Identify device types

Zaptec has four lines of products:

1. Zaptec Pro for system charging.
2. Zaptec Go for home charging.
3. Zaptec Go 2 for home charging.
4. Zaptec Sense for load balancing.

All these devices have a 9-character serial number, and the first 3 characters (the prefix) can be used to distinguish them.