Microsoft (MSFT) has signed a long-term Power Purchase Agreement (PPA) with Zelestra for 95.7 MWAC of solar power. The energy will come from two new solar farms in Aragón, Spain — Escatrón II and Fuendetodos II, both under construction. This clean energy will help power Microsoft’s data centers and operations in the region. It also supports Microsoft’s wider climate goals.
A Solar Deal That Shines Beyond Power
Beyond simply buying solar power, Microsoft is tying this deal to benefits for the local community. The non-profit ECODES will run a “Community Fund” financed by this PPA. ECODES plans to use this fund to support sustainability projects in Aragón. They will invest in local infrastructure, social inclusion, and environmental education.
Zelestra calls its strategy “3 Es”: Education, Energy, and Environment. Microsoft sees this as part of its “Datacenter Community Pledge,” which aims to ensure its operations help local areas as well as reduce its carbon footprint.
Why Microsoft’s 95.7 MW Bet Matters
This solar agreement matters for several reasons:
- Reliable clean energy: The 95.7 MW solar supply gives Microsoft a stable source of renewable power.
- Social benefits: ECODES will channel money into projects that help local people and ecosystems.
- Long-term local commitment: Zelestra intends to stay in Aragón and work with communities for years.
This structure shows how a big company can use a clean energy deal not just for itself, but for shared community value.
Spain’s Solar Boom and Zelestra’s Expanding Footprint
Solar power in Spain is booming. In the last few years, the country has added thousands of megawatts of solar capacity. According to Informa’s DBK report, solar energy grew by 6,000 MW in just one year, reaching 32,350 MW by 2024.
Red Eléctrica (the Spanish grid operator) data shows that by early 2025, solar PV installed capacity passed 32,000 MW, making solar the largest source of power capacity in Spain.
This growth reflects a major shift in Spain’s energy mix. In 2024, solar PV generated a record 44,520 GWh of electricity, about 17% of the country’s total electricity output.
At the same time, renewables now make up around 66% of Spain’s total power generation capacity. These numbers show how central solar power has become to Spain’s energy transition.
The outlook is even more ambitious. According to GlobalData, Spain’s solar capacity could reach 152.8 GW by 2035, driven by strong policy support and growing investor confidence. To fuel this, many new projects are already in the permitting stage.
In 2025 alone, more than 5 GW of solar projects were submitted for environmental approval. Castilla‑La Mancha is a major one of those major regions, and it stands out in Zelestra’s portfolio.
Zelestra is a major player in this growth. In 2025, it secured €146.6 million to build six solar plants in Castilla‑La Mancha, totaling 237 MWdc. These projects will create jobs, generate around 467 GWh of clean energy per year, and avoid over 84,000 tons of CO₂ emissions annually.
Zelestra is also expanding its corporate partnerships, providing renewable electricity for companies like Microsoft and Graphic Packaging International. Its portfolio in Spain exceeds 6 GW, showing its strong commitment to the country’s clean energy transition and its role as a key developer of large-scale solar projects.
Inside Microsoft’s Push Toward Carbon Negativity
Microsoft has set strong climate goals. In 2020, it announced its plans to be carbon negative by 2030. That means by then, it wants to remove more carbon from the atmosphere than it emits.
To reach this, the tech giant is doing several things:
- It has contracted 34 GW of new renewable energy across 24 countries.
- It aims to match 100% of its electricity use with zero‑carbon power by 2025.
- It invests in carbon removal. In fiscal year 2024, Microsoft signed contracts for nearly 22 million metric tons of carbon removal.
- It uses a $1 billion Climate Innovation Fund to support new technologies.
Progress and Challenges in Emissions
Microsoft has made real progress, but it also faces big challenges. Its Scope 1 and Scope 2 emissions (those from its own operations and electricity use) dropped 29.9% compared to 2020.
But its total emissions (including its supply chain, or “Scope 3”) rose by 23–26% since 2020. This increase comes mainly from its rapid growth in data centers and cloud services.
Because it makes a lot of servers, chips, and hardware, Microsoft’s construction and supply chain also generate emissions. To cut those, it is working with its suppliers. By 2030, Microsoft plans to require high-volume suppliers to use 100% carbon‑free electricity.
Microsoft’s clean energy capacity has grown steadily since 2013, starting with wind projects in the U.S. By 2022, capacity reached 900 MW with wind and solar projects in Europe and the U.S.
In 2024, Microsoft signed the largest corporate clean energy deal for 10.5 GW with Brookfield Renewable, delivering by 2030. This reflects Microsoft’s goal to power all operations with 100% renewable energy by 2030, underscoring its leadership in global sustainability efforts.
Carbon Removal and Long-Term Risks
Microsoft is not just cutting emissions, it is also removing carbon. It invests in two big types of removal:
- Nature-based removal: Microsoft has a deal with Chestnut Carbon to buy over 7 million tons of forest-based carbon credits.
- Advanced removal: Microsoft supports projects like bioenergy with carbon capture and storage (BECCS). It recently backed a project in Louisiana that could capture 6.75 million tons of CO₂ over 15 years.
Still, some experts warn that Microsoft’s climate strategy lacks targets beyond 2030. That could challenge its long-term impact.
SEE MORE on Microsoft:
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- Microsoft Leads on Climate: $800M CIF Drives Clean Tech and AI Energy Deals with ADNOC, Masdar, and XRG
How the Solar Deal Fits into Microsoft’s Strategy?
The 95.7 MW deal in Spain ties directly into Microsoft’s overall carbon-negative goal. Here’s how it fits:
- It adds zero-carbon electricity to Microsoft’s grid mix.
- It supports Microsoft’s plan to match all its power use with clean energy.
- The deal’s community fund reinforces Microsoft’s aim to pair climate action with social value.
- It strengthens Microsoft’s global clean energy portfolio.
This helps Microsoft reduce its operational emissions (Scope 1 & 2) and supports its broader mission to remove carbon.
What’s Next for Microsoft, Zelestra, and Local Communities?
If all goes well, the two solar farms in Aragón will come online and deliver power to Microsoft for many years. The ECODES fund should start giving out grants to local groups, helping build greener projects in the community.
The tech giant must also keep pushing its carbon removal work and supplier engagement. It needs to make sure its long-term investments bring real, measurable climate impact.
Zelestra, for its part, will prove whether it can deliver reliable solar and meaningful social impact. If the model works, more companies may use similar “clean energy + community” contracts.
The agreement is more than just about cutting emissions — it’s also about helping local communities. At the same time, Microsoft’s push to be carbon negative by 2030 is ambitious and complex. It involves clean power, carbon removal, and changes in its entire supply chain.
This Spanish solar deal adds a new piece to Microsoft’s climate puzzle. It strengthens its clean energy supply and shows how corporate climate goals can benefit more than just the bottom line.