Montalto di Castro - Solaer Solar Power Plant — Italy

Montalto di Castro - Solaer Solar Power Plant is a 1 MW solar power plant in Latium, Italy. It is operated by Solaer. Based on its capacity (estimated), it can supply roughly 425 homes (estimated). It ranks #476 of 489 Italy power plants by installed capacity. As a non-combustion source, it has no direct CO₂ emissions from generation. In context, solar supplies about 16.9% of Italy's electricity; the national grid averages 285 gCO₂/kWh (48.8% low-carbon) (2025).

Plant data: WRI Global Power Plant Database (CC BY 4.0), id WRI1026419.

Capacity provenance

The public capacity above is the current source-record value. A 2026 tracker candidate lists 23 MW for Montalto di Castro (Iberdrola) solar far, but it is not used as the public primary value until scope is verified (unit vs operating vs installed/project total).

Data provenance

Source of the capacity and fuel values:

capacity: GEM · 2026 · L100001004204; fuel: WRI GPPD

In context: how this plant compares

At 1 MW, Montalto di Castro - Solaer Solar Power Plant is below the median solar plant in Italy (6 MW). Solar PV converts sunlight directly into electricity with no moving parts or fuel; output varies by time of day and weather, so it pairs with storage or flexible backup.

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

Key facts

Share of Italy solar capacity

less than 0.1% of 1,975 MW across 223 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 solar plants in Italy

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

Owner

Operated by Solaer. All plants by this company →

Local climate & thermal context

This solar plant converts sunlight directly into electricity with photovoltaic panels. It sits in a hot-summer Mediterranean climate (Köppen Csa) — Northern Hemisphere, latitude 42.4°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 37% below 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: 35/100 — this site sits in the mid third of the power plants we cover by heating degree-days.

Solar PV loses ~0.35%/°C above 25°C cell temperature — roughly 0.0% at warm-season highs here (estimate).

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 marine corrosion 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 #210 largest solar power plant of 223 in Italy by capacity.

Italy has 223 solar power plants in this dataset, together about 1,975 MW of capacity.

Nearby power plants

• MDC B · Solar · 6 MW · Latium
• MdC SolarWorld · Solar · 13.3 MW · Latium
• MdC ESA · Solar · 4 MW · Latium
• MdC Octopus SE · Solar · 15 MW · Latium
• MdC Octopus · Solar · 57.4 MW · Latium
• MdC Octopus S · Solar · 12 MW · Latium

Location

Coordinates 42.4067, 11.6104 from WRI Global Power Plant Database (CC BY 4.0). View on OpenStreetMap.

Frequently asked questions