Currently Wind Mills are the endgame power generators: they cost only 6 iron ore and 2 tin ore (plus some other stuff you usually have plenty off) and produce 3.33 EU/t if placed at the correct height at zero cost beside the initial cable line and HV transformer. Compared to a nuclear power plant, you need about 21 wind mills to generate the same output as a Mk I reactor, but once you have them, you will never have to pay any kind of cost to keep them running, in contrast to the reactor which requires a constant supply of uranium.
While I like wind mills in general, I think the average output is too high. But instead of lowering them in general I think just lowering the effective EU at which they have a chance to break down to 1.5 EU would bring them in line with the other generators. This would have a safe wind mill produce about 1 EU on average, which feels right compared to solar/water generators, but still give you the option to have them produce more. But if you do, you need to repair them every now and then which effectively gives them a resource they "consume" to generate power beyond that point.
