Senior Application Engineer

Senior Application Engineer LS Energy Solutions, a global provider of energy storage solutions is currently seeking a Senior Application Engineer. The Controls Engineer will deliver solutions that meet all product technical, quality, and reliability requirements. He/she will develop electrical and controls system design solutions based on engineering principles and provide automated production solutions for LS Energy Solutions Battery Energy Storage Systems (BESS).

The Senior Applications Engineer will be responsible for BESS & Grid-Tie Inverters sits at the intersection of technical design, commercial pre-sales, and site execution. This role acts as the technical subject matter expert (SME) bridging customers, sales teams, and core engineering to size, integrate, and deploy utility-scale or C&I energy storage solutions onto the electrical grid. Work Hours & Flexibility ·       40 Hours/week, full-time ·       Up to 20% travel to project sites ·       In person in the office Work Location ·       Charlotte, NC Job Responsibilities Execute functional, performance, thermal, and dynamic grid-support testing on utility-scale and C&I grid-tie inverters and Power Conversion Systems (PCS).

Hardware-in-the-Loop (HIL) testing and firmware validation to verify inverter control algorithms, fault ride-through capabilities, power quality (THD), and protection response. Develop test plans, setup test rigs, evaluate test data, and author validation reports for pre-commissioning and product design improvements. Certification & Compliance Support Lead technical preparation and on-site support for third-party listing certifications (UL 1741 SB, IEEE 1547.1, UL 9540/9540A, NFPA 855, and grid code compliance).

Interface directly with Nationally Recognized Testing Laboratories (NRTLs) like UL, CSA, or Intertek during factory and field compliance testing. Create and update compliance documentation, safety manuals, and regulatory test evidence packages required for market entry and utility interconnect approvals. Customer Application Support Serve as the dedicated primary technical point-of-contact for end customers, EPCs, developers, and utilities throughout the project lifecycle.

Troubleshoot complex field integration issues, inverter-to-grid instability, communication protocol failures (Modbus TCP, DNP3, CAN), and site-level EMS/SCADA handshakes. Deliver technical training to customer engineering teams and contractors on inverter installation, operation, safety protocols, and optimal performance parameters. Pre-Sales Engineering & System Design Design and configure BESS and PCS architectures—including battery racks, inverters, transformers, switchgear, and Balance of Plant (BOP)—based on customer RFPs.

Develop technical proposals, single-line diagrams (SLDs), equipment layouts, Bill of Materials (BOM), and Scope of Work (SOW) documents. Perform system sizing, augmentation modeling, degradation analysis, and energy throughput calculations. Education & Experience Bachelor’s or Master’s degree in Electrical Engineering, Power Electronics, or Power Systems. 5 years+ of experience in applications engineering, inverter testing, or commissioning for grid-tie energy storage or solar systems.

Highly Desired Experience with system design and validation; project engineering; product conceptual design Experience with Battery Energy Storage System design or other integrated AC/DC electrical system Knowledge & Skills Demonstrated expertise in energy storage controls, validation and verification, systems integration, and advanced controls Skilled in tools used to analyze and test ModbusTCP communication protocol (i.e.

Wireshark, and PC based ModbusTCP applications for client and server operation) Strong understanding of inverter operation and functionality Familiarity with DC/AC or DC/DC converter operation, Deep familiarity with bi-directional grid-tie inverter topologies oscilloscope/power analyzer data acquisition, grid compliance testing, and SCADA/EMS com