BESS Engineer

Jinko Power; Madrid; Presencial; EUR 50.000 - 70.000; Jornada completa

Descripción de la vacante

A leading energy solutions provider located in Madrid is seeking a Technical Owner for BESS systems. The role involves managing supplier evaluations, conducting performance analyses, and ensuring compliance with international standards. The ideal candidate has a Bachelor's degree in Electrical Engineering, 5–8 years of relevant experience, and strong communication skills in English and Spanish. This position offers an opportunity to work in a dynamic environment within the renewable energy sector.

Formación

• 5–8 years of experience in the renewable energy or power sector.
• At least 3 years dedicated to BESS engineering, procurement, or construction.
• Excellent written and verbal communication skills in English; Spanish preferred.

Responsabilidades

• Act as technical owner of BESS equipment analyses.
• Take full accountability for recommendations to management.
• Conduct BESS performance analyses and evaluations.

Conocimientos

BESS system architecture knowledge

Technical negotiation skills

Supplier evaluation expertise

Analytical mindset

Excellent communication skills

Educación

Bachelor’s degree in Electrical Engineering or related field

Herramientas

AutoCAD

MS Office

Python

Descripción del empleo

Main Responsibility

• Act as technical owner of all BESS equipment analyses during the phases of basic engineering, RFP preparation, supplier evaluation, and contract negotiation.
• Take full technical accountability for recommendations provided to management and procurement, ensuring traceability, justification, and alignment with project objectives.
• Lead technical and commercial evaluations of OEM (Original Equipment Manufacturer) proposals — including PCS, EMS, BMS, DC Blocks, transformers, and auxiliary systems — ensuring full compliance with Jinko Power standards and project requirements.
• Conduct BESS performance analyses, including round-trip efficiency, degradation modelling, DoD and C-rate impact, temperature control, and lifetime estimation under different operational strategies.
• Support Procurement in supplier comparison, scoring, and clarifications, providing clear, data-based recommendations on technical and performance trade-offs.
• Identify and flag potential technical, operational, or warranty risks in supplier proposals, ensuring mitigation measures are addressed before contract signature.
• Participate actively in technical negotiations and contract closure, ensuring that performance guarantees, testing protocols, and interface requirements are clearly defined and traceable.
• Maintain and strengthen relationships with OEMs (Huawei, Sungrow, BYD, CATL, EVE, Gotion, etc.), ensuring effective coordination, timely follow-up, and continuous technical communication throughout design, procurement, and construction.
• Ensure full awareness and application of international standards and regulations applicable to BESS and PCS equipment (IEC, IEEE, UL, NFPA, EN, etc.), including safety, grid compliance, and control logic requirements.
• Evaluate and review system control and communication architectures (BMS, EMS, SCADA, PPC), ensuring functional integration, data exchange integrity, and cybersecurity alignment.
• Review and validate engineering documentation (conceptual, basic, and detailed design), ensuring constructability and technical consistency.
• Coordinate closely with Construction during execution and commissioning, participating in FATs, SATs, and site tests to verify compliance and system performance.
• Prepare technical reports, comparative analyses, risk assessments, and design recommendations for management decision-making.

Requirements

• Bachelor’s degree in Electrical Engineering, Power Systems, or related field.
• 5–8 years of experience in the renewable energy or power sector, with at least 3 years dedicated to BESS engineering, procurement, or construction.
• Proven experience in basic engineering, RFP preparation, supplier evaluation, and technical contract negotiations for energy storage projects.
• Strong understanding of BESS system architecture, including PCS, EMS, BMS, transformers, and auxiliary systems.
• Demonstrated ability to compare and analyze OEM technologies, assess technical advantages, and support commercial discussions.
• Proven experience conducting or witnessing factory and site acceptance tests (FAT / SAT), commissioning, or early operational validation of BESS systems.
• Strong knowledge of communication and control systems (BMS, EMS, SCADA, PPC) and integration requirements.
• Solid understanding of international standards and regulatory frameworks for BESS and PCS (IEC, IEEE, UL, NFPA, EN).
• Excellent coordination and follow-up skills with equipment manufacturers to ensure on‑time delivery of technical information and proper interface alignment.
• Highly autonomous, proactive, and analytical, with ability to manage complex tasks independently and under pressure.
• Excellent written and verbal communication skills in English (Spanish preferred; Polish and Italian are a plus).
• Availability to travel within Europe for supplier meetings, factory testing, and site support.

Preferred Profile

• Direct experience with standalone BESS projects under construction or commissioning for IPPs or EPCs.
• Expertise in BESS performance validation, degradation tracking, and warranty analysis.
• Direct coordination experience with major OEMs (Huawei, Sungrow, BYD, CATL, EVE, Gotion).
• Ability to challenge OEMs technically when needed, maintaining a collaborative yet firm communication style to ensure robust design and performance guarantees.
• Strong ownership, structured work habits, and ability to communicate effectively across multidisciplinary teams.

Professional Skills

• Software: AutoCAD, MS Office, QGIS, PVcase (desirable), DIgSILENT, Python, or equivalent analytical tools.
• Soft skills: Ownership, initiative, analytical mindset, teamwork, assertive communication, and technical rigor.