I'm sure you guys are aware, but for information I changed over to IOG from OG as the Zappi is now supported, when changing over on line (which was dead simple) my outgoing rate stayed at the 8p rate ie Octopus Go Lite. However you can now change the outgoing to Outgoing Octopus Fixed (or Agile) and get your export rate increased to 15p.
So import from 23:30 to 05:30 at 7.5p and export at 15p....... what's not to like.

