How to choose a solar forecast app.

Your array inputs

Look for panel wattage, tilt, and direction. A generic solar number cannot represent every setup.

Enough days to plan

Choose a forecast window that matches how far ahead you need to plan energy use.

Learning from logged production

If the app adjusts to your setup, check when that learning starts and how one unusual reading is handled.

Visible uncertainty

A planning range is more honest than one number presented as a guarantee.

Price before purchase

You should be able to see the subscription terms and any trial limits before you commit.

SunPlanner uses your panel wattage, tilt, direction, location, and weather data. It shows today and up to 16 days with a planning range. If a refresh cannot finish, the last saved forecast may remain visible with its age.

After three usable production readings, SunPlanner can begin calibrating future estimates to your setup. The Android app is $5 per month or $50 per year, and a seven-day Google Play trial may be available to eligible new subscribers.