Aivita Group Inc., owns, operates, and distributes on-site energy systems in the United Kingdom and Europe. Its energy systems produces and supplies electricity, heat, hot water, and cooling solutions to commercial and industrial customers, such as healthcare facilities, hotels, multi-family hotels, multi-family residential buildings, leisure centers, industrial buildings, and schools and colleges. The company was formerly known as EuroSite Power Inc. and changed its name to Aivita Group Inc. in March 2025. The company was founded in 2010 and is headquartered in Waltham, Massachusetts.