Free Tool · RV Solutions Christchurch

RV Solar Calculator

Build your real power use, set where and when you travel in New Zealand, and get a live recommendation for solar, battery and days of off-grid autonomy. No sign-up — just move the sliders.

Talk to our team See all solar options
1

Set where & how you travel

Region, season and how many no-sun days you want to cover.

2

Add what you'll run

Pick a starting style, then fine-tune your fridge, devices and appliances.

3

Get your live result

See recommended solar, battery and off-grid days update as you go.

Build Your System

Size It As You Go

Everything updates live on the right as you adjust. Not sure on a value? The defaults are sensible starting points — and we'll confirm the real design with you either way.

1

Where & how you travel

Region
Sunlight hours drop as you head south — it changes the answer a lot.
Season you'll mostly travel
Winter sun is weak and low — plan for the worst month you'll use it.
How long you want your batteries to carry you through poor solar days.
2

What you'll run

Quick start — pick a style, then fine-tune below
12V compressor fridge / freezer
Bigger loads — toggle what you use
TV / entertainment~45W
Hours/day: 3
Starlink / internet~25W continuous
Hours/day: 8
Diesel heaterfan/glow ~35W
Hours/day: 6
CPAP machineovernight ~55Wh
Inverter cooking & 230V appliances
Light = coffee, charging tools. Medium = microwave, toaster. Heavy = induction cooking, air fryer, kettle.
The Range

Compare the Packages

Your result highlights the best-fit below. Every system is built around quality components — Victron, SOK and Enerdrive — and installed and certified at our Christchurch workshop.

These packages are a planning guide. The right system for your RV depends on your vehicle, roof space, mounting, cable runs, inverter/charger choice and any electrical certification — we'll tailor it and confirm everything with you. Ask us for a tailored quote.

More Than Solar

Explore Our Other Services

Solar is one part of what we do. We're a full RV electrical workshop in Christchurch — here's how else we can help power your travels.

Solar Installations

Full rooftop solar design and install — the complete version of what this calculator estimates.

Learn more

Battery Upgrades

Lithium (LiFePO4) upgrades for more usable power, less weight and longer off-grid stays.

Learn more

Inverter Installation

Pure sine wave inverters to run 230V appliances cleanly and safely from your batteries.

Learn more

REDARC & Battery Management

BCDC chargers and complete battery-management systems to keep every source charging you properly.

Learn more

EWOF Certification

Electrical Warrant of Fitness inspections for your RV's 230V system, by a registered inspector.

Learn more

Back to Home

See everything we do — our full range of RV electrical, solar and power services in one place.

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Want it engineered around your actual setup?

We'll spec solar, batteries, charging and inverter integration for exactly how you travel in NZ conditions — then install and certify it.

Book a solar chat