Solar Energy Potential in Kawerau, New Zealand

Kawerau, located in New Zealand's Bay of Plenty region at latitude -38.1019 and longitude 176.7046, offers varying potential for solar PV energy generation throughout the year. This Southern Temperate Zone location experiences significant seasonal fluctuations in solar energy production. The seasonal output from solar PV installations in Kawerau shows a clear pattern. Summer delivers the highest energy yield with 7.01kWh per day for each kilowatt of installed capacity. Spring follows with a respectable 5.21kWh/day, while autumn drops to 3.65kWh/day. Winter presents the greatest challenge with only 2.37kWh/day per installed kilowatt. This seasonal variation means Kawerau residents can expect nearly three times more solar energy production in summer compared to winter. December through February represent prime solar harvesting months, while June through August will require supplementary energy sources for most households relying on solar power.

Optimal Panel Installation

For fixed solar panel installations in Kawerau, the ideal tilt angle to maximize year-round energy production is 33 degrees facing North. This angle optimizes the annual solar capture by accounting for the sun's changing position throughout the year at this specific latitude.

Environmental Considerations

Several environmental factors could impact solar production in Kawerau:

• Volcanic activity: Kawerau sits within the Taupo Volcanic Zone, where occasional ash emissions from nearby volcanoes can temporarily reduce solar efficiency by coating panels with particulate matter.
• Geothermal activity: While beneficial for other renewable energy, the area's geothermal features can produce steam and hydrogen sulfide emissions that may gradually affect panel surfaces.
• Rainfall: The region receives moderate rainfall year-round, which can temporarily reduce production during precipitation events.

Preventative Measures

To maximize solar production despite these challenges, several preventative measures are recommended:

• Install self-cleaning panels or implement regular cleaning schedules to address volcanic ash or geothermal residue.
• Use high-quality panels with anti-reflective coatings and tempered glass that resist environmental contaminants.
• Consider microinverters or power optimizers to minimize production losses when portions of the array are affected by shading or contamination.
• Implement monitoring systems to quickly identify performance issues related to environmental factors.

With proper installation and maintenance, solar PV systems in Kawerau can provide substantial energy, particularly during the summer and spring months, while requiring supplementary energy sources during the less productive winter period.

Note: The Southern Temperate Zone extends from -35° latitude South down to -66.5° latitude.

So far, we have conducted calculations to evaluate the solar photovoltaic (PV) potential in 105 locations across New Zealand. This analysis provides insights into each city/location's potential for harnessing solar energy through PV installations.

Link: Solar PV potential in New Zealand by location

Solar output per kW of installed solar PV by season in Kawerau

Seasonal solar PV output for Latitude: -38.1019, Longitude: 176.7046 (Kawerau, New Zealand), based on our analysis of 8760 hourly intervals of solar and meteorological data (one whole year) retrieved for that set of coordinates/location from NASA POWER (The Prediction of Worldwide Energy Resources) API:

 

Ideally tilt fixed solar panels 33° North in Kawerau, New Zealand

To maximize your solar PV system's energy output in Kawerau, New Zealand (Lat/Long -38.1019, 176.7046) throughout the year, you should tilt your panels at an angle of 33° North for fixed panel installations.

As the Earth revolves around the Sun each year, the maximum angle of elevation of the Sun varies by +/- 23.45 degrees from its equinox elevation angle for a particular latitude. Finding the exact optimal angle to maximise solar PV production throughout the year can be challenging, but with careful consideration of historical solar energy and meteorological data for a certain location, it can be done precisely.

We use our own calculation, which incorporates NASA solar and meteorological data for the exact Lat/Long coordinates, to determine the ideal tilt angle of a solar panel that will yield maximum annual solar output. We calculate the optimal angle for each day of the year, taking into account its contribution to the yearly total PV potential at that specific location.

Seasonally adjusted solar panel tilt angles for Kawerau, New Zealand

If you can adjust the tilt angle of your solar PV panels, please refer to the seasonal tilt angles below for optimal solar energy production in Kawerau, New Zealand. As mentioned earlier, for fixed-panel solar PV installations, it is optimal to maintain a 33° North tilt angle throughout the year.

Overall Best Summer Angle	Overall Best Autumn Angle	Overall Best Winter Angle	Overall Best Spring Angle
22° North in Summer	43° North in Autumn	53° North in Winter	31° North in Spring

Our recommendations take into account more than just latitude and Earth's position in its elliptical orbit around the Sun. We also incorporate historical solar and meteorological data from NASA's Prediction of Worldwide Energy Resources (POWER) API to assign a weight to each ideal angle for each day based on its historical contribution to overall solar PV potential during a specific season.

This approach allows us to provide much more accurate recommendations than relying solely on latitude, as it considers unique weather conditions in different locations sharing the same latitude worldwide.

Calculate solar panel row spacing in Kawerau, New Zealand

We've added a feature to calculate minimum solar panel row spacing by location. Enter your panel size and orientation below to get the minimum spacing in Kawerau, New Zealand.

