Presales Engineer
- Hiring from
- Vietnam
- Work type
- Remote
- Posted
- Sep 30, 2026
Position: Pre-Sales Engineer (Inverter & ESS) (Signed contract with PERSOL)
Working mode: Fully remote, with customer/site visits as required
Location: Ha Noi & Da Nang
Working time: 9:00 AM – 6:00 PM (Mon - Fri), 10 AM - 3 PM (Saturday)
Department: Sales / Business Development
Key Objective
The Pre-Sales Engineer will be responsible for supporting PERSOL clients' C&I business development in Vietnam by identifying and developing potential customers, working closely with EPC contractors and solar installers, providing technical solutions, and converting qualified opportunities into C&I partner agreements and sales projects.
Key Responsibilities
1.Technical Pre-Sales
- Provide technical support and consultation on PV inverters, ESS and C&I solar solutions.
- Analyze customer requirements and recommend suitable PERSOL clients' products and system configurations.
- Prepare technical proposals, system designs, layouts, specifications and technical reports.
- Support customers and EPC partners with system sizing, inverter selection, ESS configuration and solution design.
- Conduct technical presentations, product demonstrations and customer consultations.
- Support project bidding, tender submissions and proposal preparation.
- Ensure proposed solutions comply with applicable Vietnamese electrical codes, regulations and safety standards.
2. Business Development & Sales
- Identify, qualify and develop potential C&I customers, EPC contractors, solar installers, developers and other industry partners.
- Develop relationships with EPC companies and key industry stakeholders to generate new business opportunities.
- Understand customer requirements, decision-making processes and purchasing criteria.
- Support negotiations and commercial discussions to convert opportunities into sales contracts and C&I partner agreements.
- Follow up on sales opportunities from initial enquiry through proposal, negotiation and contract closing.
- Build and maintain long-term relationships with customers and strategic partners.
3.Market & Competitor Analysis
- Conduct market research on Vietnam's solar PV and energy storage market.
- Monitor market trends, customer requirements and regulatory developments.
- Track competitor products, pricing, technical solutions and market activities.
- Provide regular market and competitor feedback to management.
Job Requirements
Technical Skills
- Bachelor's degree in Electrical Engineering, Energy Engineering, Renewable Energy or a related field.
- Strong knowledge of solar PV systems, PV inverters and ESS.
- Good understanding of inverter design principles, MPPT technology and power conversion efficiency.
- Knowledge of C&I solar and energy storage applications.
- Knowledge of relevant electrical codes, standards and safety requirements.
- Ability to understand and use solar PV system design software.
- Ability to recommend appropriate inverter and ESS solutions based on customer and project requirements.
Sales & Business Development Skills
- Proven experience in technical sales, pre-sales engineering or B2B sales.
- Experience in the solar PV, inverter, ESS or renewable energy industry is preferred.
- Ability to identify and qualify potential customers and business opportunities.
- Strong communication, presentation and negotiation skills.
- Ability to explain technical concepts clearly to both technical and non-technical customers.
- Strong relationship-building and customer management skills.
- Self-motivated and able to work independently in a remote working environment.
Preferred / Advantageous
- Experience working with EPC contractors, solar installers or developers in Vietnam.
- Experience with C&I solar projects.
- Knowledge of competing inverter and ESS brands.
- Experience with solar monitoring and data analysis platforms.
- Existing network of EPC contractors, installers or C&I customers in Hanoi, Da Nang or surrounding regions.
- Good command of English is preferred.
Performance Expectations
- The successful candidate is expected to: Develop a strong pipeline of C&I opportunities.
- Establish and maintain relationships with EPC and installer partners.
- Generate qualified project opportunities.
- Support successful technical proposals and project tenders.
- Convert qualified opportunities into C&I partner agreements and sales.
- Contribute to revenue growth for PERSOL clients' Vietnam C&I business.
Package & Benefits
- Income: Competitive base salary based on capability, plus business travel allowances (transportation, accommodation, per diem), 13th salary.
- Commission: based on applicable sales/project value
- Training: Participate in in-depth training courses on the latest Inverter and BESS technologies from Deye's senior technical experts.
- Welfare: Full social insurance, health insurance, unemployment insurance, and paid leave/holiday bonuses as per regulations.
- Environment: Work in a professional, dynamic multinational energy technology environment with a clear career progression path to service management positions.
Apply & Contact
- Phone/Zalo: 0918196610 (Ms. Mai)
- Email: mai.xuanhuynh@persolapac.com