energyclubnz is offering a $100 credit for new signups until April 28 with code CLEVERBUNNY100. This is double the $50 offer they usually have on. You need to be a customer with them for 6 months otherwise they may reverse the credit as per the T&Cs.
Compare with other providers like ElectricKiwi and Powershop to see if the deals works best for you, at least for 6 months.
T&Cs:
*Offer terms & conditions: Joining credit is not valid in conjunction with any other offer and is not redeemable for cash. Offer valid until 28/04/2019. This offer is only valid for first time customers. If you cease to be an energyclubnz customer within 6 months of signup energyclubnz has the right to reverse the value of the joining credit and add it to your final bill.
via today's newspaper
Energy club is very very misleading. They charge $5 a week on top of the daily rates + the daily usage. The $5 a week 'club deal' made it more expensive than my provider Ecotricity