Lahendong IV is a 80 MW geothermal power plant in North Sulawesi, Indonesia. It is operated by PLN + Pertamina Geothermal Energy. Based on its capacity (estimated), it can supply roughly 150k homes (estimated). It ranks #289 of 401 Indonesia power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, geothermal supplies about 4.5% of Indonesia's electricity; the national grid averages 680 gCO₂/kWh (18.1% low-carbon) (2024).
Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1000778.
Known, modelled and calculated values are kept separate. Missing fields are shown as unavailable.
The capacity and fuel fields on this page are source-record values from the upstream open dataset. They are useful for identification and ranking, but they have not been upgraded to a 2026 registry/GEM-location verified value.
capacity: WRI Global Power Plant Database source-record (legacy); fuel: WRI source-record fuel
At 80 MW, Lahendong IV is below the median geothermal plant in Indonesia (110 MW). Geothermal plants tap underground heat to raise steam for a turbine; they provide steady, low-carbon baseload but are limited to geologically active regions.
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 PLN + Pertamina Geothermal Energy.
This geothermal plant taps underground heat to raise steam that drives a turbine. It sits in a tropical rainforest climate (Köppen Af) — Northern Hemisphere, latitude 1.3°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.
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 an aggressive, high-corrosion environment (estimated ISO 9223 class C5 — Very high), with marine salt corrosion 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 #6 largest geothermal power plant of 10 in Indonesia by capacity.
Indonesia has 10 geothermal power plants in this dataset, together about 1,342 MW of capacity.
Coordinates 1.2542, 124.8225 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.
Lahendong IV is a 80 MW source-record geothermal power plant in North Sulawesi, Indonesia.
Its output is enough to supply roughly 150,171 homes (estimated).
Lahendong IV is operated by PLN + Pertamina Geothermal Energy.
