Engineering Puerto Rico's Energy Future

Since 2009, ESS LLC has been at the forefront of Puerto Rico's energy transformation, delivering critical infrastructure solutions that power our island's most important facilities.

Our Story

Energy Storage Solutions (ESS) LLC was founded to bridge the gap between design and field implementation. We recognized that Puerto Rico needed more than just engineers or contractors—it needed a team that could seamlessly integrate both.

What began as a specialized solar contractor has evolved into a comprehensive technical services firm, offering integrated solutions that span the entire energy infrastructure ecosystem. Today, we're recognized as Puerto Rico's premier contractor for complex electrical, microgrid, and EV charging projects.

Our evolution reflects the changing needs of our clients and the island's energy landscape. We've expanded our capabilities while maintaining our core commitment to technical excellence and client success.

Our Mission

"To deliver innovative energy solutions by integrating advanced technologies to enhance efficiency, resilience, and sustainability."

Our Vision

"To become a leading provider of integrated energy and electrical solutions in Puerto Rico and beyond, recognized for our technical excellence, commitment to resilience, and ability to bridge innovation with real-world implementation."

By the Numbers

Years in Business15+
Projects Completed200+
MW of Energy Systems50+
Team Members40+
Client Retention Rate95%

Field-to-Design Integration

Our unique approach combines hands-on field experience with advanced engineering capabilities, ensuring practical solutions that perform reliably in real-world conditions.

Technical Excellence

We deliver engineering solutions that exceed industry standards and client expectations.

Field-Proven Expertise

Our designs are informed by decades of hands-on field experience in Puerto Rico.

Client Partnership

We work as an extension of your team, ensuring project success from concept to completion.

Local Commitment

Deeply rooted in Puerto Rico, we understand the unique challenges of our island infrastructure.

Leadership Team

Fernando Rivera, BSEE

President & CEO

BS Electrical Engineering

7 years engineering, 10 years construction

Rafael Nuñez, PE

Chief Technical Officer

Professional Engineer

20+ years electrical infrastructure

Christian Medina, PE, COR

Federal Contracts Manager

Professional Engineer, OSHA COR

Federal contracting specialist

Pedro Vega, BSCE

EV Infrastructure Director

BS Civil Engineering

EV specialist since 2019

Tania Ruiz, MBA

Chief Financial Officer

Master of Business Administration

Projects up to $10M

Certifications & Compliance

Licensed Electrical Contractor (PR)
Federal Contracting Registration
NAICS Codes: 238210, 237130, 541350, 541690
OSHA 30-Hour Construction Safety
ISNetworld Certified
Utility Interconnection Certified

Our certifications and registrations enable us to serve a wide range of clients, including federal agencies, municipalities, and Fortune 500 companies.

Verify Our Credentials