Powertrain manufacturer TM4 has developed a compact bidirectional charger that provides battery charging functionality as well as auxiliary power supply during vehicle operation – using the same power electronic modules to supply a configurable voltage and frequency output to auxiliary devices (writes Lawrence Butcher).

In charger mode, the TM4 BCI20 converts AC to DC to charge the electric vehicle’s battery. When a vehicle is in use, the unit becomes a dual inverter, converting stored onboard energy from the EV’s battery to AC power.

It has two independent three-phase outputs of 9 kVA