Other manufacturers, many of which are new to manufacturing solar, are trying to catch up to SunPower’s 30+ years of dedicated solar experience, and to the exceptional terms of our Complete Confidence warranty. Many of them include hidden charges, such as shipping and labor costs, and don’t cover all of the many parts that go into a working solar system – panels, inverters, racking system, monitoring hardware and software. SunPower is the only company who offers one comprehensive product, power, and labor warranty for all components, because we engineered and designed the entire system.