About the role

We are seeking for

Technical Sales Support Manager

to join our Solar & Energy Solutions business. This role is responsible for providing technical expertise and pre-sales support across our portfolio of

Solar PV systems, inverters, battery energy storage systems (BESS), EV charging solutions, and other distributed energy products.

Working closely with Sales, Product Management, Engineering and Marketing teams, you will play a key role in delivering technical solutions that support business growth, enhance customer confidence, and ensure excellent after-sales support.

Job Description

Provide technical consultation and pre-sales support for Solar PV, Battery Energy Storage Systems (BESS), EV Chargers, Inverters and other renewable energy products.

Support the sales team by recommending suitable technical solutions based on customer requirements.

Prepare technical proposals, product specifications, datasheets, manuals, presentations and other supporting documents.

Review and maintain product technical information to ensure accuracy and up-to-date knowledge.

Conduct product demonstrations, technical presentations and installation training for customers, distributors and internal teams.

Develop technical training materials, user guides and knowledge base documentation.

Coordinate with engineering, procurement and operations teams to ensure customer requirements can be delivered efficiently.

Investigate and resolve technical issues together with manufacturers and internal stakeholders.

Collect market feedback and product improvement recommendations to support product management and business development.

Build strong relationships with customers, EPC contractors, installers and business partners by providing timely technical support.

Support new product launches and technical marketing activities.

Maintain accurate technical documentation and project records.

Qualifications

Bachelor's degree or higher in Electrical Engineering, Renewable Energy Engineering or a related field.

Minimum 5 years of experience in Technical Sales Support, Pre-Sales Engineering, Sales Engineering or Technical Service within the Solar, Renewable Energy or Electrical industry.

Strong knowledge of Solar PV systems, Inverters, Battery Energy Storage Systems (BESS), EV Charging solutions or related electrical equipment.

Experience in system design, technical proposal preparation and customer technical consultation.

Experience conducting technical training and product demonstrations.

Excellent presentation, communication and interpersonal skills.

Strong analytical and problem-solving abilities.

Able to work independently and manage multiple projects simultaneously.

Proficient in Microsoft Office applications.

Good command of English, both written and spoken.

Preferred qualifications:

Knowledge of PVsyst, AutoCAD or other solar design software.

Experience working with international solar equipment manufacturers.

Understanding of electrical standards, IEC and local regulations.

Why Join Gunkul Engineering?

At Gunkul Engineering, you will have the opportunity to work with one of Thailand's leading renewable energy companies, delivering innovative Solar PV, Battery Energy Storage, EV Charging and Energy Solutions. We offer competitive compensation, continuous professional development, and the opportunity to collaborate with industry experts on cutting-edge energy technologies.