Solar Energy Forecast

MaxSaur

About this app

Solar Energy Forecast is a smart and easy-to-use app for anyone who owns solar panels or plans to install a solar power system. Get a clear solar forecast for today and the next days, understand how weather affects solar production, and estimate daily solar energy potential in your area.

Unlike regular weather apps, Solar Energy Forecast focuses on data that matters for solar panel generation, solar radiation, and sunny conditions.

☀️ Key features

• Daily solar energy forecast
• Simple day rating: Good / Average / Weak
• Hourly charts for GHI, DIF, DNI, UV index, and cloud cover
• Compare actual solar resource with the potential of a clear sky day
• Sun position: solar elevation and azimuth
• Sunrise and sunset times
• Weather risks for solar panels: wind, snow, hail, ice, thunderstorm
• Search locations by city, map, or GPS geolocation
• Save favorite locations for quick access

📈 Understand solar conditions better

The app helps you see how productive the day may be for your solar station, rooftop panels, home solar system, or off-grid setup. Quickly compare upcoming days and choose the best time for energy-intensive tasks.

⚡ Useful for

• Homeowners with solar panels
• Solar power system owners
• People planning solar installation
• Off-grid users
• Anyone interested in solar weather forecast and sunny conditions

📌 Important note

The kWh/m² value shows solar energy received by 1 m² of horizontal surface during the day. It is not the exact output of your solar panels. Real production depends on panel size, efficiency, tilt angle, direction, temperature, shading, and system losses.

📘 What do GHI, DNI, and DIF mean?

GHI — Global Horizontal Irradiance. It is the total amount of solar energy received by a horizontal surface: direct sunlight plus diffuse light from the sky.

DNI — Direct Normal Irradiance. It is solar energy coming directly from the sun to a surface pointed perpendicular to the sun’s rays.

DIF — Diffuse Irradiance. It is the part of sunlight scattered by clouds, the atmosphere, and particles in the air. It is especially important in cloudy or overcast weather.

🌍 Plan smarter with Solar Energy Forecast

Track solar activity, cloud cover, and expected generation with one simple app.

Ratings and reviews

absolutely brilliant app, perfect for what I need and tells me the week ahead of what I might expect from my solar array. just one thing I would love to see is if I could have an hourly chart or drag my finger across to see what that hour might give you, apart from that I think it's brilliant and I use it every day. I would definitely pay for this app and so glad there aren't any of them annoying ads. 5 stars all day long.

Following an issue with the app the developer responded very quickly to fix it. It's a great app combining weather forecast data with angular calculations and it allows you to make minor adjustments to find the sweet spot - where PV generation starts to match the forecast closely. Like it. Further edit, the app is great but the weather data (presumably from an API source) isn't as accurate as I'd hoped.

It would be good if you could look at historical data so that you could adjust the settings to reflect your set up especially on clear sunny days. Forecasting during cloudy days is always going to be more difficult and less accurate but even then historical data would allow for better set up.

What’s new

Added a new “Forecast and history” screen: you can now view solar potential, cloud cover, radiation, and station generation across an extended range of past and future days.
For today, the home screen now shows how much energy the station may still generate before the end of the day, together with the forecast for the whole day.