Solar & Battery Design Tools for New Zealand Design Systems, Calculate ROI & Find Installers
Design solar and battery systems across New Zealand using Photonik's professional design platform. New Zealand enjoys good solar potential, particularly in the upper North Island and the sunny Nelson-Marlborough region. With electricity prices continuing to rise, more Kiwi homeowners are discovering that solar panels can deliver meaningful savings and greater energy independence.
Solar Design New Zealand
Energy Usage
Energy bills in New Zealand add up quickly — with 25 kWh of daily consumption, solar can make a real difference to your monthly costs. With electricity prices trending upward, even small reductions in your 25 kWh daily consumption can noticeably lower your bills — and solar takes this further by offsetting much of what you do use.
Simple changes like sealing draughts, upgrading to LED lighting, and setting hot water timers often cost far less than extra solar panels and deliver immediate bill savings.
Typical energy usage per person per day in New Zealand:
Note: Actual usage varies depending on property size, building efficiency, climate, and appliances.
Solar System Sizing
A 6.6kW system covers average consumption, but sizing slightly larger can help offset seasonal dips and future increases in usage from EVs or heat pumps. For best results, size your system between 9.9kW and 13.2kW to account for fluctuations in solar output throughout the day and year.
While June is the weakest month for solar in New Zealand, February more than makes up for it — and a battery can help bridge the gap between seasonal highs and lows.
Solar & Energy Savings
Calculate Heat Pump & EV Savings
Electrify your home by replacing gas heating, petrol vehicles, and other fossil fuel appliances with electric alternatives powered by clean solar energy. This delivers significant additional financial savings and substantial carbon emission reductions. Our calculator helps you compare costs and model the financial impact of switching to electric appliances and vehicles.
How Solar Reduces Your Electricity Bills
The calculations below show how your electricity bills change with solar. Your Old Bill of - per month (- annually) is calculated from your total energy consumption multiplied by the grid electricity rate. Your New Bill of - per month (- annually) accounts for solar generation, the percentage you use directly (self-consumption), remaining grid consumption, and feed-in credits for excess energy exported to the grid. This results in monthly savings of - (- annually).
Battery Storage New Zealand
Solar Battery Sizing
Even without a battery, 50% self-sufficiency from a 9.9 kW system in New Zealand means a significant reduction in your electricity bills. Installing a 10 kWh battery boosts your energy independence to around 86% per year, cutting grid dependency down to 14%.
Accurate battery savings and ROI require the full Photonik design platform for comprehensive calculations.
Energy Self Sufficiency Calculator*
*Note: This calculator provides simplified battery self-sufficiency estimates. For accurate per-hour simulations that account for solar generation patterns, consumption timing, battery charging/discharging cycles, and efficiency losses across all seasons, use the full Photonik design tool.
Panel Placement Tool New Zealand
This is a simple panel placement tool that lets you quickly estimate panel count for a single roof area. Try Photonik for advanced features:
- Multiple panel groups
- Custom roof angles
- Panel orientation
- Shade loss calculations
- Panel selection (1000+ models)
- Full integration with our design tool
Loading panel placement tool...
Solar & Battery System Cost New Zealand
Understanding Solar & Battery System Costs
A 9.9 kW solar system in New Zealand is priced at approximately $14,577, whilst adding 10 kWh of battery storage increases the total investment to around $25,036. With a 7.3-year payback and a 25-year panel lifespan, a solar system in New Zealand can deliver many years of essentially free electricity after paying for itself.
Try adjusting the system size and battery sliders above to see how different configurations affect both upfront cost and long-term savings for your New Zealand home.