SolarWorld’s foundation is built on more than 40 years of ongoing innovation, continuous optimization and technology expertise. SolarWorld’s Sunmodule¬Æ solar panels are designed and manufactured to the highest standard and quality to ensure performance and durability. SolarWorld leads the industry in solar technology advancements. Continually pushing the limits to attract, capture and harness every ray of sunlight, then convert this sunlight into sustainable, usable energy. SolarWorld B-grade modules are classified as modules with small cosmetic defects such as scratches in the frame or glass up to 5mm in length. The B-grade modules carry the same workmanship and production guarantees as standard modules.