QR codes systems for COVID-19.
Simple tools for bars, restaurants, offices, and other small proximity businesses.
You can have your own power plant in the backyard.
A better way of mounting solar panels. They will be mounted on the ground. The panels will be stack vertical for a space saving approach, and keep the cost low. Example of a 3KW system, the dimension are approximately 2' W x 4' L x 6' H.