A reasonable question before investing in solar: does New Zealand actually get enough sun for it to be worthwhile — and does it matter which region you’re in? The answer is encouraging. New Zealand has surprisingly good solar resource, better than many people assume, and better than plenty of countries where solar is hugely popular. Where you live does affect output, but less dramatically than you might think. Here’s what to expect around the country.
New Zealand gets solid sun
Start with the headline: a kilowatt of well-oriented panels generates roughly 1,300–1,400 kWh a year in the main centres. That’s a genuinely good figure — comparable to or better than much of Europe, including countries that have adopted solar enthusiastically. The “we’re too far south, too cloudy” worry is largely a myth; New Zealand’s solar resource is more than enough to make rooftop solar pay for a well-suited home.
So a typical 6.6 kW system generates somewhere around 8,500–9,500 kWh a year in much of the country — a meaningful dent in a family’s usage, wherever you are.
How much does region matter?
Region affects output, but the spread across populated areas is smaller than people expect. Roughly:
- The upper North Island (Northland, Auckland, Bay of Plenty) sits at the higher end — more sun, a bit more generation per kW.
- The central and lower North Island and the top of the South are solidly in the middle.
- The South Island, including Christchurch and further south, still performs well over a year — Christchurch makes nearly as much per kW annually as Auckland. The bigger difference down south isn’t total output, it’s the seasonal swing (see solar in the South Island).
The upshot: from Kaitaia to Invercargill, solar generates well. The regional differences fine-tune the numbers; they don’t decide whether solar works.
It’s not just latitude
A few regional factors beyond how far south you are:
- Local climate and cloud. Sunnier regions (parts of the Bay of Plenty, Nelson, Marlborough, Central Otago) do a little better; consistently cloudier spots a little less.
- Seasonality. The further south, the bigger the gap between long summer days and short winter ones — more on that in the South Island guide.
- Your specific roof. Orientation, pitch, and shade affect your output far more than your region does. A north-facing, unshaded roof in Christchurch will out-generate a shaded, south-facing one in Auckland. Local sun is the backdrop; your roof is the foreground.
What it means for sizing and payback
Because regional output varies modestly, it feeds into your numbers rather than dominating them:
- A sunnier region generates a bit more per kW, so the same system pays back slightly faster.
- A more seasonal region produces more of its output in summer and less in winter, which matters if your usage is winter-heavy.
But the bigger levers on your payback remain your self-consumption (using your own power) and your roof — not your postcode. Region is a real factor, just not the decisive one. Your installer will use local generation data for your specific area when estimating your output.
The verdict
New Zealand has good solar resource — around 1,300–1,400 kWh per kW of panels each year in the main centres, comparable to or better than much of Europe. Output varies by region, with the upper North Island a little ahead and the South Island a little more seasonal, but solar generates well everywhere people live. Your roof’s orientation and shade, and how much of your own power you use, matter more to your return than which region you’re in. So “does solar work where I live?” almost always has the same answer: yes.
Get a free assessment and we’ll estimate output using your region’s actual sun data.
Sources: Regional solar irradiance and generation figures per NIWA and EECA; generation estimates vary by region, roof, and year.