Date Fri, Apr 03, 2009 07:45 AM For seven years, I have used a 300 watt inverter for various laptop computers running nav programs on the fly bridge. While most notebooks will boot and run with a 100 watt inverter, when they are running, they generally consume less than 100 watts (50 to 75 watts in my case). I would recommend the larger capacity inverter, which isn't necessarily a lot larger physically because of this reason - heat. The larger inverter will run with less heat and will be more efficient. I never blew a fuse on any 300 watt inverter, although I had a few shut-downs from overheating. Here in Florida, we had to keep the inverter out of direct sunlight to help it stay cool. YMMV. So buy an inverter with three times the watts needed for your 110 volt notebook running on a 12 volt inverter. Play it safe. Another tip here about your PC running on the fly bridge. Many notebooks have proprietary programs that let you turn on your computer's fan to keep it running continuously. If possible, you should locate this program and run your nav computer with it on all the time. Keep it cool. Martin Veiner ____________________________________________________________ Protect your home before it is too late. Click here for homeowner insurance information. http://thirdpartyoffers.juno.com/TGL2131/fc/BLSrjnsHGisSVsT22oOQ0UWMYBbZSuZOC 8TFfahH9l1jMoSOvL8PxQI8bNO/