Here's a table about the daily average peak sun hours in South Africa.
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Peak sun hours (South Africa)
| Rank | Province | Daily Average Peak Sun Hours (Solar irradiance kWh/m2) |
|---|---|---|
| 1 | Northern Cape | 6.2 hours |
| 2 | North West | 5.9 hours |
| 3 | Free State | 5.8 hours |
| 4 | Gauteng | 5.5 hours |
| 5 | Limpopo | 5.4 hours |
| 6 | Mpumalanga | 5.4 hours |
| 7 | Western Cape | 5.4 hours |
| 8 | Eastern Cape | 5.2 hours |
| 10 | KwaZulu-Natal | 4.9 hours |
Summary
- On average South Africa receives between 4.9 - 6.2 peak sun hours daily.
importance of peak sun hours
Solar panels are designed to produce their rated power rating under STC (standard test conditions), which are: 1 kWh of solar irradiance, 25°C (77°F) temperature, and 1.5 air mass.
1 Peak sun hour = 1 kWh/meter2 of sunlight intensity (solar irradiance).
Why consider peak sun hours?
- It helps to select the ideal size solar system for your house/RV rooftop to fulfill your electricity need.
- It helps to give an estimated output from solar panels.
how to use peak sun hours?
For example:
- Daily electricity need = 10kWh
- Daily average peak sun hours = 5
(10 kWh ÷ 5) x 1.3 = 2.6 kWh or 2600 watts
2600 / 300 watt solar panel = 8.6 (300 watt) solar plates requiredRelated Post: Solar Panel Output Calculator
peak sun hours map south Africa
Peak sun hours (south Africa): FAQs
Average peak sun hours in Pretoria
On average, Pretoria receives about 5.3 peak sun hours daily.
Average peak sun hours in Johannesburg
On average, Johannesburg receives about 5.4 peak sun hours daily.
Average peak sun hours in cape town
On average, cape town receives about 5.2 peak sun hours daily.
