I would check math and make sure it's 1 cent/KWH as that is very very cheap.  Make sure all taxes/fees are included in it.  But if you have 1 cent/KWH you should be able to mine with even a S7 for quite a long time.    You would not need the newest efficiency miner at that price.

But again make sure your math is correct.  Also check how much electricity you have as not sure if very limited amount.  But if you have a decent amount of electricity at that price, and can handle heat/sound you have a very good investment opportunity obviously.