The company's chief executive, Ed Harvey, started the business after the engineer converted his 1997 Honda Accord to electric as a university project.
Over the past 10 years more than 8000 home and workplace chargers have been sold in New Zealand and Australia.
Evnex’s locally made E2 Flex has a feature to schedule charging overnight or during low-cost periods, when energy companies often offer cheap or free power.
New data by the company shows the average amount of energy used per EV home-charging session in New Zealand has almost doubled over the past four years, rising from 7.3kWh in 2021 to 13.3kWh in 2025.
Evnex chief executive Ed Harvey said in a statement the increase was because EV batteries were getting larger and vehicle ranges were continuing to climb.
"It’s what we expected, but it’s a strong reminder that as EV batteries grow, so do home-charging costs and it’s something homeowners can plan for with the right smart charger."
Reliable, fast and smart home charging was becoming more important for everyday drivers to keep up with modern EVs’ energy needs and to manage household energy costs, he said.
New EVs use more energy per charging session, however they need to be plugged in less often because of their increased battery capacity and range.
Home-charging sessions have on average dropped from 30 per month to 18 during the past three years.
Mr Harvey said many Evnex customers were taking advantage of off-peak pricing to charge virtually free of charge.
He said about two-thirds of them charged at night with many charging for free using solar or free power windows.
As well as offering off-peak scheduling, the E2 Flex charges up to four times faster than a standard wall socket and has built-in home overload protection.
The charger is the first in New Zealand to work off the grid with an upgrade offer to link to solar power.
Evnex said the E2 Flex was designed to match a changing local market undergoing falling prices as offshore brands such as BYD offered new EVs for less than $30,000.
