Network vs Home
Last 5 sessions
Log a session
3
Before plugging in — fill in what you know, then start charging.
¢/kWh
%
Other fees
Activation fee
One-off connection fee
$
Idle / per-minute fee
Charged by the network per minute
$/min
Caution: Idle fees may apply on this network.
Parking fee
Separate car park charge
$/hr
hrs
= 60 min · $0.03/min
Use your network app to start the charger.
Calculator
Preview a charge or estimate trip costs.
¢/kWh
Override the default rate for this calculation.
km
km
Adds RUC + total trip cost to results.
Log History
All logged charge sessions.
Network Insights
Your network charging sessions when compared with an equivalent home session.
Settings

Vehicle profile & RUCs

▼
kWh/100km
From your trip computer.
$/1,000 km
= 7.60¢/km. Admin fee excluded.

Home charging benchmark

▼
¢/kWh
¢/kWh
kW
Charging networks
Tap a network to edit its defaults.
New network
¢/kWh
$
$
$

About this project

Network v Home Charging Insights is an experiment in finding out exactly how much more EV owners pay to charge on a public network compared with the same energy taken from a home wall socket.

It started as a way to settle a simple question — "is fast-charging really that much more expensive?" — and grew into a small toolkit for previewing charges, logging real-world sessions, and building a personal benchmark.

A few things you might find interesting:

  • NZ public DC charging often costs 3–4× the price of home off-peak power per kWh.
  • Idle fees can add up faster than energy costs on busy chargers — sometimes $1/minute after the session ends.
  • RUC (Road User Charges) on EVs is $76 per 1,000 km in NZ — about 7.6¢ per km, regardless of where you charge.
  • The cheapest "fast" option in this app's defaults is Thundergrid at 25¢/kWh — close to home off-peak rates.
  • A typical 30-minute DC fast charge at 50 kW adds about 25 kWh — roughly 160 km of range in this car.
Phase 1 prototype · in-memory data