Solar Wars is live: claim your county, sync your daily kWh and compete on the UK solar leaderboard. How it works and how to join.
Claim your county — iOS open beta now live
Download Sun Hours free from the App Store, tap the Solar Wars card on your dashboard, sign in with Apple, and pick your tribe. Your daily kWh syncs automatically. The public heatmap is live right now at [sunhours.app/solarwars](/solarwars) — no sign-in required to see where your county stands.
Which UK county has the best solar?
We've always known the sun doesn't shine the same everywhere in the UK. Cornwall gets more peak hours than County Durham. Kent catches better angles than Cumbria. But nobody had tracked it properly — county by county, day by day — using real household solar data.
Until now.
See the live UK county leaderboard at sunhours.app/solarwars →
How Solar Wars works
Sun Hours users already log their daily kWh generation — that number is what calibrates the app's forecast. Solar Wars syncs that same figure to a county leaderboard, contributing your kilowatt-hours to your county's daily average.
The county with the highest average daily generation across its players leads the map. The leaderboard updates live. The public heatmap shows which counties are lit up and which are in the shade — visible to anyone at sunhours.app/solarwars without signing in.
Pick your tribe
When you join Solar Wars, you claim one of the 73 UK ceremonial counties — your tribe. Every kWh you generate goes toward its average and its position on the leaderboard.
You can switch county once every 30 days. Choose wisely.
What's on the leaderboard
- Map — a live UK heatmap. Counties with higher average generation glow brighter.
- Ranks — the full county standings sorted by average kWh/day per player. Filter by month, year, or all time.
- World — how the UK sits against countries with Sun Hours users worldwide.
- Me — your personal generation log, your county's current position, and your trophy progress.
Trophies — earned over months, not days
Solar Wars has a trophy system, but it's not built for the first week. Streak trophies run from 7 consecutive days all the way to a full year. Volume trophies start at 50 kWh and scale to 10,000. Live trophies — for your county or country leading the leaderboard — transfer whenever the top spot changes.
The goal is a long-term record of genuine solar generation, not a sprint to unlock badges.
How to join — iOS only, open beta
Solar Wars is live now inside the Sun Hours app on iPhone.
- Download Sun Hours free from the App Store →
- Set your postcode and best-day kWh as normal
- Tap the Solar Wars card on your dashboard
- Sign in with Apple, pick a username and your county
- Your generation syncs automatically from that point on
The public heatmap is live right now at sunhours.app/solarwars. No sign-in required to see where every county currently stands.
This is an open beta. Data may be reset before full launch. Android support is coming. If you have solar panels on a UK roof and an iPhone — your county needs you.
Further reading
It’s Official: Plug-In Solar Becomes Legal in the UK on 27 August 2026
Plug-In Solar · 5 min read
Your Plug-In Kit Doesn't Come With a Forecast. We Fixed That.
Solar Apps · 3 min read
What's Actually Going On With Plug-In Solar in the UK Right Now?
Plug-In Solar · 3 min read
Predicting Sun Hours in the UK: The 8-Second Check (and When You Need Something More)
Solar Tools · 4 min read
The Omega Heatwave and Your Solar Panels
UK Solar · 4 min read
Claim your county — iOS open beta now live
Download Sun Hours free from the App Store, tap the Solar Wars card on your dashboard, sign in with Apple, and pick your tribe. Your daily kWh syncs automatically. The public heatmap is live right now at [sunhours.app/solarwars](/solarwars) — no sign-in required to see where your county stands.