PoweredNZCheapest EV Charging Plans in NZ Winter 2026: How the May Price Hikes Changed the Maths
If you charge an EV at home, your electricity plan is the single biggest lever on your running cost — bigger than your charger model, bigger than your car, bigger than how often you wash it. And as of this month, that lever just got more powerful. Contact lifted daily charges from 1 May, Genesis is raising retail prices an average of 12.8% from 16 May, and Meridian has warned customers to expect up to 7%. EV-specific off-peak rates barely moved. So if you're still on a standard flat-rate plan, the gap between what you're paying and what you could be paying just widened to its biggest point in years.
This piece walks through every EV-friendly plan in NZ as of winter 2026, runs the real annual numbers for two typical drivers, and tells you which retailer most likely wins for your situation — including the household-wide trap that makes a "cheap" EV plan a bad deal for some homes.
At a Glance
| Plan | Off-peak rate (c/kWh) | Off-peak window | Best for |
|---|---|---|---|
| Electric Kiwi MoveMaster | ~10–13c | 11pm–7am | Drivers who can fully charge between 11pm and 7am |
| Contact Good Nights | Free | 3 hours, 9pm–midnight (you pick the start) | Most NZ households — flexible, no smart charger required |
| Octopus Energy off-peak | ~10–14c | Roughly 11pm–7am | Heavy chargers, hot water on a timer too |
| Mercury Off-Peak / GoodEnergy | ~12–16c | Late evening / overnight | Mercury customers wanting to add an EV without switching retailer |
| Genesis Energy EV plan | ~13–16c | Overnight (smart meter required) | Existing Genesis customers, gas-and-power bundle households |
| Standard flat-rate plan | ~32–38c (anytime) | N/A | Almost no EV owner — this is what you're moving away from |
- The May price hikes mostly hit flat-rate plans and daily fixed charges. EV off-peak rates were already locked in and didn't lift in lockstep.
- Switching plans is the cheapest upgrade you can make. No installer, no equipment, no consent — just a webform and a meter read.
- Smart charger or app schedule, either works. Most plans only need your charging to happen inside the off-peak window — they don't care how you make that happen.
- Watch the anytime rate. Some EV plans offer cheap off-peak power but charge a higher rate the rest of the time. If you've got a heat pump running through winter evenings, that can wipe out the EV saving.
For the installation side of the equation — chargers, costs, and the 2026 RMA changes — see our breakdown of home EV charger installation in NZ for 2026. And for the broader buying decision, our complete EV charger installation guide covers Level 1 vs Level 2, smart vs basic, and what to ask your electrician.
Why the May Price Hikes Widened the EV-Plan Gap
A flat-rate plan in NZ now sits at roughly 32–38c per kWh depending on retailer and region, with daily fixed charges in the $1.40–$2.20 range. That's the new normal post-1 May.
Off-peak EV windows are still sitting at 10–16c per kWh. Some plans (Contact Good Nights) include a few hours of free power on top.
Two years ago, the gap between flat-rate and off-peak EV pricing was roughly 18–22c per kWh. Today it's closer to 22–28c. On a 60 kWh battery charged from 20% to 80% — about 36 kWh — that gap is the difference between paying around $13 (flat rate) and around $4 (off-peak), every single charge.
Multiply that by 50–80 charges a year and the annual difference is real money. Same car, same kilometres, same charger — different plan.
The Five EV-Friendly Plans, Ranked
Plans change. Always confirm the rate and terms directly with the retailer before signing. The summaries below reflect the public plan structures as of early May 2026.
1. Contact Good Nights — best for most households
Contact's Good Nights gives you three hours of free electricity every night between 9pm and midnight. You pick the start time when you sign up. There's no off-peak rate as such — those three hours just don't get billed at all.
For an EV owner, that's usually enough window to add 21 kWh on a 7 kW charger — about 80–100 km of range, free, every single night. That covers around 30,000 km a year of driving, well above the average NZ mileage.
Why it wins for most: No smart charger required (you can use a basic charger and a wall-socket timer if you want). No middle-of-the-night juggling. Standard anytime rate the rest of the day, so it doesn't punish high daytime users like a heat pump household.
