NGEN Deploys 7.7 MW Grid-Scale Battery Storage in Niklasdorf

NGEN built the Niklasdorf facility on an industrial site in the Mur valley, in the Leoben district of Styria. It pairs 7.7 MW of power with 15.4 MWh of capacity: four Tesla Megapack 2XL units in the two-hour configuration, with integrated cooling and controls.

Niklasdorf is NGEN's third battery in Austria, after Arnoldstein in Carinthia in 2023 and Fürstenfeld in Styria in 2025. The three are dispatched as one portfolio from the same platform that runs the rest of NGEN's European fleet.

As wind and solar grow, Austria's power system leans harder on assets that can absorb a surplus and release it again at short notice. A 2025 study by Austrian Power Grid, PV Austria, TU Graz and d-fine put the country's total battery requirement at 8.7 GW by 2040, against 1.1 GW installed at the time of the study. Large-scale storage accounts for 2.7 GW of that figure, and only about 0.1 GW of it exists today.

Styria carries roughly 17 percent of the national requirement, third behind Lower and Upper Austria. Niklasdorf is built into that gap.

Capacity does not reach the balancing markets simply by existing. It has to be prequalified with Austrian Power Grid, the transmission system operator, before a single megawatt can be offered. Prequalification is the entry ticket rather than the job. Once an asset is active, bids have to be placed, positions managed and energy delivered on call, in every hour of every day. That work is continuous, and it belongs to software.

Niklasdorf is a standalone battery, not a plant-attached one. The four Megapack units set the physical envelope: 7.7 MW of output, held for two hours. Everything above that envelope is a decision: when to charge, when to discharge, which market to serve in a given period. Those decisions are made by NGEN's platform.

The platform tracks grid conditions and market signals continuously and positions the asset accordingly. It charges through surplus periods and discharges into demand peaks, managing state of charge so the battery is available when a call arrives rather than empty at the wrong moment.

The asset is supervised around the clock from NGEN's dispatch centre in Žirovnica, Slovenia, which runs the company's European fleet as one coordinated system. For the site and for the grid operator, that means a single operating regime and a single point of contact.

Market-ready flexibility

Prequalified capacity in Austria's balancing energy markets, available from the first day of operation.

Two hours at full output

15.4 MWh able to hold 7.7 MW for two hours, connected in the Styrian industrial belt where demand is concentrated.

Support when the system is tight

Surplus absorbed during low-price hours, energy released into peaks, with the site supervised continuously from Žirovnica.

A third Austrian asset

Niklasdorf, Arnoldstein and Fürstenfeld are traded and dispatched as a single Austrian portfolio.