Energie21 GmbH Your partner for photovoltaic and decarbonisation projects Contact us About us Clean solutions for a A clean future. Offers in the field of photovoltaics We inspire you by supporting you competently and in partnership in the planning and realisation of optimal solar energy systems. Optimised planning and design Offer analysis and cost comparison Yield optimisation PV for municipalities and property portfolios incl. tenders Decarbonisation offer Our decarbonisation planning puts you on the path to net zero and makes you a leader in sustainability. Roadmap to decarbonisation Target agreement Free impulse consultation "renewable heating" Current projects Photovoltaik PV systems Bollpark South Photovoltaik PV system for parish hall Erdwärme Geothermal probe heat pump for detached house All news