The storage system’s special feature: charging can take place via the photovoltaic system’s electricity output as well as with electricity directly from the public grid. The withdrawal of energy from the public grid takes place at times with lower electricity purchase costs, usually at night.
The high level of flexibility of the volume of electricity purchased by the sewage treatment plant enables the plant to be operated with the maximum amount of stored electricity during those times with the highest electricity purchase costs (daily peak periods during the morning and evening). This is an aspect which has a positive effect when it comes to cost savings and efficiency. In total, a storage capacity of 20 kWh is available.
The project is accompanied by efficiency measures to reduce the sewage treatment plant’s energy needs. The generation and use of renewable electricity on a water management facility in Vietnam constitutes a novelty. With this, Tilia and SPWC are creating a flagship project in the area.