Since the first project with pond thermal storage in Ottrupgård, PlanEnergi has been a leading consultant in large seasonal thermal storage, including 75,000 m3 pond thermal storage in Marstal, 19,000 m3 borehole storage in Brædstrup, 60,000 m3 pond thermal storage in Dronninglund as well as the establishment of a pond thermal storage of 1.5 2.0 million m3 in Graz, Austria.

• Dam heat storage in Høje Taastrup (2023) – 70,000 m3 pond thermal storage that services the entire Copenhagen district heating system. 
• Brædstrup District Heating (Authority processing, tender, project and construction management)
  Dronninglund District Heating (Authority processing, project and construction management)
• Løgumkloster District heating (Design of overall system and economic calculations. Contracts for solar collectors and heat pump. Measurement program)
• Marstal Fjernvarme (Authority processing, tender, project and construction management)
• Status and recommendations for RD&D on energy storage technologies in a Danish context (2014). Edited by Alan Schrøder Pedersen, DTU and prepared for the Danish energy research programmes
• Investigation regarding heat storage technologies and large heat pumps for use in district heating systems (2013). Prepared for the Danish Energy Agency
• Monitoring Results from Large Scale Heat storages for District Heating in Denmark, prepared together with Solites, in connection with EnerSTOCK2018
• Design and Construction of Large Scale Heat Storages for District Heating in Denmark, prepared together with Solites, in connection with EnerSTOCK2018.