HEP-Proizvodnja d.o.o. (HEP Generation) has introduced and certified an integrated environmental, quality and energy management system, in accordance with international standards ISO 14001: 2015 , ISO 9001: 2015 and ISO 50001: 2018, which, with its 35 components, represents one of the largest environmental, quality and energy management systems in the Republic of Croatia. Effective environmental, quality and energy management is part of the business strategy of HEP Proizvodnja d.o.o. in the generation of electricity and heat and provision of ancillary services to the electric power system. Certification according to ISO 14001:2015, ISO 9001:2015 and ISO 50001:2018 was carried out and confirmed by the certification company TÜV Croatia d.o.o. As one of the largest production companies in Croatia, and in view of the industy it belongs and the number of people it employs, aware of its environmental impacts and considering the introduced environmental, quality and energy management systems, HEP-Proizvodnja d.o.o. also adopted the Environmental, Quality and Energy Management Policy, opting to achieve maximum operational readiness and reliability of generating capacities while implementing environmental protection measures and increasing the share of generated power and heat in the regional market. The Policy rests on the principles of environmentally friendly generation, energy efficiency and sustainable business operations.Hrvatska elektroprivreda d.d. became the holder of the certificate of integrated environmental, quality, energy, health and work safety system according to international standards ISO 9001:2015, ISO 14001:2015, ISO 50001:2018 and ISO 45001:2018. Simultaneously, HEP Upravljanje imovinom d.o.o. (HEP – Asset Management) was certified in the field of businesses forming an inseparable whole with HEP d.d., also to international standards ISO 9001:2015, ISO 14001:2015, ISO 50001:2018 and ISO 45001:2018. Along with other system documentation required by the standards, HEP d.d.’s Management Board adopted the umbrella document – Policy of quality, environment protection, energy, health and work safety management for HEP d.d. and HEP Upravljanje imovinom d.o.o. (PDF), which states the commitment to maintain and permanently improve the integrated management system. Within the certification process encompassing 85 days of workshops, the total of 87 employees were certified, among them 54 internal auditors and 33 lead auditors.
Certified green energy is generated in 26 hydro power plants owned by HEP, which account for more than a half of the generating capacity of the Croatian electric power system.
All HEP's hydro power plants are certified by the company TÜV SÜD for electricity generation from renewable sources - green energy.