Generac Power Systems, Inc. manufactures a complete line of emergency automatic standby generators for home or business that can be installed during new construction or retrofitted into existing structures. Residential emergency home standby generators are permanently installed outside (similar to an air-conditioning unit), supply electrical power to all pre-selected lights and appliances,or can be connected to a whole house transfer switch and power all circuits.They are powered by either natural gas or LPG. Models range from 7,000 to 40,000 watts. They work with a matched automatic transfer switch that responds within seconds when utility power shuts down, even when no one is home!These are our most popular models.They come with a 2 year factory warranty.We will be happy to do a turn key installation for you or work with you or your installer if you choose to do the installation yourself.Typically 7000 to 16000 watts are enough to power a normal house.If you just want to power emergency circuits (furnace,well pump,refrigerator,and a few lights a television or a computer)7000 watts should be enough.Typical costs range from $4000 to $7000 installed.Don't hesitste to call us for a free no obligation site evaluation and estimate