Surface Solar Radiation

Daily total solar surface energy

Solar energy on south facing horizontal to vertical tilted surfaces on the northern hemisphere latitude 0^oN, 30^oN and 60^oN are indicated in the diagrams below.

Solar Radiation - Latitude 0^oN

• 1 MJ = 0.278 kWh = 239 kcal = 948 Btu
• 1 m² = 1550 in² = 10.764 ft²

Solar Radiation - Latitude 30^oN

Solar Radiation - Latitude 60^oN

The implication of this are that at equator there may be enough radiation in the winter to consider year-round applications. In the northern hemisphere we have to look for applications that require energy mainly in summer. 

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