I got my base up and running with unlimited power (more than I can ever use). I built my base under a mountain which helped. I use wind generators, 3 at a time connected to one of those switch cables, one on each face. If I added a 4th generator it seemed to cut the average power output down although that may have just been how the wind was working.
Anyway this switch drops power downwards which is were I run about 7 cables. Then I connect a MFE transformer which is set to output 50 units of power and that cable goes to a central hub to one face of a HV transformer. I do each face the same way for a total of 12 generators connected to HV with 4 MFE’s acting as buffers / energy storage. The HV power comes out of the top of the HV (and it hurts a lot to get zapped, be careful). I just run that over and then strait down into the mountain. If you use F3 you can see your X,Y,Z coordinates to help do this.
All this descends into my power-room which has two HV taps on the HV line. The 50 EU feeds are from the bottom. Which each split into two 25 EU feeds which once again go to a MFE each. Then these MFE’s split power out multiple times to power several devices each. I tune them so my power feeds out-put just the minimum power. For example I have 4 electric furnaces so the MFE splits the cable into two branches which in turn split twice. These furnaces each require 3 power or a total of 12 for 4 of them. So my MFE outputs 12 which splits to 6 and then splits again to 3. This way I am using only the minimum power needed. Another nice feature is that machines do not consume power if they are not in use. All those MFEs will bank the wasted energy for you.
Early on I built a bunch of solar plants and attached them to a chest. You can stack batteries in the plants and they will drop the charged ones in the chest. After you get like 4 or more of these things going, you will have all the charged batteries you need, especially if you sleep the night away.
I also made an auto-miner. They have limited uses and even with ‘free’ power they seem to require a lot of your time to check on them, move them, load more digging stuff or filler material for what they yield, although I have gotten quite a few diamonds from them. I do have a self-powered trick for them as well. They require 5 power to operate. You will need 5 solar generators, 1 switch cable, 2 normal cables, 1 chest, your miner and drilling tubes.
First select the site for the miner. Next to it place a pile of two high dirt. On top of this stack place your switch cable. Place 4 solar panels on the faces of the switch cable. Remove the dirt, place two cables under the switch cable. It should look like a tree. Then place the miner down next to the cable. It now has 4 of 5 power. Place the chest and place the 5th solar panel next to the miner for your 5th power. Now put in your drilling tubes and you have your self-powered auto-miner. No batteries needed.
It would be nice if the guy had an advanced miner that had a much larger radius (currently 2). Its free minerals but you will end up moving it a lot and not necessarily getting much of what you want.
If you are just starting out with this mod, the first few machines you want in order are the generator, the extractor (1 rubber per tree), the macerator, and then 4 solar collectors around a chest to charge those batteries.