Akuo Plans 80-MW Battery Storage in Portugal

• Akuo will build an 80-MW battery storage project in Portugal to boost grid flexibility, deliver fast frequency response, ease congestion, and enable more solar and wind.

Akuo plans to develop an 80-MW battery energy storage system in Portugal, aiming to add grid flexibility as the country expands renewables and faces growing needs for reliable evening power. The project is expected to deliver fast response and help ease congestion, supporting higher levels of solar and wind on the grid.

At this scale, the battery may be used in a multi-purpose model, providing energy shifting, frequency response and reserves, and potentially localized grid support at constrained nodes. Akuo says the main value will come from software and dispatch optimization that co-ordinates revenue streams while managing battery degradation and meeting availability requirements, improving financing prospects through capacity and ancillary-service income.

How will Akuo’s 80MW Portugal battery improve evening power, flexibility, and grid reliability?

• Evening power support: Stores surplus renewable generation from late afternoon and early evening, then discharges during the night peak demand window to reduce the gap between renewable output and electricity needs.
  
• Smoother solar and wind ramping: Uses rapid charging/discharging to counter the typical post-sunset drop in solar and the variability of wind, helping utilities avoid steep net-load changes.
  
• Fast grid response: Can inject or absorb power quickly to help stabilize voltage and system frequency, which is especially valuable when demand rises and generation becomes harder to predict.
  
• Improved operational flexibility: Adds a controllable “dispatchable” resource, allowing system operators to react to outages, forecast errors, and unexpected changes without relying solely on slower fossil or hydro units.
• Stronger reserve capability: Can contribute to ancillary services such as operating reserves and reserve capacity, giving the grid an additional buffer against short-term imbalances.
• Reduced congestion impacts: By supplying power where and when constraints appear, storage can lower the burden on overworked transmission paths, potentially limiting curtailment and congestion-driven constraints.
• More renewable integration: Makes it easier to keep higher shares of solar and wind online by absorbing excess energy when production is strong and releasing it when output falls.
• Reliability during peak periods: Enhances security of supply by providing dependable, scheduled or trigger-based discharge during evening peaks—times when margins can tighten.
• Voltage support and local robustness: Depending on grid connection and control settings, it can provide localized support at constrained locations, reducing stress on specific network segments.
• Better predictability for dispatch and markets: Enables more granular scheduling using dispatch logic and performance tracking, helping monetize flexibility while meeting availability requirements.
• Degradation-aware management: Uses operational strategies designed to extend usable life (e.g., limiting stress, managing depth of discharge, and planning cycles), supporting long-term performance needed for reliability services.