Solar Panel Mount Sizing Tool
This mount is intended for double-hung windows (similar to those shown in the picture above) with ¾” channels on both sides.
A double-hung window is a type of window where both the bottom and top window sections (called “sashes”) can be opened by moving them up or down. They typically have vertical channels on each side that the sashes slide up and down in. The channels in your window must be at least ¾” deep and ¾” wide.
This tool will help guide you through the process of determining if our window mounting system is appropriate for use in your window. There are many different types of double hung windows, so this tool is meant as a rough guide only. Email us at yo@energytransitiondesign.com if you have additional questions.
The solar panel width (the horizontal dimension whichever way you choose to orient it) cannot exceed the window opening width.
Measure the width or get the dimensions from the manufacturer.





Additional Requirements
- Your solar panel should always face towards the equator. In the northern hemisphere, this means that a southern orientation is best. In the southern hemisphere, a northern orientation is best. Easterly or westerly can also work.
- You must consider any obstructions, like trees or buildings, that may block sunlight. If there are obstructions that cast a shadow on your panel, it will under perform. It is very hard to estimate obstructions with the naked eye, so you should over estimate how much shade an obstruction will cause.
- You cannot install this product with a screen in the bottom section of your window, so you must be able to raise or remove it.
- If you're window is high up, above an area with heavy pedestrian traffic, or structurally weak; you will need to screw the mount into the sides of the window frame.
- The use of this product may restrict your ability to lock the window as you would normally. A window lock is included with this product, but it is not intended for security purposes or guaranteed to work with all windows. It is primarily intended to help keep the window securely in place for the weather barrier. If this is a concern, you may want to purchase additional window locks for security purposes.
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