The Issue is the Power Pole Only has a Radius of 32 (Limit of Factorio), Being at the Bottom it Can't Reach Any Further than that, why the Largest Factory is 31x31.
Take you Cursor Over the Power Pole and see the Area that Lights Up.
I found a way of doing it but waiting for reply from MOD Author if he would include it in his MOD.
The Largest I could force it to was 60x60 using a single invisible pole in the middle to connect to the pole on the edge else the Power pole does not connect.
My changes is include in a zip file on the issue I logged with the Author on Github. (For Testing you can download the MOD from the link)