Everything in the generator room that isn't the set itself: battery charger, fuel transfer, jacket heater, room ventilation and lighting.

Rating plate
DG Aux Panel
Most standby sets that fail to start fail on the battery. The charger and its healthy/fail alarm belong on the auxiliary panel, monitored, not on a plug top behind the set.
Interlock the louvres with the set. A generator started into a closed ventilation louvre pulls its own exhaust back through the radiator and trips on high water temperature within minutes.
The assembly is ours; the switchgear inside it is genuine, authorised-channel product from the makes you specify.
Built to the same standard, and able to share a lineup with this one.

Air handling · VFD · BMS

Lift supply · Fireman's return

Operator desk · Mimic
A drawing, a load list or a BOQ is enough to start. You'll get the ratings checked against the actual fault level, a general-arrangement drawing to approve, and a fixed price.