This seems like a really early prototype. For example, the Army has repeatedly mentioned a hybrid drivetrain yet this has a traditional diesel engine. I am guessing the turret is unmanned as it looks smaller, but it is also missing things like smoke launchers, APS and other attachments you normally see on US tanks.
So I think this is really just a prototype to test an auto-loader based three (?) man crew set-up with maybe some other features (you can see it has some sort of camera based vision system).
That SAPA transmission is what provides the integration with the hybrid power systems.
Here is the exact model:
Some details about many ongoing research into hybrid powerpack for combat viechles.
There is a detailed section of ACT1075
US army APD program includes ACT transmitter. APD is a
parallel hybrid. By parallel it means that the viechle is driven directly by ICE like classical powertrain. The electric "motor" G40 is a generator that provides electricity like before. This generator is "oversized" so it can provide
160kw driving power at low load which is defined by US army as "silent tactic mode". One can call parallel hybrid as 90% classic with 10% electric system.
In a serial hybrid, the ICE drives a full-sized generator which drives a full-sized drive motor. If the ICE is 1500hp, the
total power of drive motors can reach something like
1350hp (>1000kw) counting 10% loss from M-E-M conversion. A parallel hybrid would retain a higher efficiency at 1440hp (4% M-M loss). Parallel hybrid may (only may) also be smaller. But serial hybrid has the advantage of much higher torque in all load level thanks to the much powerful electric drive motors.
The electrical drive power is 160kw against 1000kw, a huge difference.