The Heart 2500 Freedom Inverter has a set of contacts in it that allow it to bypass if shore or generator are being used.Liberty's electrical system does not load share,therefore if there is an inverter fails, every circuit will work on gen. or shore power.I had a inverter failure in November and it was a minor inconvenience,I had to start the gen. to have water.Other designs that load share will not bypass the inverter and those circuits will not have current. In those electrical designs it would be important to have a bypass as Jon has described in other threads.