STROMTANK S-4000 Pro-Power MK-II 

Technically, the S4000 Pro-Power MK-II occupies a special position 
because it marks the transition to the ultra-high-end range and thus also cuts a good figure in many recording studios. 
It is likewise a classic StromTank,
and now in its latest version also one with 16 LFP-batteries (48 Vdc system) and two inverters.
These inverters are responsible for limiting the power draw.
The maximum current of the DC/AC converter must be taken into account,
as well as the heat generated during conversion.

For more info's:
https://stromtank.com/s-4000-propower