Company Holiday

Our offices will be closed on Monday 21st June for a company holiday. We are giving everyone the day off to say thank you for their commitment, dedication and hard work throughout the COVID-19 pandemic.

Our offices will reopen as usual on Tuesday 22nd June.

How is solar irradiance measured?

Solar irradiance meters that assess PV modules must have a spectral response close to that of a PV module in order to measure ‘true irradiance’ as a PV system would.

There are two irradiance measurement methods defined and accepted by international standards covering the performance measurement of PV systems:

1. Pyranometer
High precision, high cost instruments using thermal sensors in a glass dome.

2. PV Reference Cell
Effectively a small scale version of a PV module, having the same response to