Every question, every answer, every source

If your main concern is “what happens to my power bill when my income has a bad week?”, it helps to separate policies that could lower the underlying cost of electricity from policies that mainly help households invest in their own generation.

As of 4 October 2026, the major parties are taking quite different approaches. The 2026 general election is scheduled for 7 November 2026. 2026 Election Q&A – Science

First: why power bills are high

New Zealand's electricity problem isn't simply that generators are charging too much.

• Network costs are a major component. The Electricity Authority says the April 2025 increase in many bills was substantially about the cost of renewing and expanding ageing transmission and distribution networks. Distribution alone is roughly a quarter of a typical household bill. Retail power prices and power supply security | Electricity Authority
• Gas shortages have made wholesale electricity much more expensive. The Electricity Authority estimates the average wholesale price at Ōtāhuhu rose from roughly $100/MWh in 1997–2018 to about $160/MWh from 2019 to early 2026, with declining domestic gas supply a major factor. Breaking the link between gas supply and power prices and what it means for New Zealand’s energy future | Electricity Authority
• Dry years matter. When hydro storage is low, New Zealand needs more thermal generation, particularly gas and coal. Thermal generation therefore tends to set higher prices during periods of scarcity. How thermal generation costs affect wholesale electricity spot prices | Electricity Authority
• Market concentration is also an issue. Genesis, Contact, Meridian and Mercury dominate generation and retailing, which is why several parties are proposing competition reforms. The Electricity Authority has itself concluded that stronger competition between the big gentailers and independent retailers is needed. Electricity Authority moves to level the power playing field | Commerce Commission

So there is reasonable evidence for several different mechanisms to reduce costs—but considerably less evidence that any party's complete package will produce a particular reduction in your household bill.

What the parties are proposing

Party	Main approach	What could lower bills?	Evidence / uncertainty
National	More generation, LNG backup, competition reforms, cheaper financing for household solar	More supply should reduce scarcity prices; LNG is intended to prevent extreme dry-year spikes; solar/efficiency can reduce an individual household's purchases	There is strong evidence that more renewable supply can depress wholesale prices, and dry-year backup is genuinely a problem. But the government's claimed ~$50/household/year LNG saving is a government estimate, not an observed saving. Delivering LNG to support energy security | National Party
Labour	SolarSaver: subsidies/finance for solar, plug-in solar for renters, community batteries; price-gouging rules	Reduce households' electricity purchases; enable renters to generate power; competition/consumer protection	The underlying solar economics are quite well supported. EECA estimates a suitable 5kW system can save an Auckland household around $1,246/year, though actual savings vary considerably. Release: Labour to make power bills more affordable with SolarSaver
Greens	Kiwipower public generation/firming, zero-interest solar/battery loans, community energy, renters' solar rights, home efficiency	More renewable generation plus public investment in backup; lower household consumption; community ownership	There is good evidence that renewable generation lowers wholesale prices when available, and that solar can lower individual bills. But the proposed Kiwipower model itself hasn't been independently demonstrated to lower retail prices, and its wider market effects haven't been modelled. Green Party launches plan to cut power bills and take power back from the big energy companies - Green Party of Aotearoa New Zealand
NZ First	Split generators from retailers, change wholesale pricing, fixed-price contracts for new generation, solar buy-back at retail price	Make it easier for independent retailers to compete and prevent generators controlling both supply and retailing	Competition concerns are real, but there isn't strong independent evidence that forced gentailer separation would lower household bills. The proposal also leaves important details of the replacement market design unresolved. Breaking up the Gentailers - New Zealand First
ACT	More competition in networks, easier private generation, fewer restrictions on selling electricity, tighter scrutiny of monopoly lines companies	More generation and competition; constrain network-cost increases	Competition and additional supply have a plausible cost-reduction mechanism. But the size and timing of household savings aren't quantified. ACT New Zealand
Te Pāti Māori	$1b Energy Sovereignty Fund, Māori/community-owned generation, stronger powers against excessive pricing	Shift ownership of generation to communities and increase local generation/storage	Community generation can reduce energy costs in appropriate circumstances, but the proposed $1b ownership model hasn't been independently modelled for its effect on nationwide retail prices. We Want Cheaper Power And We Want Our People To Own It. - Te Pāti Māori

National: attack the supply problem

National's approach is essentially “build more electricity and make sure there's backup when renewables aren't available.”

