Best Apps for Solar UK Users in 2026

Solar UK: sunshine is precious — make the most of it

If you've got solar panels on your UK roof, you already know the core challenge. Sunshine in Britain is unpredictable, the days are short for half the year, and getting genuinely useful information about what your system is doing — or is about to do — usually requires wading through apps designed for installers, not homeowners.

The good news is that a small ecosystem of apps has emerged that actually works for Solar UK homeowners. Some forecast your generation. Some help you manage your tariff. Some make sure surplus solar charges your car before it hits the grid. Together, they form a stack that helps you squeeze every watt from every ray.

If you spend any time in communities like r/SolarUK on Reddit, you'll see the same questions come up constantly: which app do you use to know when to run the dishwasher? How do I track my SEG payments? What's the best free solar forecast app? This post answers all of those — with the apps the Solar UK community actually recommends.

Here are the five best apps for Solar UK users in 2026 — starting with four strong complementary tools, and ending with the one that ties it all together.

1. Octopus Energy — Smart tariff and export management

Best for: Solar UK homeowners on Agile, Flux, or smart export tariffs

If you're generating solar in the UK without a smart export tariff, you're leaving money behind. The Octopus Energy app is the go-to for managing time-of-use pricing and Smart Export Guarantee (SEG) payments — both of which reward solar panel owners directly.

What makes it useful for Solar UK users:

• Real-time electricity pricing shows you when to import from the grid versus lean on your stored solar
• SEG tracking lets you see what you're earning from exported generation
• Agile Octopus rates update every 30 minutes — timing your dishwasher or washing machine to a grid price dip is genuinely worth it
• Available on Android and iOS with a clean, UK-native interface

Octopus has built their entire product around the household that generates solar. Pairing their app with a daily solar forecast (more below) gives you both sides of the energy picture at once.

Available: Android & iOS | Free | octopus.energy

2. myenergi (Zappi & Eddi) — Solar-powered EV charging and hot water

Best for: Solar UK households with an EV or immersion heater

The myenergi app controls two of the most popular solar-smart devices in the UK: the Zappi EV charger and the Eddi solar diverter. Both are engineered from the ground up to consume your solar surplus before drawing from the grid.

• Zappi automatically charges your EV using excess solar — your car runs on sunshine, not grid electricity you're paying for
• Eddi routes surplus solar into your hot water tank instead of exporting at low SEG rates
• Real-time monitoring shows solar input, grid import/export, and device consumption simultaneously
• Schedule boost modes around your solar forecast window
• Designed and made in the UK, built for UK grid connection specs

For any Solar UK household with an electric vehicle or an immersion heater, this is close to essential kit. Knowing when you'll generate (your forecast app) and automatically using that generation (Zappi/Eddi) is a genuinely powerful combination.

Available: Android & iOS | Free (hardware required) | myenergi.com

3. National Grid Carbon Intensity — Know when your export matters most

Best for: Environmentally minded Solar UK users who care about green impact

This one is different. It's not about your panels specifically — it's about the grid they feed into. The Carbon Intensity app (based on the official carbonintensity.org.uk API) shows you the carbon intensity of UK electricity in real time, broken down by region across England, Scotland, and Wales.

• See exactly when the grid is running dirty (gas and coal-heavy) versus clean (wind and solar-heavy)
• Decide the optimal time to export solar for maximum environmental value — your kWh matters most when the grid needs it most
• Regional data covers all UK areas — carbon intensity in Scotland differs significantly from the South East
• Open data, no account, completely transparent

For Solar UK homeowners who want to understand not just what their system earns them, but what it contributes environmentally, this is a uniquely honest tool.

Available: Android & iOS | Free | carbonintensity.org.uk

4. Hive — Smart home scheduling around your solar peaks

Best for: Solar UK homeowners with smart heating or appliances

Hive is one of the UK's most widely used smart home platforms, and it pairs naturally with solar generation — particularly when you know in advance when your panels are going to be working hard.

• Set heating schedules that align with midday solar peaks rather than expensive grid peak hours
• Smart plugs automate high-draw appliances to run during your solar generation window
• Compatible with a wide range of UK boilers and thermostatic radiator valves
• Geofencing and holiday modes prevent waste when the house is empty
• Strong UK support, available through British Gas and independently

Hive won't tell you when your panels are generating — that's what your solar forecast is for. But once you know the generation window, Hive gives you the tools to make sure your home is ready for it.

Available: Android & iOS | Free (hardware required) | hivehome.com

5. Sun Hours — The Solar UK forecast app built for British homeowners

Developer: AndyHQ, London | Platform: Android | Free — no account required

Here's the app that sits at the centre of the Solar UK stack — the one that tells you, in plain language, how much your panels will generate today and for the next 30 days. It comes up regularly on r/SolarUK whenever someone asks for a free, no-fuss solar forecast app — and for good reason.

Most solar apps overcomplicate setup. They ask for your panel azimuth, your inverter model, your performance ratio, your roof pitch in degrees. Sun Hours takes a different approach entirely.

What Sun Hours needs from you

Two things:

• Your UK postcode — so the forecast uses real local weather, not a regional average
• Your system's peak kWh output — the best single-day figure you've ever seen on your inverter

That's everything. No account. No sign-up. Your location never leaves your device.

From those two inputs, Sun Hours calculates your forecast using live cloud cover data — not historical averages. In the UK, where a historical average for April tells you almost nothing about whether today is actually going to be a good solar day, this distinction matters enormously.

What you get

• Today's expected kWh — before you've had your morning coffee ☕
• 7-day forecast with cloud cover and efficiency breakdown per day, so you can plan laundry, EV charging, or running the dishwasher around your best generation windows
• Hourly generation curve showing exactly when your panels peak — essential for timing high-draw appliances
• 30-day solar forecast based on historical sunlight data for your postcode area — useful for understanding your seasonal rhythm
• Push notifications — a morning briefing, plus a real-time alert when your best two-hour generation window opens
• Sol — the animated sun mascot who reflects the actual forecast, from barely-there on grey days to blazing on your best solar days ☀️

Privacy that's actually taken seriously

• ✅ No data collected
• ✅ No data shared with third parties
• ✅ Your location never leaves your device
• ✅ No account — ever

For Solar UK users who are tired of apps that treat them as a data point, this approach is rare and worth calling out.

Download Sun Hours — free on Android

⬇ Get Sun Hours on Google Play →

Built for the real Solar UK homeowner

Sun Hours isn't built for energy engineers or grid analysts. It's built for the person who installed panels 18 months ago, wants to know if they should run the washing machine this morning or wait until lunchtime, and doesn't want to log into a dashboard to find out.

The answer is there the moment you open the app.

The Solar UK app stack — putting it together

Used together, these five apps form a complete Solar UK toolkit — covering forecasting, energy management, EV charging, home automation, and environmental contribution. The natural starting point is the forecast. Once you know what your system is about to do, every other app becomes more useful.