The output of the KM2 converter is ideally meant to be connected to a 12V battery . It always needs a 10.5 to 15V at the output (to power the control system) and means to absorb the power generated by the TEG system. This can be a battery (with load to prevent over-charging if continuously operated for a significant period of time) or the combination of a 12V power supply (just a few 100mA) and a constant voltage electronic load.
The KM2 is intended for a “final” application in which TEGs are always operated at maximum power and the generated power is stored in a 12V battery.
An optional interface board, KMi, can be supplied to display operating input and output current/voltage/power.
Optional backplane motherboards are available to accept multiples of 4 KM2s, with total power ratings from 250W. They mount the KM2s flat and include a main microcontroller for I2C and USB communication, current sensing and optional display.
- Input voltage from 2 V to 30 V (open-circuit)
- High electrical efficiency up to 97% and 99% MPPT efficiency
- Interface to 12V lead acid battery (and optional charge management)
- Backplane or stand-alone mounting options
- PCB or screw terminals
- I2C communication support
- 63 W power rating (at 25C with no forced cooling)