Electrical Engineer, Energy Storage

Position Summary: 

The Electrical Engineer, Energy Storage designs and develops the system controller hardware that serves as the brain of Redwood's next-generation high-power electromechanical products — power converters that interface with battery packs, battery modules, photovoltaic (PV) systems, and the grid for large-scale energy storage applications, including AI data centers. This is a fully on-site role, based at 100 Hooper or LH 2. The engineer independently owns the low-voltage (LV) electrical system architecture, including system controller PCBA design, MCU selection and communication protocols, isolated sensing circuits, auxiliary power supplies, and protective circuits (breaker/contactor drivers, E-stop loops), devising solutions to new and unusual system-integration challenges from limited precedents. The role partners extensively with Mechanical, Firmware/Controls, Systems, Compliance, Supply Chain, Manufacturing, and Reliability teams to define requirements and take designs from concept through production. Success depends on sound engineering judgment, hands-on lab validation skills, and the ability to resolve ambiguous system-level trade-offs with limited direction. 

Essential Duties and Responsibilities 

• Own low-voltage (LV) electrical system architecture for power electronics products, including the system controller PCBA that coordinates parallel/series-connected power converter modules 
• Design and integrate system controller hardware, including MCU selection, communication protocols (CAN, Ethernet, etc.), and control logic for module synchronization, current-sharing, and startup/shutdown sequencing 
• Design isolated sensing circuits (current, voltage, temperature feedback) and auxiliary power supply architecture across LV subsystems (~100W) 
• Design and coordinate protective circuits (breaker/contactor drivers, hardware interlock/E-stop loops), ensuring insulation coordination and high-voltage safety compliance at the system level 
• Define LV wiring architecture, grounding, and interconnect strategy across the entire product and sub power modules 
• Lead electrical testing and validation for system controller PCBA and complete power electronics products, including power cycling, fault analysis, and performance characterization 
• Collaborate with cross-functional teams (Mechanical, Controls/Firmware, Validation, Supply Chain, Manufacturing, Reliability, Compliance) to define system requirements, test specifications, and achieve industry certifications (e.g., IEEE 1547, UL 1741) 

Skills, Knowledge, and Abilities  

• BS or MS in Electrical Engineering, with a focus on embedded systems, controls, or power electronics 
• 3–5 years of experience in electrical engineering, with a strong focus on system-level control architecture for power conversion or energy storage products 
• Hands-on experience designing MCU-based system controllers, including MCU selection, memory/peripheral budgeting, and system-level control for power converters 
• Experience with industrial communication protocols (CAN, Ethernet) for module-to-controller and controller-to-grid/BMS interfaces 
• Deep understanding of protection coordination (breaker/contactor drivers, hardware interlock and E-stop loops, fault detection and sequencing logic) and proficiency with circuit simulation/CAD tools (e.g., Altium Designer, LTspice, Simulink) 
• Demonstrated ability to lay out control PCBs in noise-sensitive, high-power environments, and proficiency with lab equipment (oscilloscopes, logic/protocol analyzers, signal generators) 
• Ability to travel up to 10% of the time