Planning a shoot off grid for a while, battery only but lots of setups.

I am wondering whether there is any data around what Low Power and Sleep consume in terms of draw from the batteries. I tried looking at the usage when in Low Power but it *seems* the same. Obviously Sleep would be less than Low Power but it would be awesome to have a handle on what the draw is in both cases for timing and planning?

This is an Epic-W

Any ideas?