My experience with Nova is that they provide very little usable info to the customer. Best I managed to get was a csv file with daily readings emailed to me for 3 months. Was going to cost to get any more than 3 per 12 months.
All of the above sounds like incompetence on Nova's part. I have been in numerous properties with smart meters, oftentimes inside the house, and never in all my years had to let a meter person in to read the meter manually. However, your meter may not be reporting (although still collecting half-hourly information). The Electricity Code also permits you to have 4 requests per 12-month period, not 3. They're not required to charge a fee to do so. In any case, all of the providers I have used (Meridian, Powershop, Electric Kiwi & Flick) all had an online portal where I could download the consumption information instantly, digitally & for free.
Another thing to remember is that at least some retailers who install "smart" meters won't allow other retailers access to the half-hour consumption data if the customer uses a different retailer.
I know this is true because the house I moved into a year ago has a TrustPower "smart" meter, but Genesis have to send a meter reader round every two months.
I understand (but not from personal experience) that Genesis won't share data from their meters with other retailers.
No. This just simply means that Genesis does not want to pay whatever TrustPower are charging to use their meter half-hourly. There is nothing preventing them from doing this, except the commercial decision (as far as I am aware).
Maybe I ought to discuss this with the Commerce Commission
You really need to be discussing that with the Electricity Authority.
I just can't understand why we don't have those in NZ. Normally NZ is ahead of the UK when it comes to this sort of thing. Even the apps that companies like Electric kiwi provide, are delayed by a day.
There is a reconciliation process that goes on in the MEP (Metering Equipment Providers) data warehouse which usually runs overnight, hence the one day delay. I have noticed some retailers also introduce a further delay (presumably for a similar reason). As a retailer, you can ask your MEP to receive the data more often but the cost is considerably higher due to the ad-hoc nature (e.g. increased messaging transmission costs). There is also the ability to install a consumer-accessible radio in the most common smart meters, however again this comes back to cost. As far as I am aware there is no mass market offering of this (Genesis offers a clamp solution, but this is not done using the meter itself).