I understand you worked on a co generation project. Has it been successful? I was looking into a 6.5KW engine to power a ten KW generator to run say 18 - 20 hr a day on veggie oil. The load would vary from 2 - 5 KW with the starting peaks of some motors from time to time. The total system would charge a battery bank and run the load on Battery power when the motor was down for maintenance. We have a 3 KW wind generator that will be put up some time next year.
I have found many web pages about different engines, they all look vary similar. So talking to someone who has been down the decision road before, I am looking for a little direction to a good source.