Grid-Edge Electrical Engineer, Inverter Systems Integration

Mainspringenergy; Edison (CA); On-site; USD 120,000 - 170,000; Full time

Job summary

Mainspring Energy in California is seeking an electrical engineer to join the team responsible for the Linear Generator’s power delivery and grid integration. You will focus on system-level architecture and validation, working hands-on in the lab to qualify grid-interactive inverters and ensure robust performance in field deployments.

You will own testing, parameter tuning, and root-cause analysis across the product lifecycle, collaborating with mechanical, thermal, controls, test, and software

Qualifications

• Bachelor’s or Master’s degree in Electrical Engineering.
• 3+ years hands-on experience with power inverters or power conversion systems.
• Strong troubleshooting skills with AC power systems, including waveform analysis, fault behaviour, and system stability.
• Comfort working on high voltage systems (400-800 Vac, up to 1500Vdc) in lab and industrial field environments.
• Experience with industrial communication protocols (Modbus TCP/RTU, CANbus, SunSpec).
• Working knowledge of NEC (NFPA 70) grounding, conductor sizing, and overcurrent protection for power generation systems.
• Ability to work independently and own complex technical problems from initial identification through final resolution.
• Demonstrated experience in development, deployment, or optimization of grid-scale energy projects.
• Expertise in Protection & Control (P&C), including programming SEL or Basler relays and coordinating with utility engineers for grid interconnection.

Responsibilities

• Lead the selection, sizing, and configuration of industrial grid-interactive off-the-shelf (OTS) inverters.
• Lead troubleshooting and root cause analysis of complex hardware issues in field, lab, or testing of grid-forming and grid-following inverters and AC power systems.
• Configure and tune inverter parameters for stable operation across grid-forming and grid-following modes.
• Design system-level tests to validate grid-edge behaviors, including LVRT and frequency response.
• Analyze AC power waveforms, power quality, and fault behavior to diagnose system issues.
• Ensure system compliance with grid interconnection standards such as IEEE 1547, UL 1741, and local utility requirements.
• Perform critical design reviews and collaborate cross-functionally with mechanical, thermal, controls, test engineering and software engineers.

Skills

Power inverter expertise

Grid integration

System-level architecture

Root-cause analysis

Education

Bachelor's or Master's degree in Electrical Engineering

Tools

Modbus TCP/RTU

CANbus

SunSpec

Job description

Mainspring Energy in California is seeking an electrical engineer to join the team responsible for the Linear Generator’s power delivery and grid integration. You will focus on system-level architecture and validation, working hands-on in the lab to qualify grid-interactive inverters and ensure robust performance in field deployments.

You will own testing, parameter tuning, and root-cause analysis across the product lifecycle, collaborating with mechanical, thermal, controls, test, and software