Mae Mah is a 2,455 MW coal power station in Lampang, Thailand. It is operated by Electric Generating Authority of Thailand. Based on its capacity (estimated), it can supply roughly 3.1 million homes (estimated). It ranks #6 of 238 Thailand power plants by installed capacity. Commissioned in 1995, it is around 31 years old — long-established. In context, coal supplies about 17.8% of Thailand's electricity; the national grid averages 546 gCO₂/kWh (16.6% low-carbon) (2025).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000160.
Data status
Known data
Calculated from dataset
Not available
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
Data provenance
Source of the capacity and fuel values:
capacity: GEM · 2026 · L100000103576; fuel: WRI GPPD
In context: how this plant compares
At 2,455 MW, Mae Mah is well above the median coal plant in Thailand (660 MW). 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.
Key facts
- Share of Thailand coal capacity
- 14.1% of 17,394 MW across 18 plants in this dataset
- Age among peers
- 1 of 14 dated coal plants in Thailand is older
Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).
Capacity vs largest coal plants in Thailand
Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).
Owner
Operated by Electric Generating Authority of Thailand. All plants by this company →
Local climate & thermal context
This coal plant burns coal to raise high-pressure steam that spins a turbine-generator. It sits in a tropical savanna climate (Köppen Aw) — Northern Hemisphere, latitude 18.3°N — which shapes how much energy it can produce and how its output varies through the year.
Monthly mean temperature
This site has effectively no heating season (tropical/equatorial climate), so winter heat loss is not the driver here. The thermal concern shifts to year-round process heat and humidity/heat-driven corrosion of hot equipment.
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.
Site climate & environmental severity
This site sits in a moderately corrosive environment (estimated ISO 9223 class C3 — Medium), with humidity / wetness the leading environmental stress.
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.
How it compares & nearby plants
The #2 largest coal power plant of 18 in Thailand by capacity.
Thailand has 18 coal power plants in this dataset, together about 17,394 MW of capacity.
Nearby power plants
- Mae Moh power station · Coal · 3,880 MW · Lampang
- Lampang Solar Power Plant · Solar · 90 MW · Lampang
- Phrae Solar Power Plant · Solar · 1 MW · Phrae
- Had Siao · Solar · 9.7 MW · Sukhothai
- Sirikit · Hydro · 500 MW · Uttaradit
- Wang Man 1 Solar Power Plant · Solar · 10.2 MW · Tak
Location
Coordinates 18.2963, 99.7499 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Frequently asked questions
What type of power plant is Mae Mah?
Mae Mah is a 2,455 MW coal power plant in Lampang, Thailand, commissioned in 1995.
Who operates Mae Mah?
Mae Mah is operated by Electric Generating Authority of Thailand.