I'm going to be taking a road trip that will require me to use some RV parks for charging. I'm considering purchasing a second portable EVSE to hedge against being stranded due to an EVSE failure (in some cases the nearest public EVSE might be 50+ miles away.) The obvious choice is Tesla's UMC. It's ~$700 w/shipping and tax. If I'm going to buy a second EVSE, I thought I might as well buy one with a J1772 connector since I own a Volt, and I already own a UMC. The only down side is it won't have the button to open the charge port. I can live with that given that I likely won't be using this device unless the UMC fails. I'm surprised to find that there does not appear to be another manufacturer that makes a portable EVSE that supports 40A (10kW) charging! Clipper creek has a new device that comes with a 14-50 plug, and calls for a 50A breaker. For whatever reason it is still limited to 30A charging. Anyone aware of a portable EVSE w/J1772 that supports 240V/40A? I'm aware that it is possible to cut off the end of the UMC and put on a J1772 but at the moment I'm not interested in doing that. Thanks.