Can you really have 15 to 20% I^2R losses at the connections without the connections melting down? That seems like a lot of heat energy in a small location. To have that much wasted heat, we'd have to have an excessive voltage drop in the circuit. If I have a 100 amp, 240 volt circuit and they are saving me 20% or 4800 watts, it looks like I'd have to have a 15.5 volt voltage drop in the circuit before they apply their "treatment".
Don