4 FAQs about Portugal energy storage technologies

Can storage replace thermal generation in Portugal?

The pursuit of economic viability by storage facility owners will inherently lead to charging during low-cost hours and discharging during hours that are more economically attractive. Storage can replace thermal generation in constraint markets, easing the grid and supporting Portugal's 2040 phase-out target.

Why is storage important in Portugal?

Storage provides real-time flexibility, enabling participation in balancing markets and maintaining grid stability and inertia, especially in Portugal where these markets are growing. Despite the increase in interconnection capacity between Spain and Portugal, it could experience congestions during non-solar hours.

What is the reservoir capacity of Portugal?

The total reservoir capacity is equal to 13,290 hm 3 and the biggest reservoir capacities can be found for Guadiana and Tagus, which are rivers with their origin in Spain . Portugal currently has an installed hydropower generation capacity of 8.2 GW (5.3 dammed hydropower plants and 2.9 run-of-river), from which 3.6 GW are pumped hydro storage.

Can solar power meet Portuguese demand?

Their simulations show that combining solar, wind and at least four hours of battery storage can meet Portuguese demand in 94 % of hours across an average year; add pumped hydro and that rises above 99 %. The remaining gap could be filled by green hydrogen or demand-response contracts that pay factories to pause production when clouds linger.

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