Hi I just bought a new (in box) HPWC from a former Tesla owner. The price was right. However I realized it's not the updated one, but the older one. What are the differences? FYI I will only be charging one model S @48A, using a 60A breaker. I wanted the HPWC because I'll be using the mobile connector somewhere else and I don't want to plug/unplug every day. Thanks for helping.