hours. Our lights never flickered, and the bill is down to a few thousand yen.”
Keiko TanakaKamakura · Sunset Plan since 2023
Monthly bill−87%
The panels sit so flat on the kawara you’d never know.
Keiko TanakaKamakura
¥20,900 / mo saved
We watch the battery fill while we eat. The kids call it the sun jar.
Hiroshi MoriOnomichi
¥14,200 / mo saved
One crew, one day, and no paperwork on my side at all.
Aya SatoSendai
¥11,600 / mo saved
FAQ 質問
Questions, answered
Still unsure? A Sunset advisor will walk your roof with you, free, and answer the rest.
Everything: panels, battery, inverter, installation, permits, monitoring, insurance and repairs. You pay one fixed monthly price for 20 years and nothing else.
Yes. We use tile hooks that sit under the kawara without drilling through it, and we replace any tile we lift. Slate and metal roofs are simpler still.
The battery takes over in milliseconds and keeps your essentials running: lights, fridge, router and outlets. Before a storm the app tops the battery up from the grid automatically.
Most homes cut their bill by 60–85%. Your roof check gives you a written estimate based on your sun hours, shading and the last twelve months of your bills.
The plan transfers to the buyer, and homes with solar and storage tend to sell faster. You can also buy the system out at any point after year five.
If you buy outright or take the loan, we file every subsidy you qualify for. On the Sunset Plan the subsidy is already built into your lower monthly price.
We do. We monitor every system remotely, and if something drops below its expected output a technician is booked before you notice.
About three weeks from signing to switch-on, most of it permits. The crew is on your roof for a single day.
Get started はじめる
Tonight, run on today’s sun
Tell us your postal code. We’ll check your roof from above and send a plan and a fixed price within two days.
