About us

We make sunlight

Our mission: Moving the solar industry forward by enabling the highest degree of measurement control & certainty through high-end solar testing advice, technology and services.

Company History

Eternalsun Spire-Temperature Control Lab Flasher(TCLF)
  • 2011

    • Eternal Sun is founded as a spin-off from Delft University of Technology in the Netherlands
  • 2014

    • We introduce the AAA+ class steady-state solar simulator
  • 2015

    • Our AAA steady-state simulator wins the first prize of PV magazine’s technology highlight awards
  • 2016

    • Eternal Sun acquires the solar simulator division of Spire Solar Corporation.
    • Develops the Climatic Chamber Solar Simulator and wins the first prize at PV magazine awards, technology highlights 2016
  • 2017

    • Eternal Sun & Spire Solar introduce the AAA High Performance Light Soaker for advanced LeTID studies
  • 2018

    • OdinSpire, a joint venture of Eternal Sun Spire and Odin Warehousing, starts local PV testing services in Rotterdam Harbor
    • We set up a sales and service office in Shanghai to be closer to our customers
  • 2019

    • Introducing the A+A+A+ Single Long Pulse Temperature Control Lab Flasher
    • ABN AMRO Energy Transition Fund joins as new majority shareholder
    • Eternal Sun & Spire Solar change the name to Eternalsun Spire combining the broad experience and innovative environment of both brands

Do you want to learn more? Contact us!

Eternalsun Spire is a leading manufacturer of solar simulators for measuring the performance of PV modules.

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