The fuel cell system power conversion device (HiGen-C Series, HiGen-V Series) of G-Philos is a grid-linked inverter linked with the power grid, by converting DC power from the fuel cell to AC power. Fuel cell stacks, which are the core elements that generally make up fuel cell systems, are becoming smaller and smaller, and the output voltage is also becoming lower and lower. The fuel cell inverter offered by G-Philos is manufactured to allow for highly efficient power conversion, even at low voltages of 10.2V.

The fuel cell inverters of G-Philos have varying designs to fit the input conditions that are required in various situations, depending on the type and capacity of the fuel cell stack, and the company applies a very precise and stable stack optimization control algorithm considering the life of fuel cell stacks. There are over 30 different models that are categorized into: home-use (600W ~ 3kW), building-use (5kW ~ 20kW), and generator-use (25kW ~ 500kW), according to the system's output capacity.