Off-grid solar carries a powerful appeal — no power bill, no lines company, complete independence. But appeal and economics are different things, and the honest answer to “is it worth it?” hinges almost entirely on one number you might not have thought about: what it would cost to connect your property to the grid. Get that number, and whether off-grid is brilliant or foolish usually becomes obvious. Here’s how to think it through.
The question that decides it: your grid-connection cost
For a home that’s already connected to the grid, or could be for a few thousand dollars, off-grid rarely makes financial sense. A full off-grid system costs far more than grid-tied solar — typically $40,000–$70,000+ versus $11,000–$16,000 — because you’re paying for a large battery bank, an oversized array, and a backup generator to replace the grid you’re choosing not to use. Spending three to four times as much to disconnect from a cheap, reliable grid is hard to justify on the numbers.
But flip the situation. For a remote or rural property with no existing connection, the lines company’s quote to run power to your boundary can be eye-watering — $40,000 to $100,000 or more, depending on how far the nearest line is. Suddenly the comparison changes completely. You’re no longer comparing off-grid against cheap grid power; you’re comparing it against a five- or six-figure connection bill plus ongoing power charges forever after.
In that light, an off-grid system at a similar or lower cost — one that then has no power bill at all — stops being a luxury and becomes the smart, often cheaper, option. This is the pivot the whole decision turns on.
Running the comparison honestly
To know which side of the line you’re on, get two numbers:
- The grid-connection quote for your property, from the local lines company. For a remote block this is the big one — ask early, because it often surprises people.
- The off-grid system cost, properly sized for your usage and your location’s winter sun.
Then compare the whole picture: connection cost plus decades of power bills on the grid-tied side, against the off-grid system cost plus its long-term running costs (a battery bank and generator both need eventual replacement and upkeep). For a genuinely remote property, off-grid frequently wins. For anything near existing lines, grid-tied usually does.
Beyond the money: the lifestyle factor
Off-grid isn’t a purely financial decision, and it’s worth being honest about the non-money side:
- Independence and resilience. You’re immune to grid outages and power-price rises — genuinely valuable to some people, and the whole point for others.
- Hands-on involvement. Off-grid asks more of you: keeping an eye on the battery state, running big loads when the sun’s out, maintaining a generator. Some find that satisfying; others find it a chore.
- Sizing for the worst case. You must size for the gloomiest week of winter, because there’s no grid to bail you out. That means either a generously sized (expensive) system or accepting some generator running in winter.
For the right person on the right property, these are features. For someone who just wants cheap power and no fuss on a connectable suburban section, they’re reasons to stay grid-tied.
So — is it worth it?
The honest summary:
- Worth it when connecting to the grid is very expensive or impossible (a remote block, a far-flung bach, a new build down a long driveway), and especially when you value independence and don’t mind the hands-on side.
- Not worth it when an affordable grid connection exists — staying grid-tied (and adding a battery if you want backup) is cheaper, simpler, and more reliable.
The mistake is deciding on romance instead of the connection quote. Get that number first; it usually answers the question for you.
The verdict
Whether off-grid solar is worth it in New Zealand comes down to what a grid connection would cost you. Against a cheap connection, off-grid’s $40,000–$70,000+ price tag rarely pays. Against a $40,000–$100,000 rural connection quote, it becomes the sensible — sometimes cheaper — choice, with no power bill ever after. Add the lifestyle value of independence, weigh the hands-on reality, and the decision usually makes itself.
Get a free assessment and we’ll help you weigh off-grid against the cost of connecting.
Sources: Off-grid and grid-tied cost ranges per NZ industry data (2026); rural grid-connection cost ranges per lines-company pricing. Figures vary widely by property and location.