British company Octopus Energy has launched a plan to add 600 MW of solar energy with storage in Spain , a combination of new photovoltaic and battery systems designed to provide greater flexibility to the electricity grid. According to figures released by the company, this capacity could be equivalent to the electricity consumption of up to 2,3 million homes.
The scheme is divided into 100 MW of newly incorporated solar plants in Navarra and Albacete and a storage development that aims to reach 500 MW in five years , with a gradual implementation as permits and connections progress.
What does the 600 MW plan include?
The photovoltaic plant comes from two acquisitions in Navarre and Albacete , with a combined capacity of 100 MW. The energy generated will be supplemented by batteries to store surplus solar power and release it during peak hours, reducing grid inflows and smoothing out demand peaks.
In parallel, Octopus is backing a specialized developer that plans to deploy 500 MW of storage capacity over the next five years. This deployment will provide grid flexibility and stability , a key element as renewable energy sources become increasingly important.
The financing is being channeled through the Sky fund (ORI SCSp) , a vehicle of Octopus Energy Generation, which manages over €2.200 billion in renewable assets . This fund is also exploring battery projects in Italy, the UK, and France.
To accelerate execution, the company has taken a stake in One Solar (Barcelona), a technology advisory firm that helps companies design, build and operate photovoltaic and storage facilities more efficiently.
Octopus' management in Spain emphasizes that energy storage is essential for the energy transition and highlights the opportunity to generate skilled employment, attract investment, and build a more resilient economy with clean energy.
Effects on the electrical system and the market
The combination of photovoltaics and batteries aims to improve the integration of renewables into the Spanish grid, reducing curtailment during peak production hours and providing backup during periods of low solar generation.
By shifting energy from off-peak hours to periods of higher demand , batteries can help ease pressure on wholesale prices and strengthen security of supply without increasing emissions.
The implementation schedule anticipates the commissioning of successive sections as administrative procedures progress, access points become available, and long-term contracts are signed.
The company has not disclosed any financial amounts, but has confirmed that the announcement was made during a UK-Spain bilateral meeting in London, in line with its European growth strategy in storage.
Octopus's position in Spain and Europe
Octopus Energy landed in the Spanish market in 2021 with its retail business and today has more than 350.000 customers , being the fastest growing independent supplier according to the CNMC, with more than 170.000 new customers in 2024.
Their goals include reaching one million customers by 2027. Among their initiatives are a smart tariff for electric vehicle charging and more than 7.000 residential installations of solar panels and chargers.
In user reviews, the company has high scores on review platforms , although it maintains a cautious position to continue expanding services and coverage.
Globally, Octopus Energy Generation manages a portfolio of more than 4,9 GW , which strengthens its ability to deploy projects and scale storage solutions in several European countries.
International context and next steps
The Spanish plan aligns with the expansion of battery initiatives in Italy, the United Kingdom, and France, which will allow for the sharing of lessons learned in asset operation and maintenance and the optimization of business models.
The next milestones will involve securing permits, interconnections, and contracts that facilitate continuous development, as well as exploring solar-battery colocation to maximize infrastructure use and reduce costs.
With the combination of 100 MW of photovoltaic capacity already acquired and a target of 500 MW in batteries within five years, Octopus's move consolidates storage as a central element for integrating more renewables in Spain, backed by the Sky fund and the support of partners such as One Solar, and with the potential for a direct impact on system stability and consumer competitiveness.
