A 10kW solar system is built for New Zealand homes with serious power needs — larger houses, high daytime use, EV charging, or anyone aiming for a high level of energy self-sufficiency. A 10kW inverter is the largest common single-phase inverter, with room to pair even more panels with it.
What Is a 10kW Solar System?
A 10kW system is roughly 22–23 Tier 1 panels and needs around 50–60 m² of suitable roof space. It runs comfortably on standard single-phase power — and because a 10kW inverter can be paired with up to 13.3kW of panels (the maximum 33% oversize allowed on single phase without a battery), there's real headroom to size the array up if your roof and usage suit. Add a battery and you can go larger again.
How Much Power Does a 10kW System Generate?
Using the New Zealand guide of about 3.9 kWh per day per kilowatt, a 10kW system generates roughly 39 kWh per day averaged across the year — around 14,200 kWh annually. That's enough to cover a big household's daytime use with plenty left over to charge an EV or fill a battery.
Who Is a 10kW System For?
A 10kW system suits large homes, families with high energy use, and households charging one or more EVs. It's also ideal if you want to pair solar with a sizeable battery and run much of your home on your own power. If your daytime use is modest, a smaller system may give a better return — we'll be honest about that.
Getting the Most From Your 10kW System
With a system this size, a home battery is often where the real value sits: storing your midday surplus for the evening peak instead of exporting it for a lower buy-back rate. Timing EV charging and hot-water heating for daylight hours lifts your self-consumption even further.
How Much Does a 10kW System Cost?
A 10kW installation depends heavily on your roof, phase supply, switchboard and battery plans, so we quote each one individually rather than publishing a flat price — with $0 upfront options available. Get a tailored quote and we'll confirm whether your property suits a 10kW system.
Comparing options? See our 6.6kW, 8kW and 13.2kW guides, or read the full solar system sizing guide.