Senior BESS Technical Sales Lead – Polish Speaker

KK Wind Solutions A/S; Poland; Hybrid; PLN 240,000 - 360,000; Full time

Job summary

KK Group is seeking a Senior Technical Sales Manager-BESS to drive growth in Poland and CEE. You will translate customer needs into technically compliant BESS solutions, lead RFQs, and coordinate with engineering, sales, and EPC partners.

The role blends technical sales, system sizing, and grid-connection compliance, requiring fluent Polish and strong English, and a track record in energy storage or power infrastructure.

Qualifications

• Degree in Electrical Engineering, Power Systems Engineering, or a related technical discipline.
• Proven experience in technical sales, application engineering, solution engineering, or pre-sales engineering within BESS, renewable energy, or electrical power infrastructure.
• Practical experience in BESS plant sizing and preliminary electrical system design, including MW/MWh calculations, PCS selection, and MV/HV system configuration.
• Strong understanding of Polish grid connection procedures, grid codes, and technical requirements applicable to BESS and renewable energy projects.
• Experience with Polish grid operators (TSO/DSOs), either directly or through grid connection and compliance activities.
• Solid knowledge of MV/HV electrical systems, grid connection architecture, protection concepts, and power system fundamentals.
• Ability to interpret customer technical specifications and translate them into optimized system configurations and technical proposals.
• Experience preparing technical documentation, specifications, and proposal packages for customers and EPC partners.
• Strong communication and stakeholder management skills, with the ability to explain complex technical solutions clearly.
• Fluent Polish and professional proficiency in English, both written and spoken.

Responsibilities

• Lead the technical aspects of customer RFQs, translating customer specifications into technically compliant and competitive BESS solutions.
• Prepare and coordinate technical bid packages, including system configurations, technical specifications, scope of supply, single-line diagrams, and interface definitions.
• Lead technical pre-engineering activities by translating customer requirements into clear system configurations, scope of supply, and interface definitions, ensuring alignment between solution design, cost targets, and delivery feasibility.
• Perform preliminary BESS plant-level sizing and configuration based on customer requirements, including power capacity (MW), energy capacity (MWh), storage duration, and operating profiles.

Skills

Technical sales

BESS sizing

Grid codes knowledge

Power systems

MV/HV systems

Proposal documentation

Stakeholder management

Polish language

English language

Education

Electrical Engineering or related

Tools

DIgSILENT PowerFactory

PSS/E

ETAP

Job description

KK Group is seeking a Senior Technical Sales Manager-BESS to drive growth in Poland and CEE. You will translate customer needs into technically compliant BESS solutions, lead RFQs, and coordinate with engineering, sales, and EPC partners.

The role blends technical sales, system sizing, and grid-connection compliance, requiring fluent Polish and strong English, and a track record in energy storage or power infrastructure.