The 6.6kW solar system is the classic starting point for New Zealand homeowners — big enough to make a real dent in a typical power bill, without needing a large roof or a big commitment. Here's what a 6.6kW system actually delivers, and how to know if it's the right size for your home.
What Is a 6.6kW Solar System?
A 6.6kW system is made up of around 15 solar panels (using modern ~440W Tier 1 panels) and needs roughly 33–40 m² of suitable roof space. The "6.6kW" figure is the combined peak output of the panels; it pairs neatly with a 5kW inverter, which is why it has become such a common residential size.
How Much Power Does a 6.6kW System Generate?
As a rule of thumb, a well-sited system in New Zealand generates around 3.9 kWh per day for every kilowatt installed, averaged across the year. That puts a 6.6kW system at roughly 26 kWh per day, or about 9,400 kWh a year — noticeably more in summer and less in winter. Your actual output depends on your location, roof orientation, tilt and any shading, which is why we always design from an on-site assessment rather than a satellite guess.
Who Is a 6.6kW System For?
A 6.6kW system suits the average New Zealand family home with moderate daytime power use — think a household that runs a heat pump, hot-water cylinder and the usual appliances. If someone is home during the day, or you shift laundry and dishwashing to daylight hours, you'll self-consume more of what you generate and get the most value from the system.
Getting the Most From Your 6.6kW System
Solar is most valuable when you use the power you make. Anything you don't use is exported to the grid for a retailer buy-back rate, which varies between power companies. Adding a home battery lets you store the sunshine you generate at midday and use it in the evening peak — and keeps your essentials running through an outage.
How Much Does a 6.6kW System Cost?
Every home is different — your roof, your switchboard, your power use and whether you add a battery all change the design. Rather than quote a headline price that may not fit your situation, we put together a tailored quote after a proper assessment, with $0 upfront options available. Get your free, no-obligation quote and we'll confirm whether 6.6kW is the right size for you.
Not sure a 6.6kW system is big enough? Compare it with our 8kW, 10kW and 13.2kW guides, or read our complete solar system sizing guide.