Rex at Roby Hotshot Transportation, Inc was having problems with his laptop running in his truck. He had some cheap-o power inverters that were modified sine. These modified sine wave inverters were causing his laptop to go haywire. He called our power inverter store and I advised that he need to go true sine wave on his power inverter. Check out our Power Inverter guide for more information. But seeing as his business relied on his ability to communicate when necessary, it was important for his laptop to be reliable on the road.