☀️ Solar Site Check

Allow location and motion when asked. Your location stays on this phone.

Saved sites

No sites yet.

How it works

Set up: enter the panel, battery and what you need.
Survey: stand where the panel will go, with the phone at panel height. Turn slowly as prompted, and the app takes photos of the skyline.
Skyline: check the line where the sky meets buildings, trees and hills, and fix it with your finger.
Result: the best direction and tilt, energy for each month, and an off-grid pass or fail.

Estimates are typically within ±20–25% of a normal year. Use them for choosing and screening sites, not as a guarantee. This is not a structural or electrical survey.

Site set-up

Site name

Goal

Months the system is used

Panels

Watts per panel Number of panels Panel size (m) Height above ground (m)

Battery & load

Battery (Ah) Battery voltage Battery type Charge controller

Daily use (Wh per day)

For example, 10 W running all day = 240 Wh. For a monitor, use its average power × 24.

Limits (optional)

The direction is fixed (roof, wall or pole)

Min tilt (°) Max tilt (°)

Compare with an existing panel

Location

Waiting for GPS…

Enter by hand

Latitude Longitude

Advanced

Performance ratio Ground reflectance

The performance ratio covers wiring, heat, dirt and inverter losses. Off-grid systems also allow for the controller (PWM about −20%) and the battery automatically.

Starting camera…

Check the skyline

The red line should follow the top of buildings, trees and hills. Tap Edit, then draw along the true skyline with your finger.

Skyline 21 Jun Mar/Sep 21 Dec Other months

Result

Calculating…

Report

Compass & sun

Camera points (true north)

–

Laid flat on a panel: faces

–

Panel tilt

–

Sun direction

–

Sun height

–

Sunrise / set

–

Point the camera at the sun (don't look at it). The camera and sun directions should agree.

21 JunEquinox21 DecTodayCamera

Latitude

–

Longitude

–

Magnetic var.

–

Sensor details