Sorry for the duplicate. I try to research a similar issue before posting, but I didn't find the report you linked, thanks for the quick answer !

The rocket silo only consumes 258 kW instead of 4 MW without modules. Using modules also results in a very low consumption instead of what could be expected.
It must be a typo in the prototype file, but here is some screenshots in case it's something weird...
Second picture is with the Custom ...