On one of these threads someone mentioned just buying a 50 amp ems so it could be moved to a 50 amp rig in the future. That may work but I would have to guess that you would be looking at a continuous error code if it worked at all. You would have to also contact PD about this but my guess is that it wont work because its going to see a missing hot and that's what it's supposed to do. Again, I may be wrong so check into it if you like. The easy answer is to just do a hard wire 30 with pendant. If you want to have a better power supply get the 30/50 adapter. You can resell it down the road or use it as a selling point to a prospective buyer.