The catch: You only get three hours. If your EV needs a full 7+ hour charge after a long road trip, you'll pay anytime rates for the rest of the session.
2. Electric Kiwi MoveMaster — best for heavy chargers
MoveMaster gives you a deep discount on the 11pm–7am window — roughly 10–13c/kWh in most regions. That's an 8-hour window, more than enough for a full charge from empty on a 7 kW charger.
Electric Kiwi is also one of the cheapest retailers full stop, so the "anytime" rate sits below the flat-rate average — in the high 20s rather than low 30s c/kWh. That makes it forgiving for households that also use a lot of power outside the window.
Why it wins for heavy chargers: Long window, low rate, low overall plan pricing. If you're driving 20,000+ km a year or have two EVs, this is the maths-friendly choice.
The catch: Charging has to happen inside 11pm–7am. You'll need either a smart charger that schedules the start, or a basic charger plugged into a timer.
3. Octopus Energy — best for time-of-use households
Octopus has time-of-use plans with overnight rates roughly 10–14c/kWh, plus competitive solar buy-back rates if you've got panels. Their structure rewards households that already think in terms of when they use power — which most EV owners learn to do anyway.
Why it wins for TOU households: Overnight rates are sharp, and the rest of the day is structured (peak / off-peak / shoulder) rather than charged at one flat anytime rate. If you can shift hot water and dishwasher load too, the savings compound. Octopus also pays solar buy-back at the higher end of the market — useful if you're pairing EV charging with rooftop panels.
The catch: TOU plans require a smart meter and a willingness to actually shift load. If your household just runs on autopilot, you may end up paying peak rates for things that didn't need to happen at peak.
4. Mercury Off-Peak / GoodEnergy plans — best for existing Mercury customers
Mercury offers reduced off-peak rates roughly 12–16c/kWh on plans designed for EV-owning households. The window is generally late evening to early morning. Anytime rates sit around the market average.
Why it might win: If you're already a Mercury customer and don't want the friction of switching, the off-peak option can take a chunk off your EV charging cost without changing retailers. Bundled gas-and-power households sometimes find Mercury keeps the bundle discount in play, which other EV-specific plans don't.
The catch: It's competitive but not the cheapest in absolute terms. If you'd switch retailers anyway, MoveMaster or Good Nights usually beats it.
5. Genesis Energy EV plan — best for existing Genesis customers
Genesis offers a TOU plan with discounted overnight rates around 13–16c/kWh, requiring a smart meter. The structure is similar to Mercury's — useful for existing customers, not the absolute cheapest if you're plan-shopping fresh.
Why it might win: Bundle discounts (gas, broadband) and the convenience of staying with one retailer. If you don't want to switch, this is the EV-friendly option within Genesis.
The catch: Anytime rates are average to slightly above average. Heavy daytime users will lose more on the anytime rate than they save on the EV window.
Real Annual Numbers: Two NZ Drivers
Let's run the maths against the new May tariffs. Assumptions: a 60 kWh EV consuming roughly 18 kWh per 100 km in mixed winter driving, charged at home, anytime rate of 35c/kWh on a flat plan.
Driver A — 10,000 km a year (commuter, weekend driving): ~1,800 kWh of charging per year.
| Plan | Charging cost / year |
|---|---|
| Standard flat-rate (35c) | ~$630 |
| Contact Good Nights (free 9pm–midnight) | ~$50–$120 (depends on top-up needs outside window) |
| Electric Kiwi MoveMaster (~12c off-peak) | ~$220 |
| Octopus off-peak (~12c) | ~$220 |
| Mercury Off-Peak (~14c) | ~$255 |
| Genesis EV plan (~14c) | ~$255 |
Driver B — 15,000 km a year (commuter + family use): ~2,700 kWh of charging per year.
| Plan | Charging cost / year |
|---|---|
| Standard flat-rate (35c) | ~$945 |
| Contact Good Nights | ~$120–$220 |
| Electric Kiwi MoveMaster (~12c) | ~$325 |
| Octopus off-peak (~12c) | ~$325 |
| Mercury Off-Peak (~14c) | ~$380 |
| Genesis EV plan (~14c) | ~$380 |
Worth saying out loud: switching from a flat-rate plan to almost any of the EV-friendly options saves $300–$650 a year on charging alone. That's most of an installation paying for itself in plan choice over five to seven years.
