Understanding the Consumer Data Right (Open Banking for Energy)

The Consumer Data Right (CDR) is a new law that lets you tell your power company "hand my usage data to whoever I choose, securely, and do it now." New Zealand passed the Customer and Product Data Act in March 2025, and banking is the first sector to come online, with energy widely expected to follow. For solar households, the payoff is concrete: instead of waiting weeks for a wad of confusing data, you'll be able to share your real consumption history in seconds, so a retailer, an installer, or a comparison tool can tell you exactly what you'll save. It turns switching power companies from a chore into a few taps.

What the Consumer Data Right actually is

Strip away the jargon and the idea is simple. The data your power company holds about you, your half-hourly usage, your plan, your buy-back rate, is your data, not theirs. The Consumer Data Right gives you a legal right to direct that information to a trusted third party, safely and quickly.

You may already know this as open banking. That's the same machinery applied to your bank. The Customer and Product Data Act 2025, administered by the Ministry of Business, Innovation and Employment (MBIE), is the legal framework that makes it possible across multiple sectors. Banking goes first. Energy and telecommunications are the sectors most often named as next in line.

The key word is secure. Today, if you want a comparison site to crunch your numbers, you often end up emailing a PDF or, worse, handing over your login. Under the CDR, the data moves through a regulated, consented, encrypted channel. You approve exactly what gets shared, with whom, and for how long. Then you can switch it off.

Why this matters if you're thinking about solar

Here's the part the industry doesn't always spell out: good solar maths lives or dies on your real usage data.

The single biggest variable in whether solar pays off for your home is not the size of the system or the price per watt. It's self-consumption, the share of your generated power you use yourself instead of exporting to the grid. Why? Because every kilowatt-hour you use at home offsets the 30 to 40 cents you'd otherwise pay a retailer, while every kilowatt-hour you export typically earns a buy-back rate of only 7 to 17 cents, depending on the retailer (the Electricity Authority's Powerswitch service lists current plans and rates).

So two identical houses, same roof, same panels, can have wildly different payback periods purely because of when they use power. The retiree home that runs the dishwasher, heat pump and washing machine during the day captures far more value than the family that's out from 8 till 6 and only switches everything on after dark.

To model that properly, you need your actual half-hourly consumption, not an annual total. Right now, getting it is a faff. With the Consumer Data Right, it becomes a few taps. That's the quiet revolution here: accurate, honest solar advice gets dramatically easier to produce, because the data it depends on is finally yours to share.

The thing nobody tells you: your usage data is already there, you just can't easily reach it

This is the insight worth pausing on. Nearly every NZ home now has a smart meter. Stats from the Electricity Authority show the overwhelming majority of residential connections are metered with advanced (smart) meters that already record consumption in half-hour intervals.

That means a detailed, minute-by-minute picture of how your household uses power already exists. It's sitting with your metering provider and your retailer. The problem has never been that the data doesn't exist. The problem is that you've had no easy, standardised way to get it out and put it to work.

Today, to get your own half-hourly data, you usually have to:

• Phone or email your retailer and request a CSV export,
• Wait days or sometimes weeks,
• Receive a file in a format that varies by retailer and often needs decoding,
• Then hand it to whoever's doing your solar sums and hope they read it correctly.

The Consumer Data Right closes that gap. Instead of you being the courier, the data flows directly, with your consent, to the party you've chosen. No login sharing. No mystery spreadsheets. No three-week wait that kills your momentum.

How switching retailers works today, and how the CDR changes it

Switching power companies in New Zealand is already better than most countries. The Electricity Authority's Powerswitch comparison tool is free and independent, and a switch is meant to complete within a few business days. Stats from the Authority show hundreds of thousands of switches happen each year, and there's no exit fee on most plans.

But there's friction hiding in the experience. To get a genuinely accurate comparison, Powerswitch and similar tools ask for your usage. Most people don't have it handy, so they estimate, or they rely on a rough annual figure. Estimates are where money leaks out. A plan that looks cheapest on an average household profile can be the wrong choice for a solar home that exports heavily during the day.

