Terms and conditions:
Certainty gives you exactly that - certainty. You can be sure that in most cases energy rates won't increase during the term of this plan.
Lock in energy rates until 30 June 2019 and get rewarded with up to 24% discount. Certainty certainly sounds good to me. With this plan, you can get:
PPD 20% prompt payment discount when you pay on time
Dual Energy 2% discount if you are a DualEnergy™ customer
Email 1% discount when you receive bills and correspondence by email
Direct Debit 1% direct debit discount (excluding credit/debit cards)