120V to 230V RV Conversions
Convert your imported American motorhome or caravan to New Zealand's 230V electrical system — expert installation, safe integration and EWOF compliance, all at our Christchurch workshop.
American RVs, Made NZ-Ready
If you've imported a motorhome or caravan from the USA — or another 120V country — converting it to 230V is essential for safe, compliant use in New Zealand. RV Solutions specialises in professional 120V to 230V conversions, bringing American motorhomes and caravans up to NZ standards so they run safely and reliably on local shore power.
It's a significant electrical project that must be done by a qualified electrician — and it's part of our complete RV electrical services, completed at our Christchurch workshop for owners across Canterbury and the South Island.
Conversion Requirements
Changing from 120V (North American standard) to 230V (NZ, Australia, UK, Europe) is a significant job. It involves reconfiguring all high-voltage components to AS/NZS 3001:2022.
Qualified Electrician Required
All 230V wiring and installation must be carried out by a registered electrician — it's not legal for unauthorised people to do this work.
Components Replaced
Almost all 120V-specific items are replaced with 230V-rated parts — inlet, outlets, appliances and the converter/charger.
Rewiring & Protection
A new RCD/MCB board, correct cable sizing (1.5–2.5mm²) and double-pole switching for both live and neutral conductors.
Compliance & Certification
On completion, the RV needs an EWOF to confirm it meets local safety standards.
What's Involved in a Conversion
Every RV is different, but a typical 120V to 230V conversion includes:
Shore Power System Upgrade
Replace the 120V inlet and update all external connections:
- 230V inlet (e.g. blue 16-amp plug)
- NZ-compliant shore power cable
- RCD and circuit protection
- Correct earthing and bonding
Distribution Board & Circuits
Replace the 120V breaker panel with a 230V RCD/MCB system:
- Residual Current Device (RCD)
- Miniature Circuit Breakers (MCB)
- Rewire with 1.5–2.5mm² flexible cable
- Double-pole switching (live & neutral)
Outlets & Internal Wiring
Replace all wall sockets and internal wiring:
- 230V double-pole switched outlets
- Wiring upgraded to 230V requirements
- Correct cable sizing for 16-amp circuits
- Appropriate protective devices
Appliance & Component Replacement
Replace or upgrade 120V appliances and converters:
- Microwave, toaster & small appliances
- Air conditioner (if AC powered)
- Fridge (if 230V-capable, may only need modifying)
- 120V→12V converter swapped for a 230V→12V unit
Components Typically Replaced
A complete 120V to 230V conversion usually involves replacing or modifying:
- Exterior 120V inlet (shore power connection)
- Interior power points (outlets)
- Circuit breaker box / RCD
- Microwave, toaster, fridge (if AC powered)
- Air conditioner
- 12V charger / converter
- Shore power cable and connectors
- Internal 230V wiring (where required)
Want the Full Detail?
Our complete guide covers everything about converting American RVs to New Zealand standards — including costs, timelines and what to expect.
Read the Conversion GuideBenefits of a Professional Conversion
Full NZ Compliance
Meets New Zealand electrical standards and regulations for safe, legal RV operation.
Safe Shore Power
Connect safely to any NZ campground, holiday park or home supply — no adapters or risks.
Insurance Coverage
Keep your insurance valid with a compliant, professionally converted electrical system.
EWOF Certification
Get the Electrical Warrant of Fitness needed for self-containment and freedom camping.
Professional Workmanship
Expert installation by qualified electricians using quality components and proper techniques.
Resale Value
A properly converted RV is far more attractive to NZ buyers and commands a better price.
Conversion Questions, Answered
Can I just use a transformer instead of converting?
Step-down transformers (230V to 120V) seem cheaper but have real limits — they add weight, take up space and draw power, most can't handle high-load appliances like air-con or microwaves, and they don't address protection, earthing or compliance. Your RV still won't pass EWOF or meet NZ standards.
A proper conversion is a permanent, safe solution that removes those concerns.
How long does a conversion take?
It depends on your RV and the scope. A basic conversion might take 3–5 days; more comprehensive work with multiple appliance swaps and extensive rewiring can take 1–2 weeks. We give accurate timeframes after inspecting your RV.
Do I need to replace all my appliances?
Not necessarily. Some appliances are dual-voltage and work fine after conversion; others can be adapted. Items that usually need replacing include:
- Microwaves (usually 120V-only)
- Air conditioners (often cheaper to replace than convert)
- Battery chargers and converters
- Some entertainment systems
We assess each appliance during inspection and recommend the most cost-effective approach.
Will my inverter still work after conversion?
It depends on the model — some American inverter/chargers can be reconfigured for 230V input, others need replacing. If replacement is needed we fit a quality pure sine wave inverter/charger suited to NZ's 230V supply, which is often a good chance to upgrade. See RV inverter installation.
What about my 12V DC system?
Good news — your 12V DC system (lights, water pump, fans) doesn't need converting. It runs on battery power and works the same regardless of shore power voltage. The conversion focuses on the 120V AC side: shore power input, distribution and 120V appliances.
Will I get EWOF certification after conversion?
Yes — assuming all work is completed to NZ electrical standards, we provide EWOF certification as part of the conversion. It's required to certify your motorhome or caravan as self-contained for freedom camping.
How much does a conversion cost?
It varies with size, complexity and scope. A basic conversion might start around $3,000–$5,000, while comprehensive work with multiple appliance replacements and extensive rewiring can be $8,000–$15,000 or more. Factors include:
- Number and type of appliances to replace
- Extent of rewiring
- Inverter/charger upgrade requirements
- Distribution board modifications
- Access and RV layout
Contact us for a detailed quote based on your specific RV.
Can you work on any brand of imported RV?
Yes — we work on all makes and models of imported RVs, including American motorhomes, fifth wheels, travel trailers and caravans from any 120V country, from compact Class B vans to large Class A motorhomes.
Ready to Convert Your American RV?
Our Christchurch workshop specialises in 120V to 230V conversions for imported motorhomes and caravans — expert advice, quality workmanship and full EWOF certification for safe, compliant operation in New Zealand.
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