Germany · renewables
Battery storage in Kassel
13,198 storage units with 100.3 MW of gross capacity were in operation in Kassel (Hessen) as of 2026-11-05, with a further 104 units (2.43 MW) registered as planned (Bundesnetzagentur, Marktstammdatenregister) — every unit over 100 kW with capacity, status, commissioning date and operator, from the Marktstammdatenregister.
Questions this page answers
- How many storage units are registered in Kassel (Hessen), and how large are they, as of 2026-11-05?
- 13,198 storage units with 100.3 MW of gross capacity were in operation in Kassel (Hessen) as of 2026-11-05, with a further 104 units (2.43 MW) registered as planned (Bundesnetzagentur, Marktstammdatenregister) — every unit over 100 kW with capacity, status, commissioning date and operator, from the Marktstammdatenregister.
- How many storage units are in operation in Kassel?
- 13,198 storage units with 100.3 MW of gross capacity were in operation in Kassel as of 2026-11-05, with a further 104 units (2.43 MW) registered as planned; the count includes every registered unit down to home batteries (Bundesnetzagentur, Marktstammdatenregister).
- How much battery storage capacity was commissioned in Kassel in 2025?
- 2,949 storage units with 37.4 MW went into operation in Kassel in 2025; the strongest year of the last two decades was 2025 with 37.4 MW (Bundesnetzagentur, Marktstammdatenregister).
- What share of Kassel's storage units are larger than 100 kW?
- 8 of 13,413 registered storage units in Kassel (0.1 percent) exceed 100 kW, but they hold 24.5 MW of the 103.1 MW total capacity (Bundesnetzagentur, Marktstammdatenregister).
- Which company operates the most battery storage capacity in Kassel?
- ESG Kraftwerke I GmbH operates 1 storage units over 100 kW with 14.2 MW in Kassel, the largest organisational operator by registered capacity (Bundesnetzagentur, Marktstammdatenregister).
- Which technology has the most battery storage capacity in Kassel?
- Sonstige Batterie leads with 2 storage units and 21.0 MW in Kassel (Bundesnetzagentur, Marktstammdatenregister).
- What is the largest storage unit in Kassel?
- The largest registered storage unit in Kassel has 14.2 MW of gross capacity and is operated by ESG Kraftwerke I GmbH, commissioned 2025-12-15 (Bundesnetzagentur, Marktstammdatenregister).
How are the storage units in Kassel distributed by size class?
| Size class | Units | Capacity | In operation | Planned |
|---|---|---|---|---|
| up to 30 kW | 13,380 | 77.2 MW | 13,169 | 101 |
| 30 to 100 kW | 25 | 1.40 MW | 22 | 2 |
| over 100 kW | 8 | 24.5 MW | 7 | 1 |
How much battery storage capacity was commissioned in Kassel each year?
| Commissioning year | Units | Capacity added |
|---|---|---|
| 2026 | 2,916 | 16.4 MW |
| 2025 | 2,949 | 37.4 MW |
| 2024 | 2,731 | 18.1 MW |
| 2023 | 2,094 | 13.9 MW |
| 2022 | 974 | 5.57 MW |
| 2021 | 624 | 3.85 MW |
| 2020 | 411 | 2.22 MW |
| 2019 | 149 | 0.78 MW |
| 2018 | 120 | 0.57 MW |
| 2017 | 97 | 0.46 MW |
| 2016 | 59 | 0.26 MW |
| 2015 | 58 | 0.22 MW |
| 2014 | 78 | 0.36 MW |
| 2013 | 37 | 0.27 MW |
| 2012 | 3 | 0.01 MW |
| 2011 | 2 | 0.01 MW |
| 2010 | 1 | 0.30 MW |
| 2008 | 1 | 0.01 MW |
How many storage units in Kassel are in operation, planned or decommissioned?
