Onshore Excursion Tour 4: Electricity Storage (ECO STOR / EPW in Bollingstedt) - SOLD OUT!
The battery storage facility in Bollingstedt is one of the largest in Germany. With a capacity of 103.5 MW and 238 MWh, it supports the expansion of renewable energy by storing excess electricity.
By actively participating in the markets for primary and secondary control reserves, as well as short-term markets (day-ahead auctions and intraday trading), the storage system helps to balance fluctuations in renewable energy production. Additionally, it has a price-dampening effect (reducing price peaks) in line with the merit order principle.
The storage system has been connected to the 110 kV grid since April 2025 and has been in operational service since May 2025.
The visit includes a walk through the facility with stations highlighting the inverters (32), battery storage containers (64), auxiliary power supply, and a view of the high-voltage switchgear. The construction process, functionality, and mode of operation will be explained on site. Location and further information can be found here: [Project Page Bollingstedt | ECO STOR]
🚌 Departure from fair: 8:00 AM
↩️ Return trip: approx. 9:50 AM
📍 Arrival at fair: approx. 10:30 AM
⏳ Duration of excursion: 60 minutes + travel
🚌 Date: 18 September 2025
👥 Limited capacity: limited per tour – secure your spot early!
Tours at a glance:
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Tour 1 (17.09.): Windtestfeld Nord – prototype testing in the Südermarsch
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Tour 2 (17.09.): Citizen-led H₂ energy projects – Ellhöft
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Tour 3 (18.09.): Hydrogen fueling in public transport – GP JOULE, Husum
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Tour 4 (18.09.): Large-scale battery storage – ECO STOR, Bollingstedt
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Tour 5 (19.09.): Corporate sustainability academy – Sustaineration, Husum
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Tour 6 (19.09.): Virtual power plants – Nordgröön, Medelby
Note: The onshore excursions are also open to the general public.
