The big advantage to inverter/chargers is on installation. They are an inverter, charger, and automatic transfer switch in a single package. I am going to install my factory 100 amp converter on a separate 20 amp inlet so if needed I can either charge at 250 amps (not likely) or run double conversion - 15 amp circuit charging ~100 amps running the inverter to run the loads - at times exceeding the 15 amps coming in - like a electric heater or ac and the microwave / coffee pot / toaster / hair drier at the same time off a 15 amp cord. Useful at the inlaws house..