Master Electrician - Battery Energy Storage Systems (BESS)

Critical Loop; United States; On-site; USD 110,000 - 170,000; Full time

Job summary

Critical Loop is seeking a Master Electrician with deep BESS expertise to lead electrical execution for field deployments. You will serve as the technical expert for installation, commissioning, troubleshooting, and service across the battery storage fleet.

This hands-on leadership role requires mentoring junior electricians, making field decisions, and partnering with engineering to solve complex problems. Travel up to 30% is expected.

Qualifications

• Master Electrician license or equivalent field leadership.
• 8+ years of electri­cal experience in industrial, utility, or commercial settings.
• 3+ years with utility-scale Battery Energy Storage Systems (BESS).
• Experience commissioning/servicing major storage platforms (Tesla Megapack, Fluence, Sungrow, Powin, Wärtsilä, BYD, etc.).
• Experience with 480V AC and 1000–1500V DC systems and MV equipment.
• Hands-on inverter installation/commissioning with major brands.
• Strong knowledge of BESS, BMS, phase rotation, multi-phase commissioning, arc flash, and DC hazards.
• LOTO/arcing testing and electrical safety procedures.
• Ability to read electrical schematics and one-line diagrams.
• Valid driver's license and ability to travel.

Responsibilities

• Lead electrical installation, commissioning, maintenance, and troubleshooting of utility-scale BESS.
• Perform FAT and continuity, impedance, phase rotation, and multi-phase testing.
• Oversee commissioning activities including energization, startup, and testing.
• Troubleshoot high-voltage AC/DC systems.
• Isolate, de-energize, and return BESS to service safely.
• Install/replace PCS/inverters, transformers, switchgear, and racks/modules.
• Interpret electrical drawings and commissioning procedures.
• Route and terminate large-diameter wire (2/0 to 500 MCM).
• Support root-cause analysis of electrical failures.
• Follow QA, torque, and inspection requirements; document results.
• Collaborate with Engineering to resolve field issues and improve reliability.
• Mentor junior technicians and electricians.
• Maintain NFPA 70E, OSHA, LOTO, and site safety standards.
• Travel up to 30% to customer sites for commissioning and service.

Skills

Master Electrician

Field leadership

BESS experience

8+ years electrical experience

Inverter installation

High voltage awareness

LOTO and NFPA 70E safety

Tools

Tesla Megapack

Inverter platforms (EG4, SMA, Sungrow, SolarEdge)

Job description

About Critical Loop

Critical Loop is shaping the next generation of energy systems by building the integrated edge grid of the future. Specializing in advanced energy management and battery control systems, Critical Loop empowers businesses and communities to seamlessly unite distributed energy resources for faster, more reliable, and affordable grid access. With deep expertise in grid modernization and a passion for creating resilient, responsive energy solutions, Critical Loop drives innovation at the intersection of technology and energy.

Position Summary

Critical Loop is looking for a Master Electrician with deep experience in utility-scale Battery Energy Storage Systems (BESS) to lead the electrical execution of our field deployments. This role will serve as the technical expert for installation, commissioning, troubleshooting, and service activities across our battery storage fleet. This is a hands-on leadership role. We're looking for someone who is just as comfortable troubleshooting a live system as they are mentoring junior electricians, making field decisions, and partnering with engineering to solve complex problems.

Responsibilities

• Lead electrical installation, commissioning, maintenance, and troubleshooting of utility-scale BESS systems.

• Perform factory acceptance testing (FAT) including continuity testing, joint impedance measurement, phase rotation verification, multi-phase commissioning, energization, and functional testing.

• Perform and oversee commissioning activities including phase rotation verification, multi-phase commissioning, energization and startup, functional testing, and point-to-point verification.

• Perform high-voltage AC/DC troubleshooting.

• Safely isolate, de-energize, verify zero energy, and return BESS systems to service.

• Install, replace, and troubleshoot PCS/inverters, combiners, transformers, switchgear, breakers, communication systems battery racks/modules, and communication systems.

• Interpret electrical drawings, one-line diagrams, wiring diagrams, and commissioning procedures.

• Routing and installation of high ampacity terminations ranging from 2/0 to 500 MCM wire

• Support root cause analysis of electrical failures.

• Working with documented work instructions, QA hold points, and torque/inspection requirements.

• Partner with Engineering to resolve field issues and improve product reliability.

• Mentor and develop junior field technicians and electricians.

• Maintain NFPA 70E, OSHA, LOTO, and all site safety requirements.

• Travel up to 30% to customer sites for commissioning, maintenance, and troubleshooting activities.

Required Qualifications

• Master Electrician license or equivalent Journeyman-level experience with demonstrated field leadership.

• 8+ years of industrial, utility, or commercial electrical experience.

• 3+ years of hands-on experience with utility-scale Battery Energy Storage Systems (BESS).

• Experience commissioning and servicing Tesla Megapack, Fluence, Sungrow, Powin, Wärtsilä, BYD, or similar utility-scale energy storage platforms.

• Experience working with 480V AC, 1000–1500V DC battery systems, and medium‑voltage electrical equipment.

• Hands‑on experience with inverter installation and commissioning — EG4, SMA, Sungrow, SolarEdge, or comparable platforms.

• Strong understanding of battery systems, including series and parallel configurations, battery management systems (BMS), phase rotation, multi‑phase commissioning, arc flash, and DC electrical hazards.

• Experience performing lockout/tagout (LOTO), live‑dead‑live verification, and electrical testing using multimeters, insulation resistance testers, and phase rotation meters.

• Ability to read and interpret electrical schematics, one‑line diagrams, wiring diagrams, and technical documentation.

• Valid driver’s license and ability to travel as needed.

Preferred Qualifications

• SCADA, Modbus, or BMS communications troubleshooting experience.

• Hands on experience with cable connections in transformers, panel boards, and inverters

• NETA certification.

• NFPA 70E certification.

• OSHA 30 certification.

• Forklift Certification

• Experience with utility interconnection and substation equipment.

• SCADA, PLC, or industrial controls experience.

• Previous experience in a startup or rapidly growing company environment.

Critical Loop is an equal opportunity employer. We're committed to building a diverse team and creating an inclusive workplace where everyone can thrive. All qualified applicants will receive consideration for employment without regard to race, color, religion, sex, sexual orientation, gender identity, national origin, disability, veteran status, or any other protected characteristic under applicable law.