New Zealand Solar Association shows more than 85% of Solar
malfunction is related to installation practices and not product defects.

Critical Installation Aspects:
Safety practices, safety gear & safety accreditations such as Site Safe
A Building Consent or an exemption for Solar Water Heating
Connection permit from Line Company for Solar Power
Customer Assurance such as New Zealand Solar Association
Specific Professional Accreditation
Clear & detailed Installation Instructions and maintenance
Careful selection of sub contractors

Thinking Durability:
Careful material selection to last 15 years while exposed to the elements

Material need to withstand:
Very high temperature
Very low temperature
Wetness e.g. Electrical components be at least IP65 Code
Purposely built for Weather Tightness
Corrosion when in contact with other roof elements – G12/AS2 p45
Extreme UV – check for UV rating certificate



  1. Identify the wind zone, seismic rating and snow load of the site
  2. Follow the minimum requirements of manufacturer
  3. Avoid or minimise building’s high-pressure wind zone
  4. Follow the guidance of G12/AS2 p43 or get a site-specific PS1
  5. Use robust fixing method to specific roofs when integrating
    with roof structure
High Pressure Wind Zone

High Pressure Wind Zone


Solar Pool Heating panels can be installed flat on the roof for
seasonal usage.
Solar PV panels should face within 600 of North with a minimum
100 inclination
Solar Water Heating panels should face within 600 of North
with a minimum 200 inclination

table installation


Shading should be avoided especially between 9am and 3pm.
Refer to the specific solar sections for more details and to
SunCalc and NIWA Solar View Calculator

shading solar panel installation