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I used a 6/3 130' cord and was only able to pull 11 amps out of it before voltage drooped into the DO NOT USE A/C range. So I connected a multi-tap 2Kw transformer at both ends and blew out a 20-amp receptacle. This was back in the 70's. Long distances are murder on volt drop. Remember a 150' is really 300' forth and back. I recommend studying some tables - worst case loading, then figure out if arriving voltage exceeds the boost percentage capacity of your new gizmo. And be kind to the sending receptacle. I figured out it was wired with 10-gauge so on went a 30-amp twist lock. Gizmos are like solar panels they grow legs with running shoes. It goes on the load end of the circuit - your rig.