Solar Collector Inclination
Angle of Inclination
Difference between Local Latitude and Roof Angle

The most desired angle of Inclination to mount the solar collector is the local Latitude. Positive difference between Latitude and Roof angle results better system performance in winter. Lower Solar Collector mounting angle than the local Latitude will result in greater system performance in summer.
Variations of Solar Collector tilt angle for architectural reasons can be compensated with additional Thermomax tubes.

45 Thermomax tubes will supply hot water requirement of the above example by following Thermomax suggestions. For best result a 375 liters solar hot water storage tank should be used.

In the following four pages we are going to size a solar water heating system for a family of five. They have a hot water requirement of 50 liters per day, per person, with a local Annual Insolation of 1400 hours. Orientation of the roof is 30° West of South. The local Latitude is 45° and the roof angle 35° (inclination difference 10°). If your property is located in the US, go directly to US Insolation Charts.

• Hot Water Consumption and Storage Capacity

• Solar Insolation

• Orientation

• Inclination