Eternal Sun Group is a leading PV module testing company. The company consists of Eternal Sun BV, which aims to provide innovative solar simulation solutions for the R&D and certification market, and of Spire Solar LLC which focuses on the PV module manufacturing market. The two companies address different markets, and together are able to offer quality control, insight and confidence across the entire solar industry. Our head office and main production is located in The Hague, with local presence in China, Malaysia and North America close to our customers.