We Are Fortunate
New Zealand has a very high solar irradiation available.
Even the coldest parts of South Island have 30% more irradiation than Central Europe.
The Optimum Roof Orientation
Collector panels should face North ±45⁰.
Northwest is better than the Northeast.
Any orientation is possible with a pitched frame.
Inclination
Collector panels must be ±20⁰ off latitude (except for solar pool panel that can be flat).
The steeper roof will achieve better winter performance.
Shading
Avoid shading between 10 am and 3 pm.
Maintain bush and trees where possible.
The More You Use, The More You Save
For solar water heating, higher usage of hot water makes the system more cost-effective.
With solar power, the usage of energy during the daytime makes the system more cost-effective.
About solar pool heating, passive solar and pool cover improve system efficiency.
Site-Specific Performance
Our Solar consultants are trained to provide you with the exact answer to what your roof solar capacity is.
This analysis is based on NZS4234:2008, and the particular site and energy usage.
