Solar power & backup power installation

Solar power and backup power installation in New Zealand

Updated 4 November 2026

A 3 kW home solar system in New Zealand costs about NZ$8,500 to NZ$11,500 including GST, and a 6.6 kW system about NZ$14,000 to NZ$15,000 fully installed, approximately, according to sellers' websites and EECA, November 2026. Describe your roof and power use in a request on BlaBlaPrice to get quotes from installers in your city.

Rules and what the figures include

The building regulator publishes guidance on solar power systems, including grid-connected systems. An Electricity Authority estimate puts a 4.4 kW system with about 10 to 11 panels at NZ$12,000 to NZ$13,000. Several installers quote including GST, so ask for the total, the warranty on the panels and the inverter, and whether a battery is included.

Season and sun

November is spring, and the sun is getting stronger. Summer from December to February gives the longest days and the most output, while winter from June to August brings the least sun. Ask for a start date in the request, and plan the work for spring or summer so the system is producing before the short winter days.

Units and the request

Give the system size in kilowatts (kW), the battery capacity in kilowatt-hours (kWh), and your average monthly power use in kWh from the bill. Say whether your supply is single-phase or three-phase, and whether you want to sell power back to the grid. Give the site address and your deadline, because installers quote on the roof and the switchboard.

Describe your system once in the BlaBlaPrice chat. The AI reads the request, asks for missing details and looks through sellers' websites and price lists in New Zealand, then shows the prices and businesses it found. Sellers registered on BlaBlaPrice reply in the chat with their own offer, and your contact details stay hidden until you choose to share them. For related work, see Electrical installation or Turnkey renovation.