Found this deal when doing a comparison in VIC and they seem to be the cheapest for me (switching from Globird).
$100 welcome credit terms & conditions
Apology, I am not sure when the deal will expire. Also reading the PDS there is an exit fee of $50 (but with $100 credit and $120 referral if you stay for 12 mths you will still be ahead). See below PDS:
4.8 Exit fee
(a) If this contract ends after the cooling-off period and you are on a contract with fixed rate tariffs, we may charge you, in which case you must pay us an exit fee of $50 for each energy type (i.e. electricity or gas) we supply under the contract.
(b) We will not charge you an exit fee if the contract ends:
(i) because you move out your premises but you immediately enter into a new contract with us at your new premises;
(ii) under clause 8.3(e); or
(iii) under clause 25.
Clause 8.3
8.3 Changes to charges
(a) If we have agreed to provide you a fixed rate tariff in your OVO Energy Plan we will not vary the tariffs and charges or introduce new tariffs and charges. Except (other than in Victoria) we may, to the extent permitted by energy laws, reflect any increase in our direct or indirect costs or to allow us to fully recover our direct or indirect costs relating to any one or more of the following:
(i) us purchasing energy for sale to you, including managing or minimising price risk;
(ii) other costs that we incur in order to sell energy to you at the premises, including in relation to networks, metering, energy market participation, our liability under environmental schemes, loss factors (if this contract is for the sale of electricity) and unaccounted gas (if this contract is for the sale of gas); or
(iii) the imposition of a new law, regulatory requirement or tax, a change to a law, regulatory requirement or tax, a change to the interpretation of a law or regulatory requirement or a change to the basis for imposing or calculating any tax.
(b) If we have agreed to provide you a variable rate tariff under your OVO Energy Plan, we may vary the tariffs and charges, or introduce new tariffs and charges, for any reason.
(c) We will give you notice of any variations to tariffs and charges that affect you as soon as practicable, and in any event no later than your next bill (unless a longer period is required under the energy laws).
(d) If we vary the tariffs and charges or introduce new tariffs and charges during a billing period, we will calculate your next bill based on the variations or new tariffs and charges on a pro rata basis from the date stated in the notice provided under clause 8.3(c).
(e) If we vary the tariffs and charges, or introduce new tariffs and charges in accordance with clauses 8.3(a), 8.3(a)(iii) or 8.3(b), and you notify us that you wish to end this contract within 20 business days after the date you receive our notice of variation, then:
(i) this contract will end; and
(ii) we will not charge any exit fee that would otherwise apply.
Clause 25 :
25. Retailer of last resort event
If we are no longer entitled by law to sell energy to you due to a Retailer of Last Resort (RoLR) event occurring in relation to us, we are required under the National Energy Retail Law and the Rules to provide relevant information (including your name, billing address and metering identifier) to the entity appointed as the relevant designated retailer for the RoLR event and this contract will come to an end. This contract will automatically end when your premises is transferred to that retailer and no exit fee will apply. We will also cancel any direct debit arrangement we have with you and notify you and your financial institution of the cancellation.
FYI the $120 referral credit is paid $10 per month. Something to keep in mind.