For a comparable winter-tariff exercise on the heating side, see how heat pump running costs change under the May 2026 tariffs, and for solar households, whether a battery is worth it now the import-export gap has widened.
Petrol-Equivalent: How EVs Compare After the Hikes
Petrol prices in NZ haven't moved much in 2026 — sitting around $2.80–$3.00 per litre for 91 octane. A reasonably efficient ICE car like a Toyota Corolla uses around 7L/100 km, putting petrol cost at about $20–$21 per 100 km.
Compare that to home EV charging:
- Off-peak EV plan (~12c): ~$2.15 per 100 km
- Standard flat-rate (~35c): ~$6.30 per 100 km
- Contact Good Nights (free window): essentially $0 for the first ~80–100 km a day
Even on the worst home charging plan, the EV is roughly a third the cost of petrol per kilometre. On the best, it's around a tenth. The price hikes narrowed that gap slightly for flat-rate-plan EV owners — but moving to an EV plan flips it back wide open.
The Household-Wide Trap
Here's the bit most plan-comparison articles skip: an EV plan isn't just about EV charging. It's about your whole bill.
Some EV plans have higher anytime rates than standard market plans — they offer cheap off-peak power to attract EV owners but quietly charge more for the hours your dishwasher, oven, hot water cylinder, and (in winter especially) heat pump are actually running.
If your household uses 8,000–10,000 kWh a year and only 1,800 of that goes to the EV, you can lose more on the anytime rate hike than you gain on the off-peak EV discount. Run the maths on your actual bill, not the marketing copy.
A quick sanity check: pull your last 12 months of usage from your retailer (most have it in the app), split it into "could be shifted to off-peak" and "happens whenever it happens", and apply the new plan's rates to both columns. If the second column blows out by more than the first column saves, the plan isn't right for you — even though it's branded for EVs.
This is where Contact Good Nights tends to win in practice: the free window is genuine, and the anytime rate stays at standard Contact pricing rather than getting bumped.
How to Actually Switch
Switching plans in NZ is genuinely fast — usually 7–14 days, no service interruption, no installation visit unless you need a smart meter.
- Check whether you have a smart meter. Most NZ homes do, but if you live somewhere rural or in an older flat without one, you'll need one fitted before TOU plans (Octopus, Genesis EV, Mercury Off-Peak) will work. Free in most cases, but lead time runs 2–6 weeks.
- Run your bill against each plan. The retailer-comparison tool at Powerswitch (Consumer NZ) is the impartial option, but it doesn't always weight EV charging well. Cross-check with the retailer's own EV calculator.
- Read the anytime rate — not just the off-peak headline.
- Confirm there's no fixed-term lock-in before signing. Most EV plans are open-term, but a few aren't.
- Schedule your charging the day your switch goes live. Either set a smart charger to start at the off-peak hour, or plug into a wall-socket timer. Otherwise you're paying anytime rates for charging that should have been free.
If you're still figuring out where an EV charger sits among your other home upgrades — heat pump, insulation, solar — take our free assessment and we'll line them up by impact for your specific home.
The Bottom Line
The May 2026 price hikes hit flat-rate plans hard and EV plans barely at all. If you've been on a standard plan since you got your EV, you're now paying significantly more than you need to — and the gap will widen further if any further tariff lifts come through this winter.
For most NZ households, Contact Good Nights is the simplest, lowest-friction win — three free hours, no smart charger required, no anytime-rate trap. Electric Kiwi MoveMaster beats it for heavy chargers and households with two EVs. Octopus wins if you've got solar or are willing to genuinely shift load across the day.
Switching takes ten minutes online and saves $300–$650 a year on charging alone — without changing a single thing about how you drive. If you've already got a charger installed and an EV in the driveway, this is the cheapest upgrade left to make.
Find verified EV charger installers in your area if you're still at the installation stage, or estimate your switching savings with the calculator if you're already charging at home and just need to confirm the numbers for your usage.