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How much does it cost to charge an EV at home in NZ?
See what charging your EV at home really costs in New Zealand — and how much you save against petrol once road user charges are counted. Adjust your car, how far you drive, and your power plan. An off-peak or EV plan is usually the biggest lever on the number.
Short answer: a typical NZ EV (around 18.5 kWh/100km at the wall, driven 12,000 km a year) costs roughly $410 a year to charge at home on an off-peak overnight plan, or about $870 on a standard anytime rate. Light EVs also pay road user charges at $76 per 1,000km — about $910 a year at that distance — so the all-in cost is near $1,320, against roughly $2,880 to run the petrol equivalent. Charging itself works out near 3–7c per kilometre, with RUC adding 7.6c/km, against about 24c for petrol. Your own number depends on your car, your annual distance and the rate you charge at, so use the calculator below to put real figures on it.
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What will charging at home actually cost you?
Adjust the numbers to match your car and driving. We’ll compare home charging against running a petrol car over a year — including road user charges — and show what an off-peak power plan saves.
Not sure which charger yet? Find the right one for your home →
A guide only, not a quote. Figures are indicative NZ defaults you can edit — your actual cost depends on your car, driving and power plan. RUC rates are NZTA’s light-vehicle rates; see EV vs petrol after RUC for the full comparison.
How the calculator works
Your annual energy use is distance ÷ 100 × efficiency (kWh/100km). Multiply by your power rate for the EV cost, and compare against distance ÷ 100 × L/100km × petrol price for an equivalent petrol car. Defaults are 2026 NZ anchors — an anytime rate of 39c/kWh (Powerswitch national average), an off-peak EV-plan rate of 18.5c/kWh, and petrol at $3.00/L. We hold the petrol figure below the pump price on purpose (the national average was about $3.14/L in August 2026), so the saving shown here is understated rather than oversold. Change any of them to match your own setup. The efficiency figures are measured at the wall, so they already include the roughly 10% lost as heat while AC charging — that is the energy your retailer actually bills you for. Most NZ home charging happens overnight, which is why the off-peak rate matters so much; see our smart charger guide for how scheduling works.
Road user charges are added separately as distance ÷ 1,000 × RUC rate. Light battery EVs pay $76 per 1,000km and plug-in hybrids $38 (NZTA, verified August 2026). We keep charging and RUC on separate lines because they are different things: one is what you pay your power company, the other is what you pay towards roads. Petrol drivers pay their road contribution through fuel excise duty already baked into the pump price, so counting RUC on the EV side is what makes the comparison fair.
Want the full post-RUC comparison? This page is about what charging costs. If your question is whether an EV is still cheaper to run than petrol now that RUC applies, our EV vs petrol running cost guide is the detailed answer.
Once you know the running cost, the other half of the picture is the one-off install. Our EV charger installation cost guide breaks down a typical 7kW home install, and you can get free quotes for your actual setup.
What it costs to charge an EV at home: three worked examples
Three typical NZ scenarios, using the same method as the calculator. Charging assumes overnight off-peak near 18.5c/kWh; RUC uses the $76 per 1,000km light battery EV rate; the petrol comparison uses $3.00/L against a similar-size car (7.0, 8.0 and 9.5 L/100km respectively). These are indicative annual figures, not quotes — your real numbers depend on your car, driving and power plan.
| Scenario | Distance | Energy/yr | Charging (off-peak) | RUC | EV total | Petrol equiv. | You save* |
|---|---|---|---|---|---|---|---|
| Efficient hatch (e.g. Nissan Leaf) 17.5 kWh/100km | 10,000 km/yr | 1,750 kWh | ~$320 | ~$760 | ~$1,080 | ~$2,100 | ~$1,020 |
| Typical EV (e.g. Tesla Model 3, BYD Atto 3) 18.5 kWh/100km | 12,000 km/yr | 2,220 kWh | ~$410 | ~$910 | ~$1,320 | ~$2,880 | ~$1,560 |
| Larger EV / SUV 22 kWh/100km | 15,000 km/yr | 3,300 kWh | ~$610 | ~$1,140 | ~$1,750 | ~$4,280 | ~$2,520 |
*Saving is petrol cost minus the EV total (off-peak charging plus RUC). On a standard anytime rate instead of off-peak, charging rises to roughly $680, $870 and $1,290 respectively, which cuts each saving by about $360–$680. The biggest lever you control is the rate you charge at: shifting to an off-peak or EV power plan can roughly halve the charging half of the bill. RUC is fixed per kilometre, so the only way to reduce it is to drive less.
Frequently asked questions
How much does it cost to charge an EV at home in NZ?
For a typical EV using around 18.5 kWh/100km at the wall and a 12,000 km year, that’s roughly 2,220 kWh. At an off-peak EV-plan rate near 18.5c/kWh that’s about $410 a year; at a standard ~39c/kWh anytime rate, around $870. Use the calculator above with your own car and power plan for a closer figure.
Is charging an EV cheaper than petrol?
Yes, for most drivers — but count road user charges as well as the electricity. A typical 12,000 km year costs about $410 to charge off-peak plus about $910 in RUC, so roughly $1,320 all in, against about $2,880 for the petrol equivalent. That is still a saving of around $1,550 a year, though a smaller one than before EVs paid RUC. The exact figure depends on your distance, efficiency, power rate and the petrol car you are comparing against.
Do I still pay road user charges if I charge at home?
Yes. RUC is a distance-based road-funding charge, so it applies however and wherever you charge — charging at home changes your electricity cost, not your RUC. Light battery EVs between 1001kg and 3500kg pay $76 per 1,000km, plug-in hybrids pay a reduced $38 per 1,000km because they already pay fuel excise duty on petrol, and vehicles under 1000kg are not required to buy RUC. Petrol drivers pay the equivalent through fuel excise duty built into the pump price.
How much RUC will I pay a year?
It depends entirely on your distance, because RUC is charged per kilometre. For a light battery EV at $76 per 1,000km, 10,000 km a year is about $760, 12,000 km is about $910, and 15,000 km is about $1,140. Set your own distance in the calculator above and it will add the RUC line for you.
Does an off-peak or EV power plan really save money?
It can make a large difference, because most home charging happens overnight. Dedicated EV plans price night charging near 18–19c/kWh against a national average anytime rate of about 39c/kWh — roughly half — so shifting charging to the off-peak window is the single biggest lever on your running cost. Compare plans to see what’s available in your area.
How many kWh does it take to charge an EV from empty?
It’s roughly the size of your battery. A 40 kWh Leaf takes about 40 kWh for a full charge (a little more with charging losses); a 60 kWh EV takes about 60 kWh. At an off-peak ~18.5c/kWh rate, a full 60 kWh charge costs around $11 — but most people top up little and often rather than charging from empty.
What does off-peak overnight charging cost vs an anytime rate?
Take the typical EV in the table above at 2,220 kWh a year: at an off-peak ~18.5c/kWh rate that’s about $410, versus about $870 on a standard ~39c/kWh anytime rate — roughly a $460 a year difference for the same driving, just by charging overnight. A smart charger can schedule this automatically.
Are these figures a quote?
No — they’re an indicative guide using editable NZ defaults. Your actual cost depends on your vehicle, driving and electricity plan, and installation pricing depends on a Registered Electrician seeing your setup.