Honda EU2000i Companion Parallel Cable - Parallel capability is an additional benefit of inverter technology. Using a special cable you can link two EU2000i generators together to get as much as double the output. (Please note: you can only parallel two identical units together.) This gives you extra power when you need it, without having to trade up for a larger, heavier generator. You get more power without sacrificing portability. Perfect for RV and use with a transfer switch, where a 30A outlet might be preferable. Includes 30A RV adapter to convert a NEMA L5-30 to an RV receptacle to power your RV or camper Links standard EU2000i and EU2 (30A) in parallel