Power Purchase Agreements (PPAs): Process, Challenges & Winning Clients at Zelestra

In the evolving renewable energy landscape, Power Purchase Agreements (PPAs) have become one of the most strategic tools for enabling decarbonization.

At Zelestra, PPAs sit at the centre of how we create long-term value providing stability for project financing while giving customers certainty, transparency, and clean energy aligned with their sustainability goals.

PPAs and Why They Matter

A PPA is a long-term agreement between an energy generator and an offtaker. For customers, PPAs help reduce exposure to market volatility, secure predictable energy pricing, and accelerate progress toward net-zero commitments.

With its robust solar and wind resources, Spain like much of Europe has become a leading market for renewable PPAs, supported by high corporate demand and a mature regulatory framework.

The PPA Process: From First Contact to Signature

At Zelestra, signing a PPA is a collaborative, multi-step journey:

• • • • ·Market Engagement: We tailor proposals to client needs, whether fixed-price or pay-as-produced structures.
      • ·Term Sheet Negotiation: A non-binding agreement defines volume, pricing, and commercial terms.
      • ·Due Diligence & Legal Drafting: Both sides align on technical, financial, and regulatory requirements.
      • ·Final Negotiation & Signing: Once risks are mitigated and terms finalized, the PPA is executed unlocking financing and construction.

Timelines & Key Challenges

Typical signing windows:

• • • • ·Utility PPAs: 3–6 months
      • ·Corporate PPAs: 6–12 months

Challenges often include price volatility, creditworthiness reviews, contract complexity, and regulatory uncertainty requiring consistent communication and flexibility from both sides.

What Drives Success

Through years of experience, we’ve learned that closing a PPA successfully requires:

• • • • ·Early engagement
      • ·Solution diversification
      • ·Data-driven transparency
      • ·Strong strategic alliances
      • ·Agility in a changing market

At the core of every successful deal is one principle: trust. PPAs are long-term commitments, and building mutual confidence from day one is essential.