Sunplan vs Solar

Sunplan predicts how much energy your solar installation will produce — hour by hour, seven days ahead. This is not a weather app with a chart bolted on. Sunplan calculates output from a physical model: the sun's position for your exact coordinates, your roof geometry, and how forecast cloud cover attenuates solar radiation. HOW IT WORKS You enter your installation parameters: capacity, azimuth, tilt angle and location. Sunplan computes clear-sky irradiance, then corrects it for forecast cloud cover from Apple WeatherKit. The result is predicted production in kWh, for every hour and as a daily total. WHAT YOU GET - 3-day production forecast - Hourly breakdown with the daily production peak - Daily totals in kWh - Day-to-day comparison - Multiple installations, if you have more than one array WHO IT'S FOR For anyone running rooftop solar who wants to plan self-consumption. Know in advance which day is worth running the dishwasher, the washing machine or the EV charger — and when to charge your home battery from the grid instead. PRIVACY Sunplan has no server. Every calculation runs on your iPhone. No account, no email, no sign-in. Your installation parameters stay on the device. I collect nothing. No ads, no tracking. ABOUT ACCURACY A production forecast is only as good as the cloud forecast behind it. Next-day predictions are usually close. The further out the day, the wider the uncertainty — especially under broken cloud, when output swings minute to minute. Sunplan shows a prediction, not a promise. Treat it as a planning tool. WHAT SUNPLAN DOESN'T DO It doesn't connect to your inverter or read actual production. It doesn't control anything in your home. Nothing to install beyond the app. I built Sunplan because I run solar at home and wanted to know what to expect. I'm still developing it — if something's missing, write to me.

Solar-Check provides comprehensive information about solar radiation and the expected output of your photovoltaic system at any selected location. Choose the location of your PV system and enter the system size, orientation, roof pitch and system losses. Solar-Check uses these values to calculate the expected PV output and presents important solar and weather data in a clear overview. Features: • Historical solar radiation for the selected location • PV output calculation for your solar system • Consideration of system size, orientation, roof pitch and system losses • Comparison with previous periods • 7-day solar radiation forecast • Expected PV output for the next 7 days • Daily direct and diffuse solar radiation • Sunshine duration, cloud cover, temperature and precipitation • Hourly solar radiation details • Hourly expected PV output • Location selection by search or map Solar-Check helps you understand the solar conditions at your location and estimate the potential output of your photovoltaic system. Actual energy production may vary depending on weather conditions, system performance, shading and other local factors.