Theta International GmbH is dedicated to providing integrated technology solutions and services for the new energy sector.

Headquartered in Rüsselsheim, Germany, within the Frankfurt Rhine-Main region, the company benefits from a strategic location just 15 km from Frankfurt Airport.

Since its establishment in 2021, Theta has focused on delivering specialized services for new energy applications, including installation, maintenance, software upgrades, battery repair, and power station O&M. Its service portfolio covers battery systems, photovoltaic systems, and related value-added support, helping customers improve operational performance and advance their sustainability goals.

Guided by the values of innovation, collaboration, and customer focus, Theta continuously explores new technologies, pursues operational excellence, and works to create long-term value for its customers.


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5+

years experience

239+

projects completed

230+

happy customers

4.8

overall rating

how it works

A Simple Guide to Our Process

We begin by assessing each client’s operational needs, including requirements for battery maintenance, photovoltaic system support, software upgrades, and related technical services.

Our technical team conducts an on-site assessment of the customer’s equipment and operating conditions, including battery systems, photovoltaic systems, and power stations, in order to develop a tailored service plan.

Based on the consultation and site assessment results, we develop customized service solutions covering installation, maintenance, battery repair, and power station O&M to support performance, reliability, and sustainability goals.

Our technical team implements the tailored service plan, providing installation, software upgrades, equipment repair, and other on-site support to help ensure the stable operation of new energy systems.

We provide long-term power station O&M and real-time monitoring services, track equipment performance, and carry out timely optimization and maintenance to support reliable operation and long-term customer value.

CONTACT US

Ready to get started?
Talk to us today

Our experts are ready to support you with integrated solutions and services for battery systems, photovoltaic systems, and power station O&M. Schedule a free, no-obligation consultation to discuss your operational needs and sustainability goals.

Our Team

Professional service

Serving clients from global industry leaders to specialized energy storage integrators, we provide end-to-end energy storage solutions.