This article was written by a real person: Rhys Coffin, Off-Grid Solar Designer.
When considering off-grid solar cooking, many homeowners start by comparing gas cooking and electric cooking, but modern induction hobs have changed the landscape entirely.
At Power Station NZ, we design and build complete off-grid solar systems, so we see firsthand how cooking choices affect solar energy use and battery sizing.
In this article, we’ll explore why induction cooking is now the most efficient and sustainable option for off-grid solar cooking, and how it stacks up against older-style electric elements and bottled gas.
Our advice comes from practical experience, completing hundreds of designs and installations around the country and the Pacific Islands.
At any time, to get expert help with no obligation, you can get in touch or Book a Free 15 Minute Phone Call.
Before we get started, here’s a summary (TL;DR) of the key points:
The Hidden Costs of Old Electric Elements
Traditional electric coil or ceramic elements were never designed for efficiency. They work by heating up a metal coil, which then transfers heat to the cookware. The problem is that much of that heat escapes into the surrounding air.
Typically, only 60–70% of the energy from an old-style electric hob goes into the food. That inefficiency makes them a poor match for off-grid solar cooking, as they demand high power loads and long cook times, increasing battery drain and generator use.
In short: they cook slowly, waste energy, and make your solar system work harder than it needs to.
While two induction elements running for 30 minutes each per day might consume 2kWh, a ceramic or coil element might use 4kWh!
Induction Hobs: The Future of Off-Grid Solar Cooking
Induction hobs are a game-changer for off-grid solar cooking, especially if you can invest a little more upfront for the additional solar components.
Instead of heating an element, induction uses magnetic fields to heat the pan directly. The energy transfer is incredibly efficient — around 85–90% of the electricity used is converted into heat in the cookware itself.
That means:
- Faster cooking times
- Instant temperature control
- Less wasted energy and heat
- A cooler, more comfortable kitchen
For off-grid living, that level of efficiency is gold. Less power wasted means fewer solar panels and fewer batteries to meet the same cooking demand.
When paired with a correctly sized solar and battery setup, induction hobs allow homeowners to cook cleanly, quietly, and reliably using free solar energy.
Comparing Induction Cooking and Gas for Off-Grid Homes
Many people living off-grid in New Zealand still use LPG gas bottles for cooking. It’s a familiar and easy option, with low installation costs and quick setup. However, the real comparison comes down to long-term cost, efficiency, and sustainability.
Gas Cooking: Pros and Cons
Advantages:
- Instant heat and control
- Works independently of electricity supply (no grid needed)
- Simple setup with gas bottles and a regulator
- Cheaper set-up due to fewer solar panels and less battery storage
Disadvantages:
- Low efficiency: Only about 35–40% of the energy in LPG is used for cooking
- Rising fuel costs: LPG prices in New Zealand have been steadily increasing
- Ongoing costs: Gas bottles need regular refilling or replacement
- Carbon emissions: Gas is still a fossil fuel, producing CO₂ when burned
While gas can be useful as a backup, it no longer offers the low-cost solution it once did.
As at 2025, according to Consumer NZ’s Powerswitch, prices could increase by at least 10% annually.
As gas prices rise, many off-grid homeowners are shifting to all-electric off-grid solar cooking powered by the sun.
The Cost of Induction: Solar Panels and Batteries
It’s true that switching to induction cooking means your off-grid solar system needs to handle higher short-term power loads. You may need two or four additional solar panels and probably some extra battery capacity to ensure smooth operation — especially for evening cooking.
For the extra components, you should budget from $4,000 inc GST. This could increase depending on the length of time you choose to use an induction hob, and the number of hobs running at any one time.
However, once that system is in place, your cooking energy is completely free. There are no ongoing LPG refills, no emissions, and no dependency on fuel deliveries.
While most Kiwis cook after dark (requiring battery storage), cooking during daylight hours—where possible—also allows your induction hob to draw directly from your solar array, minimising battery use.
Over time, the small upfront cost of extra solar capacity is easily outweighed by years of zero fuel costs.
Why Off-Grid Solar Cooking Makes Sense
Choosing induction cooking powered by solar energy means you’re cooking with clean, renewable power generated right on your property. You’ll enjoy:
- Faster, more responsive cooking performance
- Lower long-term energy costs
- Zero fossil fuel use
- Full energy independence
For anyone building or upgrading an off-grid kitchen in New Zealand, induction cooking is the most efficient, sustainable, and future-proof option available (assuming your finances can stretch).
Conclusion: Invest Once, Cook for Free
If your goal is a truly self-sufficient home, induction cooking fits perfectly into a solar-powered lifestyle. While bottled gas might seem cheaper at first, its rising price and ongoing maintenance make it a short-term solution.
By investing slightly more upfront in solar and battery capacity, you’ll eliminate fuel costs for good — and cook using clean, renewable energy straight from the sun.
We build complete, scalable off-grid solar systems that can easily power modern induction hobs and other high-efficiency appliances.
Get in touch to explore how we can help design the perfect system for your off-grid solar cooking setup.
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