yes it is liquid cooled .These gens also come with perkins engines which are suppose to be great engines.How do you have your gen hooked up?Do you use a manual transfer switch or automatic transfer switch?I have read that an air cooled portable gen should be operated at 80% of its rated power.Is that true for diesel gens?
The diesel power plant specifications indicate maximum sustainable load. Diesels are made to take high loading for long periods. In addition, diesel engines used in power plants are capable of running at 3000 or more rpms under heavy loads. When you take that into consideration that the power plant is running at 1800 rpm, the engine itself is not particularly being taxed by running at near maximum load. I'd suspect that with a diesel powered unit, the generator/alternator would be where max sustained loading might be an issue due to heat.
Personally, I seldom run my generator over 50% rated load. Don't forget, mine is only powering a camp with very little high load demand unless running a water pump or large power tools. At approx. 2500 to 3000 watts average loading, my unit burns approx. one litre of diesel fuel per hour.
We're way off grid out there so, I don't need a transfer switch. I just run the line from the generator into a large circuit breaker in the garage where the generator is. Down at the camp I have a regular electrical panel with fuses, not breakers. Out in the bush, it's easier to find a fuse than it is a breaker.
