Compare price and performance of the Top Brands to find the best 5 kW solar system with up to 30 year warranty. 10 per watt with the latest, most powerful solar panels, module optimizers, or micro-inverters. For home or business, save 26%. . A 5kW solar inverter is the heart of most residential solar systems, converting solar energy into usable electricity while ensuring efficiency and reliability. Why trust EnergySage? As subject matter experts, we provide only objective information. We design every article to provide you with deeply-researched, factual, useful information so that you can make. . The key is its upgraded transformer and dual output—110V and 220V—which cover almost any home or business need without worries. This inverter's multiple protections—short circuit, overload, over-voltage—are reassuring, especially when running sensitive appliances.