Correct, I was going to say the same thing (with better spelling). Fuel consumption verification is always done by weight. Also important to monitor voltage along with current as a change in voltage will change the actual kW load enough to skew the results.
For cost comparison, all in costs for a privately owned 1000kW fully automated prime power system with two 400kW and one 200kW units was 29.5 cents/kWh over 8 years including fuel and maintenance in a very remote location. The system ran different combinations of generators to keep load between 40- 80% most of the time.
The utility took over supply with their own generators and maintenance people and costs went up to near 40 cents to the end user.
Generally, traditional diesels are in peak efficiency in the 60-80% range however with full electronic engines the fuel consumption is nearly linear from about 20-90%. Below 20% parasitic load like direct drive cooling fans start to impact efficiency.
Also had an acquaintance in the Arctic (where Nat gas was available) who ran 4cyl ford gensets to power his house and ran the rad air under the house to supplement heat. He saved 1/2 - 2/3 on heating costs and his electricity cost was around 30 cents/kWh where the utility charges 59.5 /kwh so it was a huge saving for him. He ran them 2 years, replaced the head, ran another 2 years then replaced the entire unit and did this for many years that I knew him.
