The majority of our business with Onan is for Off-Grid generator installations and RV generator parts, sales and service. Onan's commercial mobile generators are a reliable solution for off-grid power when using an air cooled generator. When using an Onan for off the grid use you will still have a full manufacturer warranty. Most manufacturer's void their warranty when a generator is used in an off-grid installation. Onan generators will also run at a lower RPM allowing it to run quieter and longer. The only disadvantage with using an Onan generator is that they need to be insalled in a shed, on a stand, with proper ventilation. Shed installations are not always cost effective or feasible for all customers. For a stand alone system that can remain outdoors, we would recommend a Kohler 8.5RES or a Generac EcoGen. These are both reliable alternatives.