Under the Consumer Data Right, comparison becomes data-driven by default:

• You authorise a comparison service to pull your real half-hourly usage and your current plan.
• It models every available plan against your actual pattern, including your solar export.
• You see your genuine best plan, then switch with a few taps, with the data handover happening securely in the background.

For a solar household, this is the difference between a guess and an answer. The right plan for a solar home is often not the cheapest headline rate, it's the one with the best combination of daytime usage rate and buy-back rate. Getting that right can be worth a few hundred dollars a year on its own. We dig into how buy-back rates change the maths over at our solar cost and ROI calculator, where you can play with the numbers for your own roof.

A worked example: same panels, different answer

Picture two homes, both with a 6.6kW system installed for around $11,000 to $14,000 (typical 2025 installed pricing per MBIE and installer data, roughly $1.70 to $2.10 per watt).

Home A is a retired couple in Rangiora on the Orion network. They're home most days. They've shifted the dishwasher, heat pump and laundry to midday. They self-consume around 55 to 60 percent of what they generate. Most of their solar is offsetting power they'd otherwise buy at full retail rates.

Home B is a working family in Hamilton on the WEL Networks area. Both adults commute, the kids are at school, and the house is empty from 8 till 5. They self-consume maybe 25 to 30 percent and export the rest at a modest buy-back rate.

Same hardware. Home A might see a payback in the seven to nine year range; Home B closer to eleven to thirteen years on the same plan. The gap is almost entirely behaviour and plan choice.

Now here's where the Consumer Data Right earns its keep. Home B's real usage data, shared securely, would let a comparison tool find them a high-buy-back plan (some retailers offer notably higher export rates), and an installer could correctly size a battery to capture the evening peak rather than over-spending on one that never fills. Without the real data, both of those decisions are educated guesses. With it, they're calculations.

Privacy: the part you should actually scrutinise

Any time someone says "share your data and life gets easier," your guard should go up. Good. Ours does too.

The Consumer Data Right is built on the opposite of a data free-for-all. It is consent-based and revocable. Under the framework MBIE is rolling out, you control:

• What data is shared (usage only, or plan details too),
• Who receives it (only accredited, regulated parties),
• How long they keep access, with the right to cut it off,
• And it all sits alongside your existing rights under the Privacy Act 2020, enforced by the Office of the Privacy Commissioner.

That accreditation point matters. The whole design is that data only flows to parties who've been vetted and held to standards. It's a world away from the current bad habit of emailing spreadsheets around or handing out passwords.

We take this seriously on our own side too. If you ever share information with us, we hold it to the standard set out in how we protect your data under the Privacy Act 2020. We never sell your details on. That's not marketing, it's a line we don't cross.

Where this is genuinely useful, and where it's oversold

Let's be straight about the limits, because that's how you tell honest advice from hype.

What the Consumer Data Right will genuinely do:

• Make switching retailers faster and based on your real numbers, not estimates.
• Make solar quotes more accurate, because installers can model your true usage.
• Help you spot a better buy-back plan you didn't know existed.
• Right-size a battery to your actual evening load instead of a sales rep's guess.

What it won't do:

• It won't make a bad solar system pencil out. A shaded, south-facing roof is still a shaded, south-facing roof.
• It won't lower your usage. Data tells you the truth, it doesn't change your behaviour for you.
• It won't zero your winter bill. No grid-tied solar system does that in a New Zealand winter, and anyone telling you otherwise is selling, not advising.
• It won't help much if you're a renter or planning to move within a couple of years, where the maths rarely favours buying a system anyway.

And one honest caveat on timing: energy is not the first sector live under the CDR. Banking leads. Energy is the expected follow-on, but the exact start date depends on MBIE's sector-by-sector rollout. So treat this as "the direction the country is heading and how to be ready," not "available at the wall plug tomorrow."

