Conversations that matter

Strategic Energy Europe•May 2025

Portugal resumes energy imports from Spain with restrictions after the 28A blackout

News about the partial resumption of electricity imports from Spain to Portugal following the blackout on April 28. Analyze the impact on electricity prices and explain the measures taken by the Portuguese authorities. Alejandro A. Díaz González is cited as a renewable energy consultant and points out that limiting imports increases the bill because it forces the use of natural gas to stabilize the grid.

Strategic Energy Europe•February 2025

Can blockchain boost Europe’s energy leadership against China and the US?

Article-interview in which Alejandro A. Díaz González, creator of TheryOS, analyzes the potential of digital technologies such as blockchain and artificial intelligence to transform the European electricity market. He points out that, unlike other sectors, users still do not have enough information to make energy decisions and advocates for an open ecosystem that redistributes decision-making capacity and allows for the tokenization of energy assets and P2P markets. He also warns that innovation should not depend on manufacturers and that leadership in these technologies may come from startups outside the energy sector.

Strategic Energy Europe•November 2024

Top 110 renewable energy influencers with the most followers on LinkedIn

List compiled by Energía Estratégica España ranking the professionals in the Spanish renewable sector with the most followers on LinkedIn. Alejandro A. Díaz González appears in 69th place with 12,871 followers, acknowledging his influence on social media in the field of renewable energy.

Virtual batteries vs. physical batteries for photovoltaic surplus storage

Article-interview in which Alejandro A. Díaz González, creator of TheryOS, analyzes the potential of virtual batteries versus physical ones and their hybridization scenarios.

Review Energy•May 2023

Lack of personnel for solar self-consumption: a 'big problem' for the sector

Report on the shortage of skilled professionals in photovoltaic self-consumption installations. Alejandro A. Díaz González, creator of TheryOS, describes the situation as a 'big problem', criticizes that large electric companies and installation firms are hiring untrained personnel, and warns that this bubble could affect the quality of the projects.

Galicia hosts Spain’s largest industrial energy community

Grupo Vagalume Energía, led by its CEO Alejandro Díaz, and the construction company Santiago Sur Galicia have created in Novo Milladoiro the largest industrial energy community in Spain, with over 650 kW of photovoltaic installed in eleven warehouses. The project stands out for its technological innovation, with a panel-by-panel monitoring system that generates an energy Big Data to optimize production and consumption in real-time. Through its marketer Biowatio, Vagalume manages the joint purchase of electricity and the sale of surpluses, ensuring a 30% saving in consumption and a 15% reduction in the electricity bill. Additionally, it is planned to incorporate storage, electric vehicle charging, and heating with local biomass, consolidating a mixed and 100% renewable energy community. This initiative reinforces Galicia's role as a national benchmark in energy transition and Alejandro Díaz's vision of a model where technology, efficiency, and sustainability are keys to competitiveness.

Vagalume Energy app allows calculating the cost and savings of self-consumption

The article describes an application developed by Vagalume Energía that calculates the cost, savings, and payback time of a photovoltaic installation for both individuals and companies. Alejandro A. Díaz González explains that the tool allows anyone to know how much a self-consumption installation would cost and demonstrates that the energy transition is already a reality.

Expansión•December 2019

Vagalume Energía transforms into a comprehensive energy group

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Vagalume Energía, led by Alejandro Díaz, is in the process of transforming into a comprehensive energy group, expanding its activities beyond consultancy to include financing, installation, and management of self-consumption projects. The company, based in Galicia with subsidiaries in Mexico, Guatemala, the Dominican Republic, and Portugal, has strengthened its international expansion and expects to bill more than 10 million euros in 2020, with a projection to exceed 30 million in 4 years. The group has secured significant agreements in Mexico for self-consumption projects in more than 50 gas stations and hotels, and is working on similar initiatives in Panama, Colombia, and other Latin American countries. It has also launched PPAs and projects in Galicia, Portugal, and Guatemala, consolidating a model that combines renewable energies with tailored financial solutions. Alejandro Díaz highlights that this evolution is a natural growth strategy, focusing on technological innovation, big data, and the integration of energy services to ensure efficiency and profitability for its clients.

La Voz de Galicia•June 2019

The Galician company that sells how to save electricity

Report on Vagalume Energía highlighting that, thanks to the use of Big Data and artificial intelligence, the company can predict energy consumption, optimize energy purchase contracts (PPAs), and offer self-consumption and mobility solutions. It also notes its international expansion to Latin America and its pioneering role in energy purchase agreements with Galician wineries.

Energías Renovables•May 2018

Two Galician wineries switch to self-consumption with 'crowdlending'

The media reports that the wineries Terras Gauda and La Val hired Vagalume Energía to install photovoltaic systems financed through a collective loan (crowdlending) on the Ecrowd platform. Alejandro A. Díaz González, CEO of Vagalume, emphasizes that this financing allows more people to get involved in the energy transition and conveys that self-consumption is a sustainable and profitable alternative. He also highlights the pioneering role of Galicia in self-consumption and the consumption profile of the wineries.

Aedeec•September 2017

"European Medal for Merit in Work" to Vagalume Energia

The European Association for Economy and Competitiveness awarded its Gold Medal for Merit in Work in Madrid, recognizing companies and institutions for their trajectory. Among the awardees was the Galician company Vagalume Energía, led by its CEO Alejandro Díaz, which in just five years has established itself as a benchmark in the energy sector with sustained growth and a strong international projection, especially in Mexico. This award adds to the four previous awards received by the company, which is preparing a new capital increase after having already raised €228,650 in 2015.

La Voz de Galicia•April 2017

Self-consumption is legal, profitable, and the best solution to avoid the fluctuations of the electricity market

Article explaining how Vagalume Energía became a reference in efficiency and self-consumption in Galicia. Alejandro A. Díaz González argues that self-consumption in Spain is completely legal and profitable, and that it constitutes the most effective solution for companies to mitigate the volatility of the electricity market because it is always cheaper to generate one's own energy than to buy it from a supplier.

Funding round of €228,620 on Crowdcube for Vagalume Energía

Coverage of the crowdfunding round on Crowdcube in which Vagalume Energía raised €228,620, with an average investment of €5,316 per participant. The articles review the profile of the company, founded by marine biologist Alejandro A. Díaz González, specializing in self-consumption and energy efficiency, and mention the awards received (Young Entrepreneur of the Year 2014 and Cantábrico Excellent Award 2015). They also mention international expansion plans, including Mexico.

El Suplemento•October 2015

The cheapest energy is the one not consumed (Cantábrico Excellent Award 2015)

Chronicle of the 2015 Cantábrico Excellent Award ceremony in the Efficiency category for Vagalume Energía. During his speech, Alejandro A. Díaz González states that 'the cheapest energy is the one not consumed,' thanks his clients for their trust, and dedicates the award to his father. The article recalls that the company created Spain's first self-consumption cluster (Agaen) in 2012 and details its service portfolio and international expansion.

Gust.com•November 2014

Young Entrepreneur of the Year Award 2014 (Pontevedra)

The profile of Vagalume Energía on Gust.com indicates that Alejandro A. Díaz González, founder and CEO, received the Young Entrepreneur of the Year 2014 award in Pontevedra. It also notes that he is vice president of the Energy Self-Consumption Cluster of Galicia and summarizes his career in renewable energies and energy efficiency.