ON.energy is setting the standard for large load interconnection. ON’s patented AI UPS™ is a medium-voltage UPS that serves as a firewall, protecting the data center from the grid, and the grid from the data center. With multiple gigawatts currently under construction, we are enabling grid-safe data centers.

ROLE OVERVIEW

The Testing Engineer will support the Test Lead in the design, technical sizing, integration, and execution of tests for Battery Energy Storage Systems (BESS) and Grid-Following/Grid-Forming (GFL/GFM) systems within ON.energy’s Research and Development area. The engineer will assist with product development, validation, and risk mitigation activities, collaborating in the planning and execution of validation cycles in the testing laboratory under the supervision of the Test Lead, to whom they will report directly.

The main objectives are to mitigate system architecture risks for ON.energy’s current and future product lines through rigorous laboratory stress testing, bridge the gap between laboratory results and real-world conditions, and support training,



troubleshooting, and customer engagement activities.

KEY RESPONSIBILITIES

Design, Sizing, and Integration
- Design and Sizing - Support the calculation and sizing of BESS systems (capacity, power, discharge rate, operating cycles, and efficiency) and GFL/GFM solutions according to project requirements.
- Component Selection - Support the selection and integration of appropriate components based on the application (peak shaving, power quality, HIL, dynamic test profiles, etc.), including batteries, BMS, inverters, protection devices, and cabling.
- Electrical Engineering - Assist in preparing single-line electrical diagrams, calculation reports, and bills of materials supporting each solution.

Test Planning
- Test Protocol Development - Design and document detailed testing procedures utilizing Hardware-in-the-Loop (HIL) laboratory assets to validate the performance of BESS and GFL/GFM systems

📌 Test Engineer, R&D (Villahermosa)
🏢 On.Energy
📍 Villahermosa