Its Home Energy Fund would provide long-term loans, secured against the home and repaid through rates, for solar, batteries, insulation and other energy investments. It also wants planning rules that make small-scale renewables easier to build. Home Energy Fund, Our Plan to Electrify NZ | National Party

At the system level, National has committed to an LNG import facility. The rationale is that gas can provide backup during dry years when hydro, wind and solar aren't sufficient. The government says the facility could save about $265m a year, or roughly $50 per household, by reducing price spikes and the risk premium in electricity prices. That's a modelled/claimed benefit rather than an independently demonstrated saving, and LNG itself has to be purchased and infrastructure financed. Delivering LNG to support energy security | National Party

There is, however, independent support for the underlying problem: Frontier Economics' 2025 electricity-market review concluded that the market was not adequately delivering dry-year backup, while also finding that it was delivering a strong pipeline of cheaper renewable generation. Ministerial Services briefing template

So the evidence is relatively strong for “New Zealand needs additional firming/backup”; it is weaker for “this particular LNG facility will reduce your bill by $50.”

Labour: make household solar accessible—including to renters

Labour's SolarSaver is particularly relevant to someone renting.

It proposes:

• grants of up to $3,000 for eligible low- and middle-income households;
• low-cost finance for solar;
• community batteries;
• allowing plug-in balcony solar for renters;
• changes allowing lines companies to offer financing where solar benefits their networks. Release: Labour to make power bills more affordable with SolarSaver

The basic economics of solar are unusually well supported. EECA estimates that a 5kW system in Auckland could save about $1,246 per year under its assumptions, with a typical payback of around 7–10 years. But savings depend heavily on how much electricity you use during daylight and whether you're able to install a suitable system. Breaking down home solar costs and savings | EECA

There's also an important recent development: the government has already agreed to progress rules that would legalise plug-in solar, partly because it offers a lower-cost option for renters and others unable to install conventional rooftop solar. The regulatory review estimates $28m–$50m of net benefits over ten years from its wider solar reforms. Residential and small to medium scale solar review | Ministry for Regulation

That means there's actual evidence behind the technology and regulatory reform, even though Labour's particular subsidy package hasn't been tested in practice.

Greens: change the market itself

The Greens' biggest proposal is Kiwipower, a publicly owned Crown entity that would invest in renewable generation and, importantly, firming capacity such as batteries, geothermal, biomass and pumped hydro. It would also contract existing firming capacity and make it available to independent retailers. Green Party launches plan to cut power bills and take power back from the big energy companies - Green Party of Aotearoa New Zealand

The Greens combine that with zero-interest solar/battery loans, a renters' right to solar, $200m for community energy, solar on more than half of public homes within four years and an expanded Warmer Kiwi Homes programme. Power for all of us - Green Party of Aotearoa New Zealand

There is a solid economic case for some of this: the Electricity Authority has observed that high renewable output can produce dramatic falls in wholesale prices—for example, wholesale prices fell from over $280/MWh in late August 2025 to around $30/MWh in October as wind and hydro generation increased. Wholesale prices plummet as the proportion of renewables increases | Electricity Authority

But Kiwipower is a much bigger step than simply building renewable generation. An independent Infometrics review of the Greens' 2026 costings said the assumptions appeared reasonable, but specifically did not model the wider effects of the individual policies on investment behaviour or the electricity market. Greens pledge 'Kiwipower' to boost renewables and cut power bills

So there's evidence for the building blocks, but not yet strong evidence that the entire Kiwipower model would deliver a particular reduction in your bill.

NZ First: break up the big four

NZ First wants to split the major gentailers into separate generation and retail businesses, change the wholesale pricing system, stop generators withholding supply to push prices up, guarantee fixed-price contracts for new generation, and require household solar to be bought at the same price consumers pay for electricity. Breaking up the Gentailers - New Zealand First

This is the most radical structural proposal.

The argument has some basis: independent retailers need access to wholesale risk-management products to compete, and regulators have already acted to prevent the big gentailers from giving their own retail arms preferential treatment. Electricity Authority moves to level the power playing field | Commerce Commission

But that isn't the same thing as evidence that physically breaking up the companies will lower bills. An analysis from the New Zealand Initiative argues that separation could increase costs rather than reduce them; NZ First's proposal also doesn't specify exactly how its replacement pricing system would work. Why Splitting Electricity Companies Won't Lower Your Bill

In other words, there is evidence for more competition, but much less evidence for this particular form of structural separation.

ACT: let more supply and competition into the system

ACT's current proposal is to open electricity networks to greater competition, give households more freedom to generate and sell electricity, and require monopoly lines companies to demonstrate value before adding costs to bills. ACT New Zealand

This overlaps with reforms already being implemented. From July 2026, large retailers have to offer time-of-use pricing, while rules encourage better compensation for electricity supplied from rooftop solar and batteries when the network needs it most. The Electricity Authority estimates households that actively shift consumption could potentially reduce their bills by around 20%, although it explicitly warns that households unable to change when they use electricity could pay more. New ways to empower electricity consumers | Our consultations | Our projects | Electricity Authority

That's a useful distinction: the mechanism has evidence behind it, but the benefit depends on your ability to change your consumption pattern.

Te Pāti Māori: ownership and local generation

Te Pāti Māori proposes a $1 billion Energy Sovereignty Fund, Māori and community-owned energy assets, stronger regulatory powers against excessive pricing and better payment for household/community generation and storage. We Want Cheaper Power And We Want Our People To Own It. - Te Pāti Māori

The potential advantage is that communities could retain more of the economic benefit from generation rather than simply buying electricity from large companies. But, like Kiwipower, the nationwide bill impact of the proposed ownership model hasn't been independently quantified.

What matters particularly for you as a renter

This is where the headline promises can be misleading.

If you rent, policies involving a homeowner taking out a long-term loan for rooftop solar may not help you directly. National's Home Energy Fund, for example, is explicitly secured against the home. Home Energy Fund, Our Plan to Electrify NZ | National Party

Policies that could matter more directly to a renter are:

1. Plug-in/balcony solar — Labour and the Greens support it, and the government is already progressing regulatory changes to permit it. Release: Labour to make power bills more affordable with SolarSaver
2. Community batteries / community generation — potentially useful without owning the building.
3. Cheaper off-peak electricity — already being rolled out through Electricity Authority rules. This could be useful if your roster allows you to shift washing, heating, hot-water use or EV charging to cheaper periods. New ways to empower electricity consumers | Our consultations | Our projects | Electricity Authority
4. System-wide reductions in wholesale/network costs — these are the only proposals that potentially benefit you without requiring you to own anything.
5. Direct hardship assistance — worth distinguishing from “lowering electricity costs”. A policy can make electricity cheaper without making your variable income less risky, whereas targeted assistance can do the latter.

And there's a particularly important caveat for your situation: a policy that saves a homeowner $1,000 a year isn't equivalent to a policy that reduces the bill paid by a renter by $1,000. The former requires capital, a suitable property and enough time to recover the investment.

What the evidence currently says

I'd divide the proposals into four evidence levels—not rankings of parties, but of the policy mechanisms themselves:

• Strongest evidence: adding low-cost renewable generation and allowing consumers to shift demand. We can already observe wholesale prices falling when renewable supply rises, and the Authority has evidence supporting time-of-use pricing. Wholesale prices plummet as the proportion of renewables increases | Electricity Authority
• Strong evidence of a real problem: New Zealand needs additional dry-year/firming capacity, and declining gas availability has increased price volatility. The independent Frontier review supports this. Review of Electricity Market Performance by Frontier Economics
• Promising but household-dependent: rooftop/plug-in solar. EECA's estimates show substantial potential savings, but the economics depend on the property, usage pattern and ability to install it. Breaking down home solar costs and savings | EECA
• Least established: major structural changes such as forcibly separating gentailers or creating a new state generation company. These might work, but there isn't comparable empirical evidence showing what they would do to New Zealand household bills, and important implementation details remain unresolved. Breaking up the gentailers · NZ First | Politika

One thing I would not assume

It's tempting to reduce the election choice to “renewables = cheaper” versus “gas = cheaper.” The evidence is more complicated.

New Zealand's very high-renewable system can produce extremely cheap electricity when water, wind and sun are plentiful. But because hydro output varies, cheap generation needs reliable firming. Gas can provide that firming, while batteries, geothermal, demand response and other technologies can provide some of it too. The central economic question is therefore not just what is the cheapest generation? but what combination gives households reliable electricity at the lowest total system cost? How thermal generation costs affect wholesale electricity spot prices | Electricity Authority

For a renter with variable weekly income, I'd therefore pay particular attention to policies affecting the bill you actually receive each month, rather than headline investment figures: network charges, retail competition, time-of-use pricing, renter-accessible solar, and whether a party has independently costed its claimed household savings.

If you want, I can next do a party-by-party comparison specifically for a renting couple on fluctuating income, including estimated effects on a typical Auckland power bill, upfront costs, who qualifies, and how credible each party's claimed savings are.