The game uses both watts and joules, as appropriate. Accumulator charge is shown in joules (for example).
In Helmod, the Base time defaults to 1s. However this can be changed. When the base time is something other than 1s, referring to Helmod's values in W would be incorrect.
Example:
- Add a new Helmod production line
- Add recipe
- From the Helmod tab, select Steam engine
- Change the block to Computing by factory
- Type 1 under the Steam engine and press Enter to confirm
- Change the base time to 1min
The block is outputting 54MJ per minute. This is the same as outputting 900kJ per second. AKA outputting 900kW.
If Helmod said that the block was outputting 54MW, this would be incorrect.
https://i.imgur.com/suXNqHw.png