From their website
http://www.peta-mine.co/cryptx-buys-datacenter/September 9, 2013 Brussels CryptX, a company which specializes in Bitcoin mining, is pleased to announce the purchase of its own datacenter.
The datacenter has an initial power capacity to host 300 TH/s of Bitcoin mining equipment. The capacity can be expanded if necessary. The electricity costs can be kept at a minimum due to our on-site solar plant of 350,000 Watt. The first deployment of 20 TH/s at the end of September has a monthly total cost, including electricity, maintenance and hosting, of maximum 5,000$.
The purchase of the datacenter is the second milestone in the development of the PETA-MINE. This enables CryptX to run the mine very cost efficient.
I have looked at their spreadsheet and find it lacking. For one its based on 10day increments when they will be paying weekly. Second, their increase in network hashrate is fixed instead of an average %. I could go on.
According to their website, (see above) they have capacity for solar power, so maybe that .45 for electricity is outdated, or accounts for paying off the install of the solar panels.
Large electricity users in EU can get easily down around 0.1$/kwh.