His solar array's Wi-Fi access point was being created by a small device called a management unit.
“Anyone within Wi-Fi range could connect to that device and potentially jump onto my home network, which is absolutely scary," Bret-Mounet told Forbes.
After that, he found more problems. He discovered the default username and password between his management unit and a remote server to which it was connecting were "admin" and "support," respectively. A brute force password attack was enough to uncover these and control the maximum tolerances and limits of each panel. Soon after, he discovered a way to control the panels of other homes through the same connection.
The maker of the device, Tigo Energy, responded to the hack by saying it was a mistake that only affected 1,000 homes, but the incident served as a warning and sign of things to come in the growing network known as the Internet of Things.
