Can you disable the power cost?

Yes. You can set the power cost to 0 in the mod settings. This will effectively disable the power requirement for the loaders.

Will you support [X Mod]?

Maybe. If you’d like me to support a specific mod, please post a request in the mod's discussion section. Include the name of the mod and a recommendation for the recipe adjustments.

Why do the loaders say they take 1.2 MW to run?

This is based on how Factorio calculates power usage for the loader entities. From testing, it seems the game assumes the loader will consistently unload 120 items per second (or 2 items per tick, one for each lane). This is likely why the max power cost appears higher than it will be.