Andekaleka — Madagascar

Andekaleka is a 58 MW hydro power plant in Alaotra Mangoro, Madagascar. Based on its capacity (estimated), it can supply roughly 58k homes (estimated). It ranks #5 of 16 Madagascar power plants by installed capacity. Commissioned in 1982, it is around 44 years old — long-established. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, hydro supplies about 37.0% of Madagascar's electricity; the national grid averages 432 gCO₂/kWh (42.4% low-carbon) (2024).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1023093.

Capacity provenance

The public capacity above is the current source-record value. A 2026 tracker candidate lists 91 MW for Andekaleka hydroelectric plant, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).

Data provenance

Capacity and fuel are the upstream open-dataset record, not yet matched to a 2026 registry or GEM entry.

capacity: WRI GPPD; fuel: WRI GPPD

In context: how this plant compares

At 58 MW, Andekaleka is well above the median hydro plant in Madagascar (16.5 MW). Technically it is described as run-of-river. Hydropower converts the energy of falling or flowing water into electricity; output depends on rainfall and reservoir level, and large dams also provide grid balancing and storage.

Capacity comparison computed from the WRI Global Power Plant Database; fuel-type context is general engineering background.

Key facts

Share of Madagascar hydro capacity

51.5% of 113 MW across 5 plants in this dataset

Calculated from the capacity and generation records in this dataset (WRI Global Power Plant Database (CC BY 4.0)).

Capacity vs largest hydro plants in Madagascar

Installed capacity (MW), WRI Global Power Plant Database (CC BY 4.0).

Local climate & thermal context

This hydro plant converts the energy of falling or flowing water through hydro turbines. It sits in a tropical rainforest climate (Köppen Af) — Southern Hemisphere, latitude 18.8°S — 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 corrosive environment (estimated ISO 9223 class C4 — High), 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 #1 largest hydro power plant of 5 in Madagascar by capacity.

Madagascar has 5 hydro power plants in this dataset, together about 113 MW of capacity.

Nearby power plants

• Ambatovy · Coal · 120 MW · Alaotra Mangoro
• La Mandraka · Hydro · 24 MW · Analamanga
• Tsiazompaniry · Hydro · 5.2 MW · Analamanga
• Antelomita · Hydro · 8.9 MW · Analamanga
• Ambatovy Nickel power station · Coal · 120 MW · Toamasina
• Tamatave · Gas · 16.6 MW · Atsinanana

Location

Coordinates -18.7942, 48.6193 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions