For energy plan, the cheap I found in Victoria for low to medium house hold consumption is click energy - for both with and without solar panels. I think the same is applicable in other states as well, check for your post code and calculate.
I have attached the pic of savings over last 2 weeks and compared with other competitors(negative is credit). I have 6.6kw solar systems. With solar feedinTariff rates going low to 10.2 cents, this can be good choice. There is no end date mentioned for this offer as well. So, not sure for how long it works but for coming summer this would be a bargain.
If your house hold consumption is low to medium, it's worth checking and switching.
This is my first deal post. Please modify or delete if it's not appropriate.
Rates in Victoria(powercor):
Usage(flat rate): 26.4c per kWh
Usage(time of load - peak): 32.2c per KWh
Usage(time of load - off-peak): 20.1c per Kwh
Daily supply charge: 126.19c per day
FiT: 16 cents per kWh.
Without solar: 16% off on default rates.
Usage(flat rate): 22.176c per kWh
Usage(time of load - peak): 27.05c per KWh
Usage(time of load - off-peak): 16.88c per Kwh
Daily supply charge: 106c per day
All inclusive GST.