System Engineer II

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The Electrical System Engineer II plays a key role in the New Product Development (NPD) team, supporting the design, validation, and release of residential and commercial & industrial (C&I) energy storage systems (ESS). This role focuses on system‑level electrical design, documentation, component integration, and cross‑functional collaboration to bring next‑generation ESS products to market.

• Develop and maintain system‑level electrical schematics, wiring diagrams, and single‑line diagrams for residential and C&I ESS solutions.
• Own and manage the Bill of Materials (BOM) for the complete ESS system, including protective devices, wiring, enclosures, control circuitry, and interconnects.
• Design and review protection circuitry, grounding schemes, and safety interfaces in accordance with industry standards.
• Perform system‑level Failure Mode and Effects Analysis (FMEA) to identify risks and propose mitigations.

• Apply working knowledge of lithium‑ion batteries, battery management systems (BMS), and battery protection architectures.
• Understand grid‑connected bi‑directional inverter topologies, including AC/DC conversion, grid integration, and system efficiency impacts.
• Support communication architecture design using CANbus, Modbus RTU/TCP, IsoSPI, and other digital interfaces used within ESS products.

• Work closely with compliance teams to ensure designs meet relevant industry and safety standards, including UL 9540, UL 1741 SA/SB, UL 9540A, and UL 1973.
• Participate in certification testing, prepare documentation packages, and support issue resolution during the compliance process.

• Collaborate with battery and inverter suppliers to evaluate new technologies, review specifications, and support product integration.
• Coordinate with internal partners in Product Line Management (PLM), compliance, manufacturing, and production engineering to ensure smooth product development and launch.
• Provide technical guidance during design reviews, prototype builds, and engineering validation activities.

• Mentor junior engineers and interns in system design fundamentals, lab practices, test environments, and safety procedures.
• Support continuous improvement initiatives within the NPD and lab teams.

• Bachelor’s degree in Electrical Engineering or related discipline;
  Master’s preferred.
• 3+ years of experience in electrical system design, preferably in energy storage, power electronics, or renewable energy industries.
• Hands‑on experience with ESS components such as Li‑ion batteries, BMS, contractors, fuses, inverters, and communication hardware.
• Familiarity with UL standards relevant to ESS products.
• Strong analytical and problem‑solving skills with experience conducting FMEA and system troubleshooting.
• Effective communicator able to work in cross‑functional environments.

This position may require the ability to perform tasks that involve sitting, standing, walking, lifting, computer work and other physical activities. Candidates should be able to meet these physical demands with or without reasonable accommodations.

• Medical.
• Dental.
• Vision.
• Supplemental life.
• PTO.
• Company‑branded merchandise.
• Community events.
• Company‑funded continued education opportunities.
• Discounts and perks through locally owned businesses.

EG4 Electronics is an equal opportunity employer and administers all personnel practices without regard to race, color, religious creed, sex, gender, age, ancestry, national origin, mental or physical disability or medical condition, sexual orientation, gender identity or expression, marital status, military or veteran status, genetic information, or any other category protected under federal, state, or local law.

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