Mainz power station is a 1,123 MW coal power station in Rhineland-Palatinate, Germany. It is operated by Kraftwerke Mainz-Wiesbaden AG [100%]. Based on its capacity (estimated), it can supply roughly 1.4 million homes (estimated). It ranks #34 of 1,442 Germany power plants by installed capacity. Commissioned in 1956, it is around 70 years old — an older, legacy facility. In context, coal supplies about 20.6% of Germany's electricity; the national grid averages 330 gCO₂/kWh (59.1% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id GEM_coa_mainz_germa.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and/or fuel fields on this page include a source-backed provenance label from GEM, an official registry, Wikidata, OSM, or a cross-source match.
capacity: GEM · 2026 · L100000101972; fuel: GEM GCPT
At 1,123 MW, Mainz power station is well above the median coal plant in Germany (296.2 MW). Technically it is described as subcritical. Coal plants burn pulverised coal to raise high-pressure steam for a turbine; they run as baseload but are the most carbon-intensive mainstream source and the first targeted for retirement or efficiency retrofits.
Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Operated by Kraftwerke Mainz-Wiesbaden AG [100%].
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a temperate oceanic climate (Köppen Cfb) — Northern Hemisphere, latitude 50.0°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
Heating degree-days here run 19% above the median power plant in this dataset — a proxy for how much extra energy heated equipment must replace through its surfaces in winter.
Climate heat-demand index: 60/100 — this site sits in the mid third of the power plants we cover by heating degree-days.
Climate normals: WorldClim 2.1 (1970–2000 monthly normals, 10 arc-min, CC BY 4.0); zone: Köppen-Geiger world climate classification (Kottek et al. 2006, 0.5° grid). Degree-days & heat-demand index computed by PowerAtlas — a modelled heat-demand proxy, not a measured site figure.
For a plant’s outdoor hardware — heat-recovery steam generators (HRSG), expansion joints, valves, flanges and their insulation — the local climate sets how fast unprotected steel and coatings degrade. This site sits in a mild atmospheric environment (estimated ISO 9223 class C2 — Low), with humidity / wetness the leading environmental stress.
Higher environmental severity is exactly where protective removable insulation pays back most: a sheltered micro-climate slows corrosion, UV and thermal-cycling damage and extends outdoor hardware service life. This is an indicative site-climate context — not a condition assessment of any specific plant or operator.
Indicative estimate via the ISO 9223:2012 informative method (atmospheric corrosivity from temperature, time-of-wetness and airborne salinity), using WorldClim climate normals, the Köppen-Geiger class and coast distance. Indicative, not a measured corrosion rate.
The #16 largest coal power plant of 124 in Germany by capacity.
Germany has 124 coal power plants in this dataset, together about 64,920 MW of capacity.
Coordinates 50.025872, 8.24192 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Mainz power station is a 1,123 MW coal power plant in Rhineland-Palatinate, Germany, commissioned in 1956.
Its output is enough to supply roughly 1,405,354 homes (estimated).
Mainz power station is operated by Kraftwerke Mainz-Wiesbaden AG [100%].
