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Featured graphic for a New Zealand solar sizing guide, showing the formula panel watts equals daily watt-hours divided by winter peak sun hours times 0.75, a monthly sun-hours chart with June and July highlighted as the months to size for, and a solar panel wired to a battery.

What Size Solar Panel and Battery Do I Need? NZ Calculator and Worked Examples

William September 29, 2026

Size a solar panel, battery and charge controller for a bach, shed, van, camera or Starlink Mini with monthly sun data for nine NZ centres, plus EECA figures on home solar cost and payback.

Illustration of a home energy dashboard showing live power use and an hourly usage chart, above a smart meter and a switchboard with a CT clamp on the main cable, next to the title "Home Energy Monitoring in NZ".

Home Energy Monitoring in NZ: Smart Meter Data, CT Clamps and Home Assistant

William September 29, 2026

Where does your power go? How NZ households can monitor energy use with smart-meter data, smart plugs and CT clamp monitors, what needs an electrician, and a free running-cost calculator.

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What Size Solar Panel and Battery Do I Need? NZ Calculator and Worked Examples

Home Energy Monitoring in NZ: Smart Meter Data, CT Clamps and Home Assistant

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