A zero-emission battery powered 400Hz GPU. It is the ideal solution for remote aircraft positions and hangars where there is no access to fixed 400Hz infrastructure. The unit is offered with different battery capacity options to allow for different autonomies and turnaround times. It can be recharged from almost any 3-phase 50/60Hz supply and it can provide power to the aircraft while it is being recharged. The unit uses the well proven TLD iBS Lithium-Ion battery technology. Each iBS battery pack has a capacity of 22kWh making it an ideal solution for multiple GSE applications. The iBS battery packs can be reused as second life in other TLD GSE