Portugal’s 71% Renewable Electricity Share in 2024

New figures from Portugal’s grid operator point to a pivotal moment for clean electricity. The energy mix changed rapidly, with implications for investors, system planners and households alike.

Portugal’s understated advantage over Germany

National system figures show that renewable sources met 71% of Portugal’s electricity consumption in 2024. Germany, Europe’s industrial powerhouse, also advanced quickly but remained below this level. Portugal achieved the result through a diversified mix, with hydropower, wind, solar and biomass either expanding or maintaining robust performance.

Portugal posted a 71% renewable electricity share in 2024, led by hydro at 28% and wind at 27%, with solar at 10% and biomass at 6%.

The generation volumes behind that percentage are equally significant. Renewable output totalled 36.7 TWh in 2024, indicating overall electricity demand of roughly 51.7 TWh. The figures below combine each source’s share with estimated generation to show the scale involved.

Source	Share of consumption	Approx. output (TWh)
Hydropower	28%	~14.5
Wind	27%	~14.0
Solar PV	10%	~5.2
Biomass	6%	~3.1

Solar’s breakthrough year

Solar recorded the sharpest increase, with generation climbing 37% year on year as Portugal brought online both large-scale solar parks and a continuing flow of rooftop installations. Cheaper modules, shorter construction periods and clear auction signals supported this growth. During many midday periods, solar generation displaced gas-fired plants in the merit order. Curtailment remained modest because of interconnections and flexible hydropower.

Hydropower makes a strong return

Hydropower generation rose 24%, helped by a better hydrological year and effective dispatch decisions. Reservoir operators used stored water to smooth fluctuations in wind and solar output. Pumped storage provided further flexibility by absorbing surplus electricity outside peak hours. This recovery differs sharply from drought-affected years, when hydropower’s buffer diminished and imports increased. Water availability remains a risk, however, so operators continue to monitor seasonal forecasts closely.

Wind remains resilient

Wind provided a near-baseload foundation through winter storms and coastal winds. Repowering turbines increased output without enlarging their physical footprint. Grid improvements also lowered curtailment during particularly windy nights. Offshore wind is still planned, with seabed planning becoming clearer, although most progress to date has come from onshore fleets.

Gas falls to a 21-year low

Fossil-fuel generation supplied only 10% of electricity consumption in 2024. Gas use for power generation dropped 17%, reaching its lowest point since 2003. LNG deliveries nevertheless remained important for energy security. System records show that Nigeria accounted for 53% of shipments and the United States for 41%. Fewer hours of gas generation reduced carbon intensity and lowered wholesale prices during wet and windy periods.

Gas consumption for electricity fell 17% in 2024, hitting its lowest level since 2003 as renewables pushed into peak hours.

Why the increase occurred

• Stable policy: consistent auctions, financeable contracts and transparent grid rules.
• Hydropower flexibility: reservoirs and pumped storage that balance solar peaks and bursts of wind generation.
• Quicker permitting: reduced administrative requirements for repowering projects and medium-sized solar schemes.
• Interconnection: extensive trade with Spain that assists hour-by-hour balancing.
• Rooftop growth: self-consumption arrangements that increase daytime supply and reduce demand.

Implications for bills, grids and neighbours

Greater volumes of power with zero marginal cost generally depress prices during windy or rainy conditions. Consumers benefit from this, although price volatility also rises. Portugal’s grid managed larger intraday movements through hydropower, batteries and cross-border flows to Spain’s market. Constraints still occur on stormy nights. Storage developments are intended to capture these low-price periods and sell power back during the evening peak.

Industrial consumers gain more flexibility as well. Companies can enter into power purchase agreements linked to local wind or solar projects. Data centres and electricity-intensive facilities can shift part of their consumption to periods when prices fall. Accurate forecasting is therefore essential for the grid operator, making improved weather models and plant telemetry central to everyday operations.

The key risk concerns water supply. A dry year could reduce hydropower output and require gas to return as a backup source. Policy measures protect demand through efficiency improvements, heat pumps and more intelligent tariffs. The Iberian market also softens disruptions, as Spain’s energy mix can fill shortages and absorb excess output when conditions change.

Europe’s broader picture

Across the EU, renewables exceeded half of electricity generation in the first half of 2024. Wind and solar contributed around 30% of the mix, while fossil fuels fell to close to 27% amid lower demand and strong renewable generation. Europe is expected to add substantial wind capacity through 2027, with more than 100 GW planned. Solar continues to grow at both utility-scale and rooftop level.

Germany installed a substantial volume of solar panels and wind turbines in 2024. Its renewable share nevertheless remains below Portugal’s because German electricity demand is far larger and more industrial. Portugal benefited from a smaller grid, plentiful hydropower and fast solar deployment, all of which magnified the annual percentage change.

What to monitor in 2025

• Hybrid projects: solar paired with wind or hydropower to use shared grid connections.
• Battery pipelines: four-hour systems targeting evening peaks and balancing day-ahead forecasts.
• Floating PV on reservoirs: reduced land use and closer integration with hydropower assets.
• Green hydrogen pilots: off-peak consumption in locations where pipelines and ports already exist.
• EV charging load: managed charging that makes vehicles a flexible source of demand.

Two useful points for readers

Capacity factor is often misunderstood. It describes average generation over a given period as a proportion of the maximum generation theoretically possible. Portugal’s wind farms generally operate at about 30% to 40% over a year. Solar typically achieves closer to 20% to 25%, depending on site location and panel angle. These values influence revenue and grid planning because they indicate when electricity is actually produced.

A household illustration makes this clearer. Under favourable conditions, a 5 kW rooftop installation in Lisbon can generate around 7,500 kWh annually. A typical flat consumes 2,500 to 3,000 kWh. Using self-consumption rules and a smart inverter, a household could meet most of its daytime needs and export the surplus. Adding a small battery moves late-afternoon solar production into the evening meal period. Payback varies according to the tariff, roof pitch and equipment price, but the economics are increasingly moving towards installation.