Fronius Solar Inverter converts the DC current to the AC current which is what can be used in the home. The effectiveness of the inverter is important because it determines how long the system pays for itself and also stops a lot of energy from being wasted in form of heat. The bond from the manufacturer shouldn't pass you by. Twenty-five times bond period is the minimal time from a manufacturer who's estimable. To find out if the company is still in operation so that your bond isn't regarded as invalid.