Wattsun Solar is a free app available for anyone to download and is used for those that want to communicate with Wattsun Solar. It is as simple as downloading the App and register as a user. Once registered, you can begin communicating right away. We will reach out to you via push notifications and in-app messaging to improve your overall buying experience. Once you purchase your new Product from Wattsun Solar, feel free to write a review. We appreciate your business.