Every question, every answer, every source

Yes. If electricity cost and security of supply are important voting issues for your household, I would distinguish between parties that have a reasonably concrete plan for the electricity system and parties whose proposals are mainly about broader cost-of-living relief.

The starting point matters: electricity prices rose 6.8% on average in the first half of 2026, after an 8% rise in 2025. The Electricity Authority says network/lines charges were the largest contributor to the latest increase. At the same time, New Zealand is building renewable generation rapidly, but Transpower says rising demand, declining domestic gas supply and possible project delays create a significant dry-year risk later this decade. Data shows 6.8% increase to power bills across households and small businesses | Electricity Authority

My assessment

Party	Lower prices	Reliable supply	What I think is credible
National	🟢 Strong	🟢 Strong	Probably the most comprehensive market-led plan
ACT	🟢 Strong	🟢/🟡	Strong on removing barriers to new generation; less direct protection from market power
Greens	🟢 Strong ambition	🟢 Strong ambition	Serious alternative based on public investment, but much bigger structural intervention
NZ First	🟢 Strong intervention	🟢/🟡	Very aggressive on gentailer market power; execution risk is substantial
Labour	🟡 Moderate	🟡	Good household/solar measures, but less convincing on the national supply problem
Te Pāti Māori	🟢 Strong community focus	🟡	Interesting ownership model, but less developed on system-wide supply

1. National — strongest conventional answer to both problems

National's Electrify NZ 2.0 is unusually specific. It proposes:

• faster approval and connection of wind, solar, hydro and batteries;
• new "energy development zones";
• allowing households with solar/batteries to sell electricity to whichever retailer offers the best deal;
• reforming the backup-power market to address dry-year risk;
• reviewing lines charges;
• making affordability an explicit objective for the Electricity Authority;
• low-interest financing for household solar, batteries and insulation;
• requiring new data centres to bring additional firmed generation. Affordable power Kiwis can rely on | National Party

That addresses both sides of the problem: build more electricity and make the market/network work better.

The important caveat is that National's approach isn't a promise that your bill will immediately fall. The Electricity Authority says lines charges alone accounted for 54% of the recent price increase, so faster generation construction won't instantly fix household bills. Data shows 6.8% increase to power bills across households and small businesses | Electricity Authority

Verdict: If your priority is "I want a realistic plan to get substantially more electricity built while retaining a competitive market," National has one of the most credible propositions.

2. ACT — strongest pure competition/supply argument

ACT is pushing an even more market-oriented approach. It wants households and businesses to have greater freedom to generate electricity and choose who buys their surplus, while forcing monopoly lines companies to demonstrate value before imposing additional costs. ACT New Zealand

The attraction is straightforward: make it easier and more profitable to build generation, and competition should put downward pressure on prices.

ACT also argues that New Zealand needs much more electricity rather than simply trying to redistribute the existing supply. That's consistent with Transpower's warning that demand growth means investment needs to continue through the 2030s. Accelerated investment in electricity supply must continue, Transpower analysis shows | Transpower

The weakness is that competition alone doesn't necessarily solve the dry-year problem. New Zealand needs electricity that is available when hydro lakes are low and wind/solar output is poor. MBIE explicitly says this requires long-duration firm energy. Strengthening New Zealand’s dry-year regulatory framework | Ministry of Business, Innovation & Employment

Verdict: Very credible on getting more generation and investment, somewhat less convincing to me on the difficult question of who pays for/guarantees backup during prolonged shortages.

3. Greens — strongest public-investment alternative

The Greens take the opposite structural approach. Their plan would establish Kiwipower, a publicly owned electricity company, to build renewable generation and contract firming capacity. They also propose zero-interest clean-energy loans, community energy, more rooftop solar and stronger protection for households exporting electricity. Power for all of us - Green Party of Aotearoa New Zealand

This directly addresses something important for a family like yours: you don't necessarily have to be wealthy enough to buy a $20,000 solar/battery system upfront to benefit from cheaper generation.

The Greens' plan is also explicitly designed around the dry-year problem rather than assuming that simply building more wind and solar solves everything.

The question is execution and cost. Kiwipower represents a substantial change to how the electricity market works, and the benefits would depend on the government getting the investment decisions right.

