Electricity supplier grüüün stops supplying: Bundesnetzagentur opens supervisory proceedings

What the Bundesnetzagentur is examining at grüüün

On 20 October 2026 the Bundesnetzagentur opened supervisory proceedings against Münch Energie GmbH & Co. KG, which supplies households across Germany with green electricity under the brand „grüüün". In early October the company announced it would end its supply on 31 October 2026 — less than three months in advance. That is precisely what the regulator is examining: under the Energy Industry Act (EnWG) a supplier must give notice of ceasing its activity at least three months beforehand, and no such notice had reached the agency. It is also checking whether the customer information meets the EnWG's transparency requirements. According to the trade publication ZfK, around 200,000 customers are affected; the company blames energy policy, above all the planned EEG 2027. How a business electricity price is made up is explained in the guide to the commercial electricity price.

Who the supply stop hits

Affected are around 200,000 households, landlords and small businesses with a grüüün electricity contract. Anyone without a new contract by 31 October is not left in the dark: the local basic supplier takes over automatically — at first often as replacement supply, then as the regular basic-supply tariff after three months. So the power keeps flowing. But this fallback tariff is, in the view of the consumer advice centres, usually dearer than a freely chosen contract, and you become liable to pay there immediately, without lifting a finger.

Why a supply stop in November hurts especially

A supplier that cancels supply just before the heating season pushes the problem onto its customers — at the most expensive point in the year. „A supply stop in November is no small annoyance for households and businesses: anyone who does not switch in time lands in basic supply and pays the highest price in the middle of the heating season." — Pedram Dadgar, Strategic adviser to Green Contracting GmbH.

Legally the matter is not as simple as the announcement makes it sound: a running fixed-term contract does not end automatically just because a supplier declares it no longer wants to supply. From my work on energy supply contracts since 2021 I know how much depends on a clean wind-down — notification duties, deadlines, meter readings. Anyone affected should not treat the supply stop as settled, but check their rights and document any loss — the price difference to the old tariff up to the next ordinary cancellation date.

What to do now

1. Check the contract: review the term and the end date named in the letter; a fixed term does not end automatically through the announcement.
2. Take out a new tariff before 31 October and calculate it against the basic-supply price — the fallback tariff is rarely the cheapest.
3. Read the meter yourself at the end of supply and report it to the grid operator; you can leave replacement supply without notice and basic supply at two weeks' notice.