The Gravitas X75 from Critical Power Supplies is an ultra-compact, integrated DC power system.

The base system is a 1RU shelf holding up to three hot-swap
rectifier modules. This system produces up to 1958 watts output at -54.4, 27.2 or +13.6VDC. It can also be operated as a 21 redundant system with up to 1305 watts output. The expanded system consists of a base shelf plus an expander shelf with a 2RU total height. This system holds up to six rectifier modules with up to 3916 watts output; it can be operated as a 5+1 redundant system with up to 3264 watts output. Each rectifier module is cooled by a fan that operates at a speed which is a function of
load and temperature.

There are up to five circuit-breaker protected DC outputs or up to 10 GMT fuse protected outputs on the base system. A battery string breaker and a low-voltage battery disconnect are standard features. The expander shelf comes with a ribbon cable and connectors to link the signals between the two units at their rear panels. It also comes with bus bar links to parallel the rectifier
output bus bars.

The system can also be operated as a battery backup, single
feed power system (without load circuit breakers or fuses).