Overdrive payback chart

Could someone please tell me how accurate/useful this chart is:

https://zero-k.info/mediawiki/index.php?title=Overdrive#/media/File:Wiki_OD_chart.png

The numbers that the game is showing me seem a bit different, and I really-really don't want to dig through the code to find the exact formula to use.

The idea is to recreate the chart as a table for better readability, but I want to make sure the numbers are not totally wrong.

That chart is correct (it's simply metal cost of given building divided by its +E multiplied by the ratio) but remember it assumes a spherical cow in vacuum.

Ingame payback ETA tooltip assumes all your overdrive is coming from a giant single mex that doesn't exist, which is pessimistic but given that your grid isn't always perfect, energy income can fluctuate etc it seems to be fairly accurate in practice.

Spherical cow in a vacuum is a good description of theoretical overdrive stuff. I posted an economy riddle some years back to flex your marks on overdrive. http://zero-k.info/Forum/Thread/27154

I know when practically considering building additional energy to a pre-existing overdrive grid, you need to multiply your expected payback time by 2 for some reason. Think about how in real world progressive tax brackets, new income does not get taxed at your effective tax rate, but it gets taxed at your highest income bracket. Every unit of energy you add decreases the efficiency of all the existing units of energy that you already have.

I wrote that comment and named those variables. I haven't sat down and figured out whether the names make sense. At best you could say the equations are using a giant single mex that doesn't exist.

Thanks for all the replies (and for the subtle humor, too). I've updated the page and hopefully didn't mess up any numbers.