That GoPower transfer switch is an RV solar style transfer switch. Be aware that all these transfer switches do fail and need to be installed in an enclosed location. A good policy is plan to replace the transfer switch every couple years as you service your generator for ultimate reliability. The relay contacts will burn up after repeated uses. These RV transfer switches were designed for safety rather than a power switch so that you could not have 2 power sources working at the same time doubling incoming power.