Would love to know where people are getting electricity for 15c/kwhr or even 10c/kwhr, here in Adelaide I'm paying closer to 30c/kwhr and during peak usage (eg, hottest days during summer) it can be >50c/kwhr!
Yeah it's ridiculous how much it varies. In Seattle, WA my mother-in-law gets a discounted rate under $0.05 USD per KWH. They used over 6500 KWH last month since they have an electric heaters (not gas).
1000 miles to the south in Southern California I have Southern California Edison and their prices are pretty much the highest in the US. I'm usually at Tier 2/3 border so I pay either $0.29 or $0.35 per KWH using just 300 KWH on average. If I mine or even use AC a little bit I go to Tier 5 which costs $0.46 per KWH - this happens at just 500 KWH, so obviously my GPU farm isn't at home.
Leave it to California to stifle technology with their green BS. With all their mouthing off about clean solar the state produces much less power than WA state's hydroelectric capacity. That's why Dalkore is setting up an ASIC farm at $0.02/KWH - that's as close to free as it gets I imagine.