Inverters are perhaps the most important component in your renewable energy system. They are the device that converts you battery voltage (DC-direct current) into something you can use, specifically AC (alternating current). There are generally two types of inverters (1) modified sine-wave Inverter (more correctly square-wave inverter) and (2) pure or true sine-wave inverter. Cost-wise, modified sine-wave inverters are cheaper, however, they are only good for running motors such as well pumps and some house-hold appliances. To run most appliances and computers, for instance, a pure sine-wave inverter is needed. Attempting to run computer and computer-based appliances on a modified sine-wave inverters is not wise. Green Team Direct sells several different makes of inverters from leading manufacturers such as OutBack, Xantrex, and SMA (Sunny Boy). All inverters that we sell are pure sine-wave inverters.