Recently we needed to change power company after they upped their rates massively.
We are at home during the day so it seemed like one of the Off-Peak plans should work for us. But boy, it gets complicated working out which is best, and the power comparison sites are useless. For us, they said the best offer was Genesis at 17c per kWh across the board - no peak/off-peak offer.
Unconvinced, I requested our power data for the last two years (everyone can ask their power company for it) and after some complex spreadsheeting worked out which was the best for us. The summary for us was that the best offer was Contact Energy's Good Weekend Plan at:
*** 16c per kWh PLUS 16 hours of free power 9am - 5pm on Weekends. ***
The daily charge was the lowest of the off-peak plans too at $2.175
They also had the lowest gas rates. For reference, we're in East Auckland, Standard Users, with piped gas but no broadband. The rates are excluding GST.
My recommendations after the exercise are:
1) Don't rely on the power comparison companies - they don't have Contact Energy and inferred it was because they're uncompetitive when the reverse was true.
2) Don't be fooled by the headline offer - do the math. Free hours sounds amazing until you check the paid rate - and how much can you do in those free hours anyway.
3) Don't base it on the maximum number of off-peak hours - factor in the rates. One of the plans I compared had 138 hours at an off-peak rate but the off-peak rate was 18c and the peak rates were over 20c.
I've published the comparison table in case it helps anyone: https://tinyurl.com/3rvf9z2s
And I absolutely have no association with Contact Energy other than just becoming a customer. The link below is not an affiliate link.
I believe a few other people may have shared a Friend-get-friend offer but I don't even have that. I think there are also some big credits if you swap your broadband - we haven't done that yet. Will think about it in a month or two.
I am curious if anyone has an Anytime plan with a rate lower than 16c excluding GST.
Did I jump to Contact Energy too soon?
UPDATE: My confirmation email from Contact changed the rate to 18c which I challenged. It seems that an issue with my gas ICP delayed the change over and meanwhile the rate increased from 16c to 18c. My account to getting changed to the rate I was offered.
18c plus 16 hours free at the weekend remains a good deal, although Electric Kiwi’s Powershifter and Genesis’ anytime rates were close for me.
New Learning: always check the rate they email you versus the rate they give you on the phone. I’m sooo angry.
Maybe it will be a switch to Electric Kiwi after all.

@JunoNZ - I've always had the same thoughts about comparison tools not taking into account the hourly usage (or someones willingness to change their habits) and so I've always had a quick and dirty google sheet that I could use to upload my current providers power usage and then enter the rates of my current and potential other providers to check the cost difference.
I've just had a go at making it a bit more user-friendly and automated.
https://docs.google.com/spreadsheets/d/15GvJ1f4y4JhB-oSedew-…
Its only a first attempt, and I'm not very good at sheets and coding so theres still a lot of improvements that could be made but happy for everyone to have a go and offer feedback.
Basically
- Click the link
- Save a copy to your own drive
- Follow the steps on the 'Savings' sheet that first comes up
- The data that is there already is a comparison of Contacts "Good Weekend" plan (Provider A) and Flicks "Off Peak" plan (Provider B) for my house in East Auckland
- Once you upload your usage and make changes to the hours/rates it should show you the total
Assuming I've done the maths etc right (big assumption, but I uploaded my usage from last month and compared it to my bill and it was only $0.41 difference, so must be pretty close) then I would pay $240.08 under Contact Good Weekend, but only $234.10 under Flick