On 21st June the demonstrator partners visited Bornholm to celebrate the start of the demonstration activities of INSULAE project.
DTU together with the Danish partners, Fremsyn ApS, Bornholms Energi & Forsyning and Bornholms Regionskommune, viewed fast charging sessions powered by locally generated solar energy. The key element is inside the white container in the photo: a 312 kWh reconfigurable battery storage system equipped with two 175 kW electric vehicle ultra-fast chargers (up to 350 kW in single-mode) and a 43 kW grid connection.
The storage system, currently among the largest in Denmark and in Europe, is of a unique type, being formed by individual Lithium iron phosphate (LFP) cells that can be connected in different fashions to modify the overall storage topology. This particular feature makes it very attractive because it removes the need for intermediate energy conversion stages, needed for example to follow the variable voltage of a vehicle being charged. Moreover, it makes it possible to be directly coupled to the local #photovoltaic system of 61 kW installed at the school hosting the demo (Campus Bornholm) and harvest the solar production to fulfill the fast charging needs.