Lorraine Williamson
Spain has expanded its proposed electricity transmission network plan to more than €17 billion through 2030, around 30% above the amount originally envisaged, as demand for access to the country’s power grid accelerates.
Energy Minister Sara Aagesen announced the revised figure in Congress on Wednesday, describing it as the largest investment in electricity networks in Spain’s history. The plan remains in the approval process and has not yet received final approval from the Council of Ministers.
The increase follows the public consultation on Spain’s proposed electricity network plan to 2030. The original proposal, presented last year, envisaged investment of €13.59 billion, already considerably higher than the €8.2 billion contained in the current 2021–2026 plan.
After analysing 2,566 submissions, the investment envisaged in the new plan has increased by approximately 30%.
Why Spain needs a much bigger electricity network
Spain has rapidly expanded renewable electricity production, particularly solar and wind power. But producing electricity is only part of the challenge.
Increasingly, pressure on the grid is coming from the other direction: industries, ports, railways, new businesses and housing developments all seeking additional electricity capacity.
The resilience of Spain’s electricity network has also faced intense scrutiny since the huge Iberian blackout of April 2025, which disrupted transport, businesses and daily life across Spain and Portugal. Earlier this year, Energy Minister Sara Aagesen called on power companies to make their blackout data public as questions continued over responsibility for the outage.
Aagesen told Congress that while requests for grid access under the previous planning cycle were predominantly connected with renewable generation, there is now much greater demand to electrify the wider economy.
That shift matters economically. A factory, new housing development or major infrastructure project may have access to abundant renewable energy nationally, but it still requires sufficient network capacity in the right location to use it.
193 substations and thousands of kilometres of power lines
The revised proposals are substantial in physical terms as well as financial ones.
The number of planned substations has increased by 17% to 193, while the proposed length of electricity lines has risen by 11% to 6,706 kilometres. Another 8,164 kilometres of existing network are expected to have their capacity increased, 6% more than envisaged before the consultation.
Infrastructure associated with railway routes and the electrification of ports has seen an even larger increase. The number of positions included for these projects has risen by 75% to 59.
Demand now accounts for 41% of the proposals, marginally ahead of electricity generation at 40%. Storage represents the remaining 19%.
Those figures underline how Spain’s energy challenge is changing. The country still needs to connect renewable generation and storage, but accommodating people and businesses wanting to consume electricity is becoming just as important.
From factories and ports to new homes
Industrial development is one of the Government’s priorities.
Spain’s relatively large renewable-energy resources are increasingly being presented as an advantage when competing for industries looking for lower-carbon electricity. But electrification is spreading well beyond large factories. Ports, railway infrastructure, electric transport and residential developments are all adding to demand.
When the original proposal was unveiled in September 2025, the Government said the €13.59 billion plan was intended to anticipate network requirements, support industrial projects and allow more renewable generation and storage to be incorporated into the system.
The scale of the revision less than a year later illustrates how quickly those requirements have grown.
The separate €17.9bn decision made in July
Today’s announcement should not be confused with a related Government decision made in July.
On 28 July, the Council of Ministers approved new rules allowing up to €17.9 billion of additional investment in Spain’s electricity transmission and distribution networks through 2030.
That regulatory framework raised the amount that could be invested above existing limits linked to GDP. It allowed up to €10.2 billion of additional distribution-network investment and up to €7.7 billion for the transmission network, depending on the final planning approved by the Government.
The announcement made in Congress on Wednesday concerns the 2030 electricity transmission planning proposal itself, which has grown from the €13.59 billion originally proposed to more than €17 billion following consultation.
The two measures are closely connected, but they are not the same announcement.
What could this mean for electricity bills?
For households, the headline investment figure does not translate into an immediate multibillion-euro charge appearing on electricity bills.
Spain regulates the amount that can be invested in electricity networks through the system, and the Government has said expanding infrastructure must be balanced against keeping electricity prices competitive. When the original 2030 proposal was presented, MITECO specifically identified protecting consumers and containing electricity costs as part of the planning process.
At the same time, electricity networks ultimately have to be financed. How investments are recognised within the regulated system, how quickly projects are completed and how electricity demand develops will therefore matter for future network costs.
The Government argues that a stronger network should also allow Spain to make better use of relatively low-cost renewable electricity, reduce bottlenecks and attract investment.
The plan is not final yet
Despite the size of Wednesday’s announcement, the revised 2030 plan has not yet completed the approval process.
The next stages include presentation to Spain’s autonomous communities and another passage through Congress before the final planning is submitted to the Council of Ministers for approval.
That distinction is important. The Government has not suddenly approved a new €17 billion spending package today; instead, the proposed network plan being developed for the rest of the decade has become considerably larger. What has changed is the scale of Spain’s ambition — and the evidence of just how quickly demand for electricity connections is growing.
Spain has spent years expanding its ability to produce renewable power. The next challenge is increasingly about whether the network can move that electricity to the homes, businesses, factories and infrastructure that want to use it.