The dual bank 24 V DC power supplies can operate up to 20 Li-Ion charging units for efficient power usage. Color light display allows the user to identify any issues with the battery or the pre-charge test for proper battery QC. The panel is designed to be wall mounted with a 10-charge case option for smaller portable operations. Global Geophysical Services uses a custom trailer with the capacity to charge 300 to 350 batteries at one time.