Meridian Energy Review

Meridian Energy Review

Meridian is New Zealand's largest renewable generator, and its retail business leans hard on that fact. The pitch is straightforward — buy your electricity from the company whose dams and wind farms produced it. What the marketing doesn't spell out is where the electrons in your socket actually come from, and Meridian deserves credit for being unusually clear about it.

Its own power stations page states it plainly. Meridian only generates from renewable sources, but the electricity it supplies to customers comes from the grid, which mixes renewable and non-renewable generation. That is not a mark against Meridian — every retailer here works the same way. It matters if you are choosing a power company specifically so your money only funds renewable generation.

What Meridian Actually Owns

Behind the brand sit seven hydro stations and eight wind farms, and no fossil fuel generation at all. Hydro does the heavy lifting. Meridian owns six stations in the Waitaki scheme — Aviemore, Benmore, Waitaki and Ōhau A, B and C — plus Manapōuri in Fiordland, the largest hydro station in the country.

Manapōuri is the one worth knowing about. It sits underground in Fiordland National Park, its generating units housed in a cavern cut from rock 200 metres below the surface of Lake Manapōuri. Resource consent conditions cap its output at 800 megawatts, enough for about 619,000 average homes.

The Waitaki scheme produces around 16 per cent of New Zealand's electricity and holds more than half the country's average hydro storage. That storage is the quiet advantage — wind and solar only generate when the weather cooperates, so a hydro scheme with large lakes behind it can be switched on when the grid needs it most.

Meridian also runs eight wind farms, and has committed to seven new large-scale renewable developments by 2030.

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How We Researched This Guide

We started with Meridian's own plan pages and took the buy-back rates, the terms and the credit offers straight from them, then went looking for the pricing structure underneath. That turned out to be the interesting part. Meridian does not publish a national rate card, because rates are set per address — the network you sit on and your meter configuration change what you pay.

For the regulated side we went to the source rather than the summaries. The Low Fixed Charge regulations are set out in full on legislation.govt.nz, and MBIE publishes the phase-out table alongside them. That is where we found something most summaries get wrong: the $1.80 daily cap is widely quoted as GST-inclusive, and the regulations say excluding GST. We would rather leave a number out than repeat one we cannot stand behind.

The Quick Summary (60-Second Version)

Six things worth knowing before you read the rest.

• Meridian generates 100% renewable electricity, but the power you buy arrives via the national grid, which is a mix.
• Hydro carries the load — seven stations, including Manapōuri, the largest in New Zealand.
• Meridian sets rates per address, so there is no national price to compare against.
• Open-term plans pay 15c/kWh for solar exports, rising to 24c/kWh during winter peaks.
• Fixed-term plans pay a lower 12c/kWh buy-back rate.
• The regulated Low User daily cap is $1.80 excluding GST, and the regulation ends on 1 April 2027.

Meridian's Plans, and What Each One Is For

Meridian runs three residential plans, and they suit genuinely different households. Choosing between them comes down to when you use power rather than how you feel about renewables.

Night Saver is the plan most people ask about, because it is the one built around electric vehicles. Meridian charges less between 9pm and 7am than during the day on that plan, which lines up with when most EV owners charge anyway. The same logic applies if your household already runs the washing machine and dishwasher overnight. If almost everything you do happens during the day, Night Saver is the wrong shape for you.

The Bach Plan is a different animal: a two-year fixed term with no daily charges, aimed at holiday homes where a standing charge would be dead money. It carries the lower 12c/kWh buy-back rate, which is the trade-off for fixing the term. Freedom is the default — no fixed term, no exit penalty, and depending on your meter you may be able to get day and night rates on it too.

Both open-term plans include a $10 monthly credit for the first twelve months, subject to eligibility criteria.

Why Two Houses on the Same Street Pay Different Rates

This is the part that frustrates people comparing power companies. Meridian sets its usage and network rates per address, so your neighbour's per-kilowatt-hour rate can differ from yours because you sit on different parts of the network, or simply have different meters.

