Germany's federal grid regulator BNetzA will not impose any compulsory coal-power plant closures in 2026, as sufficient volumes of capacity have exited the market on a voluntary basis to keep the country aligned with its coal phaseout targets. Nevertheless, the ongoing Iran conflict has reignited discussions over reactivating reserve coal units to cool power prices.

BNetzA noted voluntary plant retirements have pushed Germany's operational coal-fired capacity already beneath the statutory ceiling set for 2029. Prior to 2023, power plant operators could join state-run auction schemes to secure public compensation for early decommissioning under Germany's statutory coal exit framework, with a latest phaseout deadline of 2038.

Since 2023, BNetzA has held authority to order uncompensated forced shutdowns to enforce legal capacity caps. Mandated closure notices must be issued two and a half years ahead of implementation, with shutdown sequencing determined by plant age. The regulator stated 2026 marks the third consecutive year Germany complies with coal exit legal obligations without resorting to mandatory plant bans.

Critics argue the hard coal and lignite phaseout timeline remains too lenient. Even so, market dynamics could drive coal generation off the grid long before the legal deadline. EU Emissions Trading System (ETS) carbon costs paired with cheap renewable power render coal-fired generation economically unviable, according to utility EnBW.

A formal shutdown does not equate to permanent decommissioning. Transmission system operators identify facilities vital to supply security and place them into grid reserve, available for restart should market conditions demand it.

Experts warn energy market volatility triggered by the Israel-U.S. military strike against Iran could delay the market-led coal exit should oil and gas prices stay elevated. Chancellor Friedrich Merz has also flagged that coal plant retirements may need to be decelerated if war-linked energy shortages materialize.

Calls to pull certain coal units out of reserve to mitigate power price pressures first emerged at the onset of the conflict, and the debate has regained traction. Analysis from Montel Energy Brainpool estimates reactivation could lower 2027 day-ahead wholesale power prices by as much as 5%, yet lift power sector emissions by up to 10%.

A German economy ministry spokesperson said the government is reviewing possible reserve deployment. "That is not entirely straightforward for technical, economic and also EU legal reasons," the spokesperson commented. "We are continuing to examine whether a suitable mechanism can be devised." Any reserve unit activation would need to satisfy cost-efficiency criteria; the relevant assets are elderly and low-efficiency installations, the ministry added.

Germany's federal government failed to meet its mid-August deadline for releasing a comprehensive coal exit stocktake covering supply security, power price trends, greenhouse gas emissions and coal mining region impacts. The assessment will now be published in 2027, following tender outcomes for new gas-fired generating capacity. Authorities intend to integrate tender results to "carry out an analysis that is as realistic and robust as possible, particularly with regard to security of supply."