Residential Solar
Solar Panel Roof Requirements in NZ: A 2026 Suitability Guide
What decides whether a roof suits solar: orientation, pitch, cladding, shading, usable area and roof age, and how each one changes the desig...
Solar Calculator
Calculate your solar savings in 60 seconds
Tell us about your property and energy usage, and we'll estimate how much you could save with solar — plus the right system size for your home.
Your solar savings estimate
Answer a few questions and we'll calculate your potential savings and recommended system size.
Typical Results
What NZ homeowners are saving with solar
These are typical results for Auckland homes. Your actual savings depend on roof orientation, usage pattern, and system size.
Small Home
$1,500/yr
estimated savings
System size4 kW
Panels9 panels
Annual output5,200 kWh
Bill reduction~55%
Payback~5.5 years
MOST COMMON
Average Home
$2,800/yr
estimated savings
System size6.6 kW
Panels15 panels
Annual output8,600 kWh
Bill reduction~70%
Payback~4.5 years
Large Home
$4,200/yr
estimated savings
System size10 kW
Panels22 panels
Annual output13,000 kWh
Bill reduction~80%
Payback~4 years
Why Trust These Numbers
Based on real NZ solar data
Our estimates are based on NIWA solar irradiance data for your region, real electricity rates from major NZ retailers, and performance data from our 500+ installations.
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NIWA solar data
Region-specific irradiance levels for accurate output estimates
Region-specific irradiance levels for accurate output estimates
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Current electricity rates
Based on actual retailer pricing, not outdated averages
Based on actual retailer pricing, not outdated averages
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Real installation data
Performance benchmarks from our existing NZ installations
Performance benchmarks from our existing NZ installations
Solar Savings Insights
Costs, ROI, and real numbers for NZ households.
Residential Solar
How Many Solar Panels Do I Need in NZ? A 2026 Sizing Guide
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Residential Solar
Solar Panels NZ (2026): Cost, Efficiency, and How to Choose
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Want exact numbers for your property?
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