If we have a fast inserter running flat out chest-to-chest, and replace it by a stack inserter moving items at the same rate, the energy consumption (ignoring drain) drops from 46kW to 33kW. But the stack inserter costs 90 resources to make, and the fast inserter only 12.5. Even using solar, 13kW o...

@OP : I'm not surprised in the slightest manner with your conclusions. Eyeballing consumption and speed, it seemed to me obvious. The only things eyeballing said nothing is the item per minute threashold a burner inserter gets more efficient than a regular inserter, and the stack bonus research at ...

So, a reply to a comment I made on a youtube video prompted me to break out the spreadsheets... The question is, what's the most energy efficient way to use inserters? In other words, how do we maximize items per second per kW? Well, I crunched numbers and found some interesting things. First, my ba...