Product launch only. Unfortunately, it doesn't allow me to enter more than 3 hours of bulk loading (the trojan recommends four). I had to increase the voltage to compensate. It was not possible to force him to communicate with the computer. Ordered a wifi adapter which somehow works - you have to be very close to the adapter itself which is a bit weird as the supplied external controller allows you to control all the settings exactly the same. application ah. Again, the instructions are unclear: you need to turn off mobile data when using your phone in order for it to connect to Epever's WiFi and successfully obtain an IP address. I wish it had a built in internet connection for remote monitoring (saw it in an online video, looks like a chore).