Our calculation method

1. Solar Position:
   We determine the Sun's position on the Winter solstice using the location's latitude and solar declination.
2. Shadow Projection:
   We calculate the shadow length cast by panels using trigonometry, considering panel tilt and the Sun's elevation angle.
3. Minimum Spacing:
   We add the shadow length to the horizontal space occupied by tilted panels.

This approach ensures maximum space efficiency while avoiding shading during critical times, as the Winter solstice represents the worst-case scenario for shadow length.

Topography for solar PV around Kawerau, New Zealand

Kawerau sits in the eastern Bay of Plenty region on New Zealand's North Island, nestled within a complex and diverse topographical landscape. The town is positioned in a valley surrounded by notable geological features that define its character and climate patterns.

Surrounding Landscape

The terrain around Kawerau is characterized by rolling hills that transition into more dramatic mountainous features. To the south and east rise the formidable Urewera Ranges, creating a significant topographical barrier. The landscape has been shaped by extensive volcanic activity, with the town situated within the Taupo Volcanic Zone - one of New Zealand's most geothermally active regions. Nearby Mount Edgecumbe (Putauaki), a dormant volcano standing at 820 meters, dominates the skyline and serves as a cultural landmark for the region. This conical peak creates distinctive microclimates and weather patterns in its vicinity. The Tarawera River winds through the area, having carved valleys over geological timeframes. This waterway flows northward from Lake Tarawera through Kawerau before eventually reaching the Bay of Plenty coast, creating alluvial plains in parts of the surrounding landscape. The elevation around Kawerau varies considerably, from approximately 30 meters above sea level in the town center to several hundred meters in the surrounding hills. This variation creates numerous aspects and slopes throughout the region.

Solar PV Potential Areas

For large-scale solar photovoltaic development, several nearby areas present favorable conditions based on topographical considerations: The northern approaches to Kawerau feature more gently sloping terrain with favorable north-facing aspects. These areas receive consistent solar exposure throughout the day due to fewer topographical obstructions and would require minimal earthworks for installation. The elevated plateaus to the northeast of the town offer particularly promising locations. These areas sit above the morning fog that sometimes settles in the valley floors, ensuring more consistent solar exposure. The relatively flat nature of these plateaus would simplify construction and minimize shading issues. Areas along the western corridor toward Rotorua, particularly where land has already been cleared for agricultural purposes, present opportunities where the topography is amenable to large installations. These locations feature gradual slopes with predominantly northerly aspects that maximize solar exposure in the Southern Hemisphere. The industrial zones within and immediately surrounding Kawerau also merit consideration. While not strictly a topographical advantage, these areas often feature large, flat rooftops and brownfield sites that could be repurposed for solar installations without significant land modification requirements. It's worth noting that while the mountainous areas to the south receive abundant sunshine, their steep slopes and difficult access make them less practical for large-scale development despite their elevation potentially placing them above cloud cover more frequently. The volcanic soil composition throughout much of the region provides good stability for ground-mounted systems, though careful geotechnical assessment would be necessary given the area's seismic and geothermal activity.

New Zealand solar PV Stats as a country

New Zealand ranks 78th in the world for cumulative solar PV capacity, with 146 total MW's of solar PV installed. Each year New Zealand is generating 29 Watts from solar PV per capita (New Zealand ranks 58th in the world for solar PV Watts generated per capita). [source]

Are there incentives for businesses to install solar in New Zealand?

Yes, there are several incentives for businesses wanting to install solar energy in New Zealand. The government offers a range of grants and subsidies to help businesses reduce their energy costs and increase their use of renewable energy sources. These include the Solar PV Grant Scheme, which provides up to $20,000 per installation towards the cost of installing solar photovoltaic (PV) systems; the Low Emission Vehicles Contestable Fund, which provides funding for electric vehicles; and the Energy Efficiency and Conservation Authority’s Business Energy Management Programme, which helps businesses identify ways to save money on their energy bills. Additionally, some local councils offer rates rebates or other incentives for businesses that install solar panels.

Do you have more up to date information than this on incentives towards solar PV projects in New Zealand? Please reach out to us and help us keep this information current. Thanks!

Citation Guide

Article Details for Citation

Tell Us About Your Work

We love seeing how our research helps others! If you've cited this article in your work, we'd be delighted to hear about it. Drop us a line via our Contact Us page or on X, to share where you've used our information - we may feature a link to your work on our site. This helps create a network of valuable resources for others in the solar energy community and helps us understand how our research is contributing to the field. Plus, we occasionally highlight exceptional works that reference our research on our social media channels.

Feeling generous?

Share this with your friends!

Compare this location to others worldwide for solar PV potential

The solar PV analyses available on our website, including this one, are offered as a free service to the global community. Our aim is to provide education and aid informed decision-making regarding solar PV installations.

However, please note that these analyses are general guidance and may not meet specific project requirements. For in-depth, tailored forecasts and analysis crucial for feasibility studies or when pursuing maximum ROI from your solar projects, feel free to contact us; we offer comprehensive consulting services expressly for this purpose.

Helping you assess viability of solar PV for your site

Calculate Your Optimal Solar Panel Tilt Angle: A Comprehensive Guide

Enhance your solar panel's performance with our in-depth guide. Determine the best tilt angle using hard data, debunk common misunderstandings, and gain insight into how your specific location affects solar energy production.