Highers maintenances costs in the long run due to wear and tear of moving parts
high noise output
High pollution due to the use of fossil fuels
High operating costs due to the ever-increasing cost of diesel and relatively low efficiency
The inconvenience of refueling and storage
Fire hazard of diesel storage - requires installation away from the place of use.
It runs at the same speed of 3600 RPM, so you can expect similar noise even when less equipment is connected. Its cost is also high when the load requirements are low.
No compatibility with solar panels