Verdict: Probably the most comprehensive alternative if you believe public ownership should play a much larger role in keeping electricity affordable. More interventionist and therefore higher implementation risk.

4. NZ First — most aggressive attack on the gentailer model

NZ First has perhaps the clearest diagnosis of the market-power problem. It proposes splitting the major electricity companies into separate generation and retail businesses, arguing that companies shouldn't control both the power and the customer. It also proposes long-term contracts for new generation and requiring new-build generation to have priority access to customers. Breaking up the Gentailers - New Zealand First

That is potentially significant for prices. New Zealand's four major gentailers have historically had a very large share of generation and retail, and the current market structure is a major part of NZ First's argument.

But I'd mark it down for implementation risk. Breaking up the gentailers is a very large structural intervention, and the policy doesn't make it obvious how much of the resulting saving would actually appear on a typical household bill.

Verdict: Strongest "change the market fundamentally" proposal. Potentially powerful, but considerably less certain than National/ACT's evolutionary approach.

5. Labour — useful household measures, but weaker system-wide proposition

Labour's standout electricity policy is SolarSaver. It would provide government-backed finance, subsidies of up to $3,000 for eligible households, plug-in solar options for renters and a $30m community-battery fund. Labour says a typical participating household could save around $1,000 a year. Labour's SolarSaver - Solar Without the Upfront Cost

Labour also proposes making price gouging illegal for essential goods and services, explicitly including energy. Labour's 2026 Election Policies

Those policies could be quite relevant to a family with limited monthly buffer.

But there is an important distinction: SolarSaver is primarily a household-energy policy, not a national electricity-supply strategy. Labour's current election platform is much less detailed than National's or the Greens' on how it intends to solve the system's long-duration firm-energy problem. Labour opposes the government's LNG approach and argues that renewable generation is the better long-term answer. Release: LNG facility won’t solve anything

Verdict: Attractive if your main concern is reducing your own household's energy costs, less compelling if your question is "Who has the strongest plan for keeping the whole country supplied through a dry winter in 2028–35?"

6. Te Pāti Māori — interesting ownership proposition

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

There is a credible idea here: increasing the number of owners and generators could diversify the market while retaining more of the economic benefit locally.

But compared with National, Greens or NZ First, there is less detail about exactly how the proposal would address the country's national dry-year/firming requirement.

The issue I'd put above party promises

For your circumstances, I'd pay particular attention to firm electricity supply, not just the number of new wind and solar farms.

New Zealand's electricity system is already highly renewable. The problem is that hydro depends on rainfall, while wind and solar depend on weather. Meanwhile domestic gas supplies are declining. MBIE says that without enough long-duration firm energy, dry years can produce both high wholesale prices and supply-interruption risk. Strengthening New Zealand’s dry-year regulatory framework | Ministry of Business, Innovation & Employment

Transpower's 2026 assessment is particularly useful for judging the parties: it says supply is secure in the near term provided committed projects arrive on time, but the winter energy margin falls below the security standard by 2031 in its reference case. Security of supply | Transpower

So I would ask every party three questions:

1. What exactly will provide electricity during a prolonged dry winter?
2. Who pays for that backup, and how do we prevent the cost being dumped onto household bills?
3. What mechanism actually causes enough new generation, storage and transmission to get built on time?

On those tests, my rough ranking would be:

National ≈ Greens > ACT > NZ First > Labour > Te Pāti Māori

—but with an important qualification: National and ACT are strongest if you favour private investment and competition; the Greens and NZ First are stronger if you think the existing market structure itself is the problem.

And I wouldn't interpret that ranking as "National will necessarily give you the cheapest bill." The current evidence suggests that lines charges, wholesale energy costs, retail competition and the cost of firming supply all matter, so no party can credibly promise that simply building more renewable generation will make your household bill plunge. Data shows 6.8% increase to power bills across households and small businesses | Electricity Authority

If you want, I can next do a household-focused comparison of National vs Labour vs Greens vs ACT vs NZ First, estimating which policies are most likely to affect a mortgage-paying family with, say, a $250–$350 monthly power bill over the next 3–5 years.