To change the site energy cost (i.e. the cost of buying electricity from your electricity company) from the default £0.35:

• log in to the Fuuse portal
• click "Network" on the left hand side menu
• click "Charging Sites"
• click "See details" next to the applicable charging site
• click "Edit charging site" on the top right
• click "Site Energy" on the menu bar
• edit the site energy cost