Hello shanemadden,
As much I like your mod to simplify electricity on longer distances without poles I have to say that is too OP. It's too cheap for the amount of MJ it gives. Why would I use batteries in my base when I can spam Accumulator wagons everywhere? Much less space, much more storage and cheap.

Make the wagon cost of 100 batteries instead of 10 at least.

I agree. The wagons are far superior to stationary accumulators. With this mod, I can just replace all the accumulators in my base with trains that never move and save a bunch of resources.
Adjusting the recipe would fix that.

or make the recipe adjustable if possible, for those who want it more balanced an others that like the cheapness an just wont abuse it

I happened upon this same concern so I did just this and published it, for anyone who wants to use this mod without going into the code.
New version with settings:
https://mods.factorio.com/mod/accumulator-wagon-redux