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Position, Location, Department
Full-time | Madrid, Spain | Technical Europe
Position Summary
The Technical Presales Manager BESS is responsible for providing technical pre‑sales support for energy storage system solutions across the region. The role supports Sales teams by delivering technical expertise, solution design, bid support, and customer‑facing presentations for utility‑scale and C&I; BESS projects.
In addition, the role contributes to product management activities by supporting product certifications, monitoring market and technology developments, and ensuring technical compatibility of energy storage solutions within the European market environment.
Reporting Line
Reports to the Head of Technical Europe
Major Responsibilities

Provide technical pre‑sales support for BESS products, including customer communication, technical clarification, and solution presentations in collaboration with Sales
Design and configure BESS solutions, including product selection, system sizing, technical preparation, yield simulations, and cost‑related inputs for quotations
Participate in tender and bidding processes; prepare and review technical bid documents
Support technical contract negotiations and drafting of technical specifications and technical agreements for BESS projects
Provide daily technical support to customers and internal Sales teams on BESS product and system‑related topics
Support technical evaluations of customer requirements, grid standards, and project feasibility
Act as a technical interface between Sales, HQ technical teams, and customers to ensure accurate and timely technical communication
Deliver internal and external technical training sessions for BESS products and solutions, including system simulations and technical presentations
Represent the company in technical meetings, customer discussions, and project‑related communications as required
Perform additional technical tasks or project support as assigned by leadership

Product Management

Support product certification activities in relevant European markets,



including coordination of technical documentation and compliance requirements
Monitor customer requirements, market developments, and technology trends related to energy storage systems and provide structured feedback to product management and leadership
Collaborate with component manufacturers and internal teams to ensure compatibility of ESS systems with external components and system interfaces
Maintain awareness of competitor products, product roadmaps, and technical developments to support product positioning and technical decision‑making
Represent the company in technical product presentations, webinars, trade shows, and industry events as required
Support the continuous improvement of technical documentation, solution templates, and product‑related processes

Performance Indicators

Bid win support rate / technical contribution to successful tenders
Turnaround time for technical proposals and configurations
Number and quality of technical trainings delivered
Reduction in technical clarification cycles or bid revisions
Technical accuracy and compliance of system configurations and documentation
Stakeholder feedback from Sales and customers
Customer satisfaction with technical support and solution quality

Required Qualifications

Bachelor’s degree or above in Electrical Engineering, Energy Engineering, Physics, Power Systems, or a related technical field
Minimum 5 years of experience in the PV and/or energy storage industry
Proven experience in BESS technical support, system design, or pre‑sales engineering
Strong understanding of energy storage systems, grid requirements, and customer technical expectations
Experience supporting utility-scale or commercial energy storage projects is strongly preferred




Fluency in English and Spanish (C1: professional working proficiency) is required
Strong technical expertise in energy storage systems and solution design
Ability to translate customer requirements into practical technical solutions
Excellent communication and presentation skills, including delivery of technical trainings and customer presentations
Structured, detail‑oriented, and solution‑focused working style
Strong cross‑functional collaboration and stakeholder management skills
Ability to work independently and manage multiple priorities in a dynamic project environment
Good understanding of system integration and technical compatibility requirements

Travel Requirement

Regular travel across the region as required
Occasional travel within Europe
Availability for customer site visits, technical trainings, and industry events

About JA Solar
JA Solar was founded in 2005 and is a leading global manufacturer of high-performance photovoltaic products. With 14 production sites, more than 20 subsidiaries and over 37,000 employees worldwide, JA Solar is one of the world's largest solar module manufacturers. The company's business includes module, wafer and cell production as well as the construction of solar power plants.
JA Solar is listed on the Shenzhen Stock Exchange in China and has been included in the Fortune China 500 and General Top 500 New Energy Enterprises for several consecutive years.
JA Solar is an equal opportunity employer and we encourage applications from all qualified individuals.
By submitting your application, you declare that your application data will be saved at JA Solar GmbH, and only for internal purposes in the context of the upcoming application process. If there is no employment, the data will be deleted after six months. The application data are treated confidentially in accordance with the provisions of the Federal Data Protection Act and are not passed on to third parties. You can revoke your consent at any time, either by email or in writing by mail to the company address.
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📌 Technical Presales Manager BESS – Spain/Portugal (d/f/m) (Madrid)
🏢 JA Europe
📍 Madrid