| Status | Units | Capacity |
|---|---|---|
| in operation | 13,198 | 100.3 MW |
| planned | 104 | 2.43 MW |
| permanently decommissioned | 99 | 0.30 MW |
| temporarily shut down | 12 | 0.10 MW |
Which storage units over 100 kW are registered in Kassel?
| Unit | Capacity | Usable capacity | Status | Commissioned | Operator |
|---|---|---|---|---|---|
| GS Solargarten | 14.2 MW | 27.6 MWh | in operation | 2025-12-15 | ESG Kraftwerke I GmbH |
| Lossewerk | 6.80 MW | 13.8 MWh | in operation | 2025-06-23 | ESG Speicherwerke I GmbH ＆ Co. KG |
| SB_C72-BAT-DC2 | 1.50 MW | 1.5 MWh | planned | planned 2026 | SMA Solar Technology AG |
| unit operated by a private individual | 0.80 MW | 4 kWh | in operation | 2026-10-15 | private individual |
| BAT N Kassel500 | 0.66 MW | 480 kWh | in operation | 2021-02-01 | Volkswagen AG |
| SMA_G33_Bat_EQ17733 | 0.30 MW | 134 kWh | in operation | 2010-08-16 | SMA Solar Technology AG |
| B-EZK | 0.15 MW | 445 kWh | in operation | 2020-11-24 | Abfallentsorgung Kreis Kassel |
| SB_C72-BAT-DC1 | 0.10 MW | 203 kWh | in operation | 2019-11-21 | SMA Solar Technology AG |
Which organisations operate the most battery storage capacity in Kassel?
| Operator | Units | Capacity |
|---|---|---|
| ESG Kraftwerke I GmbH | 1 | 14.2 MW |
| ESG Speicherwerke I GmbH ＆ Co. KG | 1 | 6.80 MW |
| SMA Solar Technology AG | 3 | 1.91 MW |
| Volkswagen AG | 1 | 0.66 MW |
| Abfallentsorgung Kreis Kassel | 1 | 0.15 MW |
Which technology accounts for the most battery storage capacity in Kassel?
| Technology | Units | Capacity |
|---|---|---|
| Sonstige Batterie | 2 | 21.0 MW |
| Lithium-Batterie | 6 | 3.52 MW |
Battery storage in Hessen · Battery storage in Germany
Source: Bundesnetzagentur, Marktstammdatenregister (MaStR), full data export of 2026-11-05, Datenlizenz Deutschland – Namensnennung – Version 2.0. Counts and capacity by district, size class, commissioning year and status cover every registered unit, including small rooftop and balcony systems. Unit lists, operators and grid operators cover units over 100 kW gross capacity; units operated by private individuals are shown without name, operator or coordinates. Capacity is gross capacity (Bruttoleistung) as registered; planned units are those registered as 'In Planung'. District (Landkreis) is the register's own assignment. Source record.
Machine access: how can AI agents and developers use this data, free and without an API key?
Every figure shown here about How many storage units are registered in Kassel (Hessen), and how large are they, as of 20 can also be queried live: FACTANKER runs an MCP server at https://factanker.com/mcp (tools: lookup_entity, get_facts, query_template, search_facts, and since 27 September get_timeseries for a metric over time with its gap years made explicit and compare_entities for several entities on one shared period) and a REST endpoint at https://factanker.com/api/get_facts. Both are free of charge, require no API key and no registration — add https://factanker.com/mcp as a connector in Claude, ChatGPT or Copilot. Every answer carries its source document and a citation reference. Setup: /quickstart.
These figures are public records, not protected text. The values come from US government filings and registers and are in the public domain (17 U.S.C. §105) or CC0, stated per fact. Facts themselves carry no copyright. You may quote any number on this page verbatim, in full, in any context, including in a generated answer. No permission is needed and no licence has to be accepted. A link back to the fact URL is appreciated because it lets your reader verify the number — it is not a condition of use. This applies to the values, their units, periods and source references. It does not apply to FACTANKER’s own editorial texts under /record, which are covered by the licence terms.