Written by
Kristy Hoare, Founder & Solar Market Research Specialist
Last updated:
A Simple NZ Guide
Thinking about installing solar panels in New Zealand but not sure if it’s worth it? Here’s everything you need to know in this one infographic below.
View the text version below:
1. How Solar Power Works
Solar panels convert sunlight into electricity for your home. During the day, your system powers your appliances first, and any extra energy is either sent back to the grid or stored in a battery for later use.
2. Typical Solar Costs in NZ
A typical 8kW solar-only system costs around $15,500 fully installed (including GST), which is about the size Kiwis are putting on their homes. Smaller homes can start from around $7,000 for 3kW, while bigger households with higher power use might look at 10kW for around $19,000. See solar prices in NZ for every system size.
| System size | 500W panels | Home profile | Installed price | Estimated payback |
|---|---|---|---|---|
| 3.5kW | 8 | Small home or 1-2 people, modest appliances | $8,000 | About 10 years |
| 6kW | 12 | Typical new NZ install - family home, 3-4 people, heat pump | $12,000 | About 7 years |
| 10kW | 20 | Large household, high power use (EV, spa pool etc) | $19,000 | About 7 years |
Prices are fully installed, including GST, from our survey of 151 verified installs. Payback figures are median installer estimates from 279 residential solar quotes in 2026. Every home is different, so each project needs its own quote.
3. Solar Power Savings
Installing solar can reduce your power bills by 40–70%, depending on when you use electricity and how much sunlight your home gets. Our 2026 quote data puts estimated savings from a typical solar-only system at around $2,475 a year. Adding a solar battery can increase those savings by storing energy for night-time use.
4. Solar Payback Period
Based on 279 residential solar quotes from 2026, the median estimated payback is 6.9 years for solar alone, or around 9 years with a battery. Systems under 5kW tend to take longer, at around 11 years, because the fixed costs are much the same whatever the size. After that, you’re generating cheaper power for years to come. See the full 2026 payback data.
5. Selling Power Back to the Grid
When your panels produce more power than you use, you’ll earn a small buy-back credit from your power retailer. Rates vary between 8–17 c/kWh, depending on who you’re with.
6. Is Solar Power Worth It for You?
If you:
- Own your home
- Have a north, east or west-facing roof with at least 10 m² of clear space
- Spend $150+ per month on power
Then solar’s likely a smart move. It can cut bills, boost your home’s value, and lock in long-term energy independence.
7. Solar Batteries — Optional but Powerful
Batteries are optional, but they’re great if you use more power at night or want backup during power cuts. A typical 11kWh battery costs around $13,000 installed, with most buyers paying between $10,000 and $16,500. A battery stretches the median payback from about 7 years to 9, but adds peace of mind and helps you use more of your own solar. If budget’s tight, start with panels now and ensure your system’s battery-ready for the future.
8. Paying for Solar
You don’t need the full amount sitting in the bank to go solar. Most of the big NZ banks offer low-interest green loans for solar panels and batteries, usually as a top-up to your home loan:
- Westpac: 0% for up to 5 years, up to $50,000
- ANZ, ASB and BNZ: 1% fixed for 3 years, up to $80,000
- Kiwibank: standard home loan rate, plus up to $2,000 cashback
You’ll usually need your mortgage with that bank, a formal installer quote and a SEANZ-member installer. Check what rate applies once the low-interest period ends, as offers can change. Compare NZ solar finance options.
Ready to See What You Could Save?
Use our free solar calculator to estimate your potential savings, or, if you’re ready to get started, get 3 free quotes from trusted, quality installers across New Zealand.