On top of that sits the choice between Low User and Standard User. Low User suits households using under 8,000 kWh a year. In the lower South Island — Christchurch and below, excluding the West Coast — the threshold is 9,000 kWh. Low User means a low daily fixed charge and a higher rate per unit. Standard User flips that.

The Low User option is being phased out. The maximum daily fixed charge has climbed 30 cents a year since 2022, and from 1 April 2026 the cap sits at $1.80 a day excluding GST, with the maximum distributor charge at 90 cents. The regulations are revoked on 1 April 2027, after which retailers no longer have to offer a low fixed charge option at all.

The practical consequence is that the Low User advantage has narrowed every year. The official threshold is still 8,000 kWh, but the point at which Standard User starts winning sits lower than that. Settle it with arithmetic rather than instinct. Multiply your annual usage by the gap in unit rates between the two options, then compare that against the difference in daily charges over a year.

Solar Buy-Back Rates, and the Catch

If you have solar, the buy-back rate is where Meridian looks strongest. On the open-term plans it pays 15c/kWh for exported power across most of the year. During winter peak periods — 7am to 10am and 5pm to 9pm, July through September — that rises to 24c/kWh.

That structure means the headline 24c figure covers a narrow window of the year and the day.

Three things to check before you count on these rates. They exclude GST. They are variable and can change on notice under Meridian's plan terms. And there are eligibility criteria attached, including a communicating smart meter. Fixed-term plans pay 12c/kWh with no winter peak boost, so a fixed term costs you on the solar side even where it buys certainty elsewhere.

Switching To or From Meridian

Switching retailers in New Zealand is not the ordeal people expect. You do not need to contact your current provider, and you do not lose supply — the new retailer handles the transfer, which usually takes a couple of weeks.

Have your details ready: your address, your ICP number if you know it, and a bill showing your annual usage. That last one matters most. Without a usage figure you cannot work out whether Low User or Standard User suits you.

Where Meridian Fits, and Where It Doesn't

Meridian suits households that care about the generation mix, want no fixed term, and will do the arithmetic on Low User versus Standard User. The open-term structure is genuinely flexible, the solar buy-back rates are competitive, and Night Saver rewards a household that can move load overnight.

It suits you less if you want one published price to compare at a glance, or if your usage is heavily daytime and you have no solar.

Questions You Might Have

Is Meridian really 100% renewable?

Its generation is. Every station Meridian owns runs on hydro or wind. But the electricity supplied to your home comes from the national grid, which carries a mix of renewable and non-renewable generation. Meridian says so directly on its own power stations page, and the same holds for every retailer in New Zealand.

What is the difference between Low User and Standard User?

Low User gives you a lower daily fixed charge and a higher rate per kilowatt-hour. Standard User does the reverse. Low User is designed for homes using under 8,000 kWh a year, or 9,000 in the lower South Island. Because the regulated cap has risen, the crossover point has dropped below the official threshold, so the option that looks right on paper may not be right on your bill.

What happens to Low User plans in 2027?

The regulations are revoked on 1 April 2027, after which retailers are no longer required to offer a low fixed charge option. Some may keep doing so voluntarily. Expect that decision to rest with your retailer rather than with the rules.

Do I need a smart meter for the buy-back rate?

Meridian's buy-back eligibility requires a communicating smart meter, and export rates can only be measured if the meter records what you send to the grid. If you are considering solar, sort the meter question before the panels go on, not after.

What Matters Most

The gap between Meridian's marketing and its reality is smaller than most, mainly because Meridian publishes the awkward detail itself. Its generation is renewable; the grid that delivers it is not. Once you accept that, the review comes down to arithmetic.

For an EV owner, home charging on an overnight plan is usually the cheapest way to run the car.

Run your own numbers on Low User versus Standard User, because the phase-out has moved the crossover below the official threshold. Check the buy-back rate against your actual export pattern rather than the 24c headline. And work out what the local lines charges and unit rates come to at your own address — that is the only figure that decides it.