Eternalsun Spire

Eternalsun Spire is a leading manufacturer of solar simulators and integrated climate chambers for measuring the performance and reliability of PV modules. We enable solar labs and PV manufacturers to accurately measure the performance and reliability of all PV module technologies and sizes. 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. We help our customers to achieve the highest degree of measurement certainty and getting the highest return from their solar investments. Our test setups address the specific needs of technologies like PERC, IBC, HJT, Perovskite, CdTe and are fully capable of handling of bifacial, half-cut cell, shingled and large modules.