OPL5 15 Amp to 50 Amp RV Power Adapter, 5-15P Male to 14-50R Female Adapter Power Cord Cable 10 Gauge Heavy Duty Electrical Converter with Grip Handle, 125V 1875W-12 inches (15A Male to 50A Female)

Very good product

Perfect for plugging RV into the house to charge the battery, run the refrigerator, or run one air conditioner. (Notice I used the word or in that sentence!) I use mine with a Progressive Industries EMS to cut power in case the voltage drops too low. Also, its best to test your outlets to see which one has the highest voltage--use that one! Mine range from 118v to 122v.