EV charger installs cross some surprisingly important compliance bits. They're worth knowing because cheap installers cut corners on them, and the consequences (a house fire, an electric shock, an insurance refusal) are sufficiently bad that pricing should not be the deciding factor on these.
§01EWRB registration
The Electrical Workers Registration Board is the legal licensing body for electricians in NZ. Every working electrician must have a current EWRB licence — anyone installing your charger without one is breaking the law, and the install will be uninsurable. Ask for the licence number and check it on the EWRB website (free) before any work starts.
§03RCD vs RCBO — and why your charger needs the second one
An RCD detects earth leakage and trips the circuit. An RCBO does the same but also has overcurrent protection (the function of an old-fashioned circuit breaker) — so a single RCBO replaces both an MCB and an RCD on a circuit. AS/NZS 3000 (the wiring rules) requires Type-A or Type-B RCD protection on EV chargers; many DC-leakage-aware chargers come with Type-A built in, in which case the circuit needs an RCBO of compatible type.
§06Certificate of Compliance (CoC)
After the install, the electrician issues a Certificate of Compliance — a one-page legal document that says the work meets AS/NZS 3000. Keep this filed somewhere safe; you'll need it if you sell the house, claim under home insurance, or have an inspection later. A reputable installer issues it as a matter of course; one that doesn't is a red flag.