[werk_ag]

... pois aqui na região o valor de radiação solar é 5 kW/m2 ...

5kW/m2 = 5000W / m2

Desculpe, mas esse valor deve ser relativo a uma média diária, e não a uma medição instantânea.
Tanto quanto sei, um valor destes não se observa em nenhum lugar na terra e tambem não conheço nenhum piranometro que vá além dos 1600 W/m2.


Average annual solar radiation arriving at the top of the Earth's atmosphere is roughly 1361 W/m2.[6] The radiation is distributed across the electromagnetic spectrum. About half is infrared light.[7] The Sun's rays are attenuated as they pass through the atmosphere, leaving maximum normal surface irradiance at approximately 1000 W /m2 at sea level on a clear day. When 1361 W/m2 is arriving above the atmosphere (when the sun is at the zenith in a cloudless sky), direct sun is about 1050 W/m2, and global radiation on a horizontal surface at ground level is about 1120 W/m2.[8] The latter figure includes radiation scattered or reemitted by atmosphere and surroundings. The actual figure varies with the Sun's angle and atmospheric circumstances. Ignoring clouds, the daily average insolation for the Earth is approximately 6 kWh/m2 = 21.6 MJ/m2.

Fonte: https://en.wikipedia.org/wiki/Solar_irradiance