MVA Energy is developing utility-scale battery storage systems.

A BESS project is built using LFP batteries (lithium iron phosphate), which are considered a particularly safe solution for energy storage. Compared to the previous generation of NMC (Nickel-manganese-cobalt) cells, which are mainly used in cars, bikes, and various consumer electronics, LFP batteries require a much higher temperature to catch fire, significantly reducing the risk of fire. They are also more stable in the event of damage or short circuits, which lowers the chance of a thermal chain reaction. Since they do not release oxygen when overheated, the likelihood of fire spreading is also reduced. Moreover, LFP batteries contain no cobalt, which makes them chemically more stable and less reactive, and it also avoids issues related to sourcing cobalt from problematic countries with poor labour and safety standards. Their longer lifespan also reduces the risk of defects and technical failures.

Yes, like many industrial installations, BESS sites do produce noise. This noise primarily comes from two sources: the high-voltage transformer, which can emit a slight humming sound, and the fans in the battery containers, which are needed to cool the equipment. The inverters also generate some noise, albeit to a lesser extent. It is important that the overall noise level of the battery farm remains well within legal noise limits. The installations are designed and installed to minimize the noise impact on the surrounding area. In practice, a BESS site only adds a barely noticeable amount to the existing ambient noise.

Yes, several possible mitigation measures are considered to limit any potential noise disturbance. Depending on the project, one or more of the following options may be applied:

• A noise barrier can be installed around the BESS site to reduce sound transmission.
• The battery units with fans can be placed in enclosed cabinets.
• The inverters can be equipped with sound-damping kits.
• The installation is always designed to comply with the strictest standards of environmental legislation, ensuring there is no disturbance for nearby residents.

No, MVA Energy BESS projects comply with environmental regulations that cover all frequency ranges, ensuring no nuisance from tonal variations.

The transformer is cooled with mineral oils. Should a problem unexpectedly occur, the oil is safely collected in a containment basin so it can be removed without any danger. These containment systems are oversized, ensuring that even in an exceptional incident—such as a complete leakage of transformer oil—they can fully contain the spill and prevent any environmental contamination.

No, the only new high-voltage cable is the underground connection between the battery park and the Elia substation. Upon arrival at the BESS site, the voltage is immediately reduced to a much lower level. The BESS site itself does not produce additional radiation. It complies with all applicable standards for electromagnetic radiation and operates at low voltage, resulting in no measurable radiation emissions.