Battery Storage Solutions Engineer

HappyGlobal Service; Fremont (CA); On-site; USD 90,000 - 130,000; Full time

Job summary

HappyGlobal Service in the United States seeks a Solution Engineer – Battery Energy Storage Systems to join its U.S. Solution Engineering team.

The role reports to the Director of Solution Engineering and focuses on developing safe, reliable, and commercially competitive BESS solutions for utility-scale projects. You will collaborate with customers, sales, product management and international teams, perform sizing, analysis, and engineering documentation, and support proposal development and

Qualifications

• Bachelor’s degree in Electrical Engineering, Power Systems Engineering, Energy Engineering, or related field.
• Two or more years of engineering experience in battery energy storage, renewable energy, electrical power systems.
• Basic understanding of electrical systems, including transformers, switchgear, power converters, protection systems, and single-line diagrams.
• Strong analytical, organizational, and problem-solving skills.
• Ability to prepare clear calculations, technical documents, presentations, and customer facing materials.
• Proficiency with Microsoft Excel, Word, and PowerPoint.
• Strong written and verbal communication skills.
• Ability to work on-site at the Manteno, Illinois facility and travel up to ~20%.

Responsibilities

• Support the development of technical solutions for utility-scale battery energy storage projects.
• Perform preliminary sizing of battery, PCS, MVT/HVT, auxiliary loads, and balance-of-plant.
• Review project requirements including power, energy, operating duration, ambient conditions, elevation, degradation, efficiency, and project life.
• Assist in selecting appropriate battery system configurations based on customer and project requirements.
• Prepare preliminary system configurations, equipment lists, single-line diagrams, GA Layout and technical documentation.
• Support evaluation of standalone energy storage, solar-plus-storage, wind-plus-storage, microgrid, and AIDC applications.
• Review customer RFQs, technical specs, and interconnection requirements.
• Assist with proposals, compliance matrices, equipment specs, assumptions, exclusions, and clarifications.
• Support sales during customer discussions and proposal development.
• Participate in customer meetings and present technical information under guidance.

Skills

Electrical engineering

Power systems

Battery energy storage

Analytical skills

Presentation skills

Communication skills

Education

Bachelor’s degree in Electrical Engineering, Power Systems Engineering, Energy Engineering, or related field

Tools

ETAP

PSCAD

PSS®E

PowerFactory

MATLAB

Python

AutoCAD

Excel

Job description

HappyGlobal Service in the United States seeks a Solution Engineer – Battery Energy Storage Systems to join its U.S. Solution Engineering team.

The role reports to the Director of Solution Engineering and focuses on developing safe, reliable, and commercially competitive BESS solutions for utility-scale projects. You will collaborate with customers, sales, product management and international teams, perform sizing, analysis, and engineering documentation, and support proposal development and