PRE INSPECTION
• Are there tall trees or buildings that would shade the unit for all or part of the year? If so, the unit will not
function properly or perhaps even at all. The solar panels should be located in an unshaded position on the roof
at an angle which is as close as possible to the latitude position of the installation.
• Are there young trees or planned buildings that will shade a unit in the future? The homeowner should be made
aware that future shading of the panels will reduce the efficiency of the system.
• Is it possible to have the unit facing north or close to north? The panels should be located on a North facing
roof.
C. SYSTEM SIZING
C1. SOLAR HOT WATER SYSTEMS
OZS251E OZS252E OZS301E OZS302E OZS402E OZS403E
Water Tank 250 Litre 250 Litre 300 Litre 300 Litre 400 Litre 400 Litre
Solar Collectors 1 2 1 2 2 3
Booster Electric Electric Electric Electric Electric Electric
C1. STORAGE TANKS
The size of the system involves the sizing of two components:
- hot water storage tank
- number of collectors
The number of litres of hot water used daily is the first calculation that needs to be made. This will vary enor-
mously from family to family, a good estimate is 60 to 80 litres of hot water per person per day.
HOUSE NUMBER SUGGESTED SUGGESTED
SIZE PEOPLE TANK SIZE TANK P/N
1–2 bedrooms 1–2 250 litres 31.100.100
3 bedrooms 3–4 300 litres 31.100.101
4–6 bedrooms up to 6 400 litres 31.100.102
C2. COLLECTORS
Our Collectors have been specifically designed for optimal performance. Our Collectors are manufactured using
high quality materials. Each Collector has 8 x 10mm copper tube risers. Each Riser tube is welded to a high
efficiency TINOX coated fin to maximize absorption of heat from the sun and transmission of heat into the
water. The risers are welded to 22mm copper header pipes at the top and bottom to make a copper tube grid
which is encased in thick rockwool insulation. A special 4mm thick high impact glass is fitted to the front of the
Collector, an aluminium plate is fitted to the back and the Collector is fitted with a durable corrosion resistant
aluminium frame.
The very rough rule of thumb is that a 1m2 area of collector is required per person plus 1m2 for each major
appliance (e.g. dishwasher, washing machine) using hot water from the solar system. Our solar collectors are
approximately 2m2 in area.
The area of collectors required will be affected by shade particularly between 9am and 3 pm, whether the col-
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