ive been trying to figure out how to power it, only coal has worked from what ive tried. i tried putting it near a power cord but nothing happened

Hello, you need to place one or more E-locomotive-power provider, look likes accumulator.

Is there some sort of ratio between providers and locomotives/wagons? I just placed one, and it seems to work, but I don't want to find my trains stranded if I scale it up.

Each provider can provide 2MW(2000KW).That would be, for example 3 MK1(600KW) or 2 MK2(900KW) or 1 MK3(1200KW).

I cannot see the power provider icon in my crafting area. Where is it? Looks like accumulator? Cannot find it.

I assume you've already done the research? The power provider will be in the logistics tab.

Each provider can provide 2MW(2000KW).That would be, for example 3 MK1(600KW) or 2 MK2(900KW) or 1 MK3(1200KW).

Does this work at all? I have one power provider on my map, and I'm running at least 50 e-trains with that one provider.

Yup. Upgraded to mk3 locomotive, cargo and fluid wagons. I think that's all of them.
On logistics tab, row 7 are the 4 locomotive options, row 8 are 3 cargo wagon options and row 9 has the fluid wagon options.... there is no power provider icon I can see. If it is somewhere can I get really specific location?

I have tested it without problems.
https://prnt.sc/ldnoov
https://prnt.sc/ldnok2

Some of my trains 2xMk3+2W goes at 518km but others at 324km, im doing something wrong?
thanks, awesome mod