STEAG GmbH owns a 26 percent share in the Arenales solar power plant. STEAG Energy Services Solar, a subsidiary of STEAG Energy Services, Germany, operates and maintains the first plant of this kind in SES‘s portfolio. As the O&M service provider in charge, SES Solar was present already during the long-term performance test phase, operating the plant on behalf of the owner and under the responsibility of the EPC contractor. From 2017 on SES Solar is fully responsible for the O&M services including management and procurement of spare parts. SI®/PAM (at SES developed cmms) supports the services.