These cables are essential if you have 2 Yamaha 2000is generators. Instead of one large generator I use 2 small generators to carry the lighter weight and secure the transporter in cold weather. Mainly used to keep the oven and electronics running 24/7. I can also do refueling, oil changes or if a generator goes out, you still have power. This cable connects 2 generators and I can turn on the AC when it's hot outside. I use 2 generators in all weather, in the field with ham radio emergencyβ¦