The generator has an integrated oil tank, which is installed on the generator, usually on the base. There is also a daily fuel tank, which typically provides 8 hours of use. This fuel tank is usually installed high up to facilitate the flow of oil to the generator. If you put it underground, you still have to solve the pump problem, which is complicated, but it's not as good as being elevated.
The fuel storage tank of the diesel generator cannot be placed outdoors.
The fuel of the diesel generator set should be placed in a separate room, and the installations inside the room should comply with fire protection regulations.
The location of using diesel generator sets is very flexible. Most users buy diesel generators inside and availabledare from a separate diesel generator room. However, some users have not prepared a diesel generator room in advance, so the diesel generator set can be placed outdoors, but the oil storage tank cannot.