柴油發電機的價錢

Supply and fix a 100kVA is about $24000 and 300kVA is about $35000. Of course, 1 set 300kVA is much much cheaper than 3 set 100kVA.

For installation of 300kVA generator, you could use a load spreader (a bigger base steel frameworks to spread the load to larger area. For example 2m x 5m generator, you need to make a steel framework with base area about (1.2 times) 2.4m x 6m to spread the generator weight. It is common practice.