When setting up defenses with laser turrets I ended up frequently blowing up my power poles since their recharge easily goes past the limit in my network. I could split my defenses up into separate networks but usually I'd only expect a couple of laser turrets to be active at a time (wherever there is an attack) or use substations instead, but that only gives a slight improvment to the limit (the largest power poles doesn't have a good supply area).
So rather than those poor workaround I thought that perhaps transformers could have way to set their maximum throughput for them? Then I could set that to the maximum for my network and as long as I don't have any other power being input I'd be safe knowing nothing will blow up.