Inrush Current Inverter Test 2: 30kW Fox ESS Hybrid Inverter

In Part 1, we tested how the Fox ESS inverter handles extreme motor startup surges. In this second phase of our inrush current inverter test, we go further. This time, we simulate load shedding to see how the 30kW Fox ESS hybrid inverter performs during an EPS switchover while powering a live base load.

Testing Under Load Shedding Simulation

At MSPD Africa, we created a real-world test using a 3kW three-phase fan. This fan can spike up to 12kW during startup. Only one inverter was active for the test. The second was turned off completely. Meanwhile, the active inverter was supplying about 6kW of load, including an electric vehicle charger. We then simulated a load shedding event by switching off the main power feed.

The system had to instantly switch from grid power to EPS (emergency power supply) mode. The challenge? Maintain performance while already under load—without tripping or interruption.

Seamless 12ms EPS Transition

The switchover took just 12 milliseconds. That’s faster than most people can notice. Even the television connected to the system stayed on without any flicker. The inverter didn’t drop voltage or overload, even under that high inrush draw. This proved the 30kW Fox ESS hybrid inverter can handle both startup surges and real-time power transitions.

Why This Matters

In South Africa, load shedding, large appliances, and heavy equipment make inrush tolerance essential. These conditions often cause inverters to fail or reboot. This inrush current inverter test not only proves Fox ESS’s capacity to withstand startup surges, but also its ability to transition to EPS mode without failure or interruption—even while powering 6kW+ of base load.

For installers and businesses looking for a reliable hybrid inverter with exceptional performance, the 30kW Fox ESS is proving to be one of the best on the market.

🎥Watch the Video 📖Refer back to Part 1