Top 25 Green Energy startups in Spain
Nov 11, 2025
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16
1
Funding: $2.1B
ACCIONA is the development and management of infrastructure, renewable energy, water, and services.
ACCIONA is the development and management of infrastructure, renewable energy, water, and services.
2
Funding: $284.9M
Fotowatio Renewable Ventures is providing comprehensive renewable energy solutions across the globe.
Fotowatio Renewable Ventures is providing comprehensive renewable energy solutions across the globe.
3
Funding: £124M
Plastic Energy offers a sustainable solution to help prevent plastic pollution by transforming previously unrecyclable plastic waste into and optimal feedstock for making clean recycled plastics or alternative law-carbon fuels.
Plastic Energy offers a sustainable solution to help prevent plastic pollution by transforming previously unrecyclable plastic waste into and optimal feedstock for making clean recycled plastics or alternative law-carbon fuels.
4
Funding: €52.8M
Basquevolt is a developer of solid-state lithium batteries for electric vehicles, heavy transport, renewable energy, and electronic devices.
Basquevolt is a developer of solid-state lithium batteries for electric vehicles, heavy transport, renewable energy, and electronic devices.
7
Funding: €36.3M
Holaluz supplies green power and gas to SMBs and households across Spain, as the first independent energy company in the country.
Holaluz supplies green power and gas to SMBs and households across Spain, as the first independent energy company in the country.
8
Funding: $30.2M
Bound4blue is working on a unique renewable energy system for large vessels. It consists in the production of hydrogen and oxygen by means of electrolysis of seawater. The vessel is propelled by wind-driven wingsails, as water fills the ship’s turbines to produce mechanical energy, then transformed into electrical energy.
Bound4blue is working on a unique renewable energy system for large vessels. It consists in the production of hydrogen and oxygen by means of electrolysis of seawater. The vessel is propelled by wind-driven wingsails, as water fills the ship’s turbines to produce mechanical energy, then transformed into electrical energy.
9
Funding: €18M
Samara offers an online configurator to help householders choose a photovoltaic system to buy or rent and other digital energy products, as well as connecting them with a network of local installers to carry out the work.
Samara offers an online configurator to help householders choose a photovoltaic system to buy or rent and other digital energy products, as well as connecting them with a network of local installers to carry out the work.
10
Funding: $12.3M
Zeleros is leading the hyperloop development or the so-called “the fifth means of transportation”.
Zeleros is leading the hyperloop development or the so-called “the fifth means of transportation”.
12
Funding: $6.1M
RatedPower developed pvDesign app, the leading cloud-based software to design and engineer Solar Power plants. Acquired by Enverus
RatedPower developed pvDesign app, the leading cloud-based software to design and engineer Solar Power plants. Acquired by Enverus
13
Ampere provides batteries that use energy more efficiently. We are working to promote a new energy model that is cheaper, more sustainable, more environmentally friendly and consumer-led, because we believe that the future of energy depends on how intelligently we use it.
14
Funding: $3.8M
DEXMA is a SaaS-based platform providing energy management software to the corporate, public administration, and industrial sectors.
DEXMA is a SaaS-based platform providing energy management software to the corporate, public administration, and industrial sectors.
15
Funding: €3.1M
Bioo is a biotech company focused on the biotechnological transformation of our world through unique proprietary technologies able to generate electricity from nature among others, with a team comprised of top world leaders in their areas with the vision of creating the first biotech buildings and cities.
Bioo is a biotech company focused on the biotechnological transformation of our world through unique proprietary technologies able to generate electricity from nature among others, with a team comprised of top world leaders in their areas with the vision of creating the first biotech buildings and cities.
16
Funding: €3M
Eave is a renewable energy company that specializes in providing solar panels and car charger points installation services.
Eave is a renewable energy company that specializes in providing solar panels and car charger points installation services.
17
Funding: $120K
Vortex Bladeless is developing an environmentally friendly aerogenerator which needs no blades. It is a new wind energy technology specially designed for on-site generation in residential areas, being able to work on-grid, off- grid, or along with regular solar panels or other generators.
Vortex Bladeless is developing an environmentally friendly aerogenerator which needs no blades. It is a new wind energy technology specially designed for on-site generation in residential areas, being able to work on-grid, off- grid, or along with regular solar panels or other generators.
18
Funding: €2.7M
Silbat is a electricity storage technology that can turn intermittent renewable energies into fully dispatchable electricity sources.
Silbat is a electricity storage technology that can turn intermittent renewable energies into fully dispatchable electricity sources.
19
Funding: $2M
Onyx Solar is the world’s leading manufacturer of transparent photovoltaic (PV) glass for buildings. PV Glass is used as a building material plus as an energy-generating device, capturing the sunlight and transforming it into electricity.
Onyx Solar is the world’s leading manufacturer of transparent photovoltaic (PV) glass for buildings. PV Glass is used as a building material plus as an energy-generating device, capturing the sunlight and transforming it into electricity.
20
Magallanes Renovables is developing tidal energy floating platform, with double high output rotors with a combined power of 1,5MW.
21
Funding: $1M
Nnergix is a weather analytics startup focused in the renewable energy industry.
Nnergix is a weather analytics startup focused in the renewable energy industry.
22
Funding: €551.3K
Bamboo Energy develops a platform for retailers and aggregators to easily manage and trade distributed flexibility resources. The platform forecasts consumption, flexibility, and market conditions for optimal portfolio management.
Bamboo Energy develops a platform for retailers and aggregators to easily manage and trade distributed flexibility resources. The platform forecasts consumption, flexibility, and market conditions for optimal portfolio management.
23
Funding: $220K
Rawlemon is a solar power device maker like no other. From research to prototyping and marketing, we set the pace. We just squeeze more juice out of the sun. With our award winning technology we aim to make solar power a reality for all.
Rawlemon is a solar power device maker like no other. From research to prototyping and marketing, we set the pace. We just squeeze more juice out of the sun. With our award winning technology we aim to make solar power a reality for all.
24
Funding: €71.4K
Arrecife Energy Systems develops unique wave energy converter. Arrecife is designed to work with the most common waves from 1 to 5 high waves (98%), which means more efficiency both in the manufacturing and in the energy production, working at full capacity during more hours.
Arrecife Energy Systems develops unique wave energy converter. Arrecife is designed to work with the most common waves from 1 to 5 high waves (98%), which means more efficiency both in the manufacturing and in the energy production, working at full capacity during more hours.
25
Sirocco Energy develops panel wind generator. In contrast to horizontal or vertical wind turbines, wind panel has translatory motion of the blades, not rotational one. This gives the panel a scope of advantages, which makes it efficient and convenient for the urban usage.
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