How to get ahead of it now

You don't have to wait for the law to fully switch on to benefit from the thinking behind it. Here's what to do today:

• Request your half-hourly usage from your retailer now. It's your data and they must provide it. Ask specifically for a 12-month half-hourly CSV export. That single file transforms the quality of any solar quote you get.
• Run your real numbers through Powerswitch (the Electricity Authority's free tool) before you assume you're on the best plan, especially if you already have solar.
• When you ask installers for a quote, hand them the real data. A quality installer will model your self-consumption properly. A rep who waves it away and quotes you a generic "you'll save X percent" is guessing, and that's a flag.
• Be precise about consent. Whenever you share data, ask who holds it, how long, and how to revoke it. The CDR is teaching the whole market this discipline; you can demand it now.

When it comes to choosing who actually does the work, real data only helps if the person reading it is straight with you. That's why we put every installer through our 13-step vetting process before we'll recommend them, and it's worth running any quote past our solar scam checklist so you know the tricks to watch for.

The bigger picture: power back in your hands

There's a reason we care about this beyond the solar maths. The Consumer Data Right shifts the balance of information toward the household. For years, the data that describes your own home has been locked up in systems you couldn't easily reach. Giving you the key is a quiet but real act of kaitiakitanga over your own resources: you can finally manage your energy with full sight of the facts.

For a country like Aotearoa, with high smart-meter coverage and an already-competitive retail market, the CDR is less a leap and more the missing piece. The meters are smart. The market is open. The only thing that's been hard is getting your own numbers into your own hands. That's the bit that's changing.

Frequently Asked Questions

What is the Consumer Data Right in plain English?

It's a legal right to direct the data a company holds about you, like your power usage, to another party you trust, securely and quickly. It's the same concept as open banking, applied across sectors. New Zealand's version is the Customer and Product Data Act 2025, administered by MBIE.

Is it available for energy right now?

Not yet across the board. Banking is the first sector being switched on under the framework. Energy is widely expected to follow, but the exact timing depends on MBIE's sector-by-sector rollout. The smart-meter infrastructure that makes it useful is already in most NZ homes.

Why does my usage data matter so much for solar?

Because the biggest driver of solar payback is self-consumption, how much of your own generation you use rather than export. Power you use yourself offsets the 30 to 40 cents you'd pay a retailer, while exports earn only 7 to 17 cents. Your half-hourly data shows exactly when you use power, which is the difference between an accurate quote and a guess.

Can I get my usage data today without the new law?

Yes. It's your data and your retailer must provide it. Ask for a 12-month half-hourly CSV export. It may take a few days and arrive in a clunky format, which is exactly the friction the Consumer Data Right is designed to remove.

Is my data safe under the Consumer Data Right?

The framework is consent-based and revocable, and data only flows to accredited, regulated parties. You control what's shared, with whom, and for how long, and your rights under the Privacy Act 2020 still apply. It's far safer than today's habit of emailing spreadsheets or sharing logins.

Will this help me switch power companies?

It will make switching faster and more accurate. Instead of estimating your usage, a comparison service can model every plan against your real consumption, including solar export, then handle the switch with a secure data handover. For solar homes, the best plan is often not the cheapest headline rate but the one with the right mix of daytime and buy-back rates.

Does the Consumer Data Right lower my power bill by itself?

No. It gives you better information; it doesn't change your usage or generate power. The savings come from acting on what the data shows, like moving to a better-suited plan or sizing a battery correctly. It won't zero a winter bill, and no grid-tied solar system does.

I'm renting or moving soon. Is any of this worth my time?

Switching retailers on better data is worth it for anyone. Buying solar usually isn't, if you're renting or likely to move within a couple of years, because the payback period outlasts your stay. The honest answer depends on your situation, and good data helps you see that clearly.

The bottom line: where to go from here

The short version: your energy data is already detailed, already recorded, and increasingly yours to put to work. As the Consumer Data Right reaches energy, switching retailers and getting honest solar numbers both get easier, because the maths can finally run on your real life instead of an average.

If you want to understand why we go on about honesty and data the way we do, it's all set out in our promise to New Zealand homeowners. And when you're ready to see real numbers for your own roof, the smartest first move is to pull your usage data and put it in front of installers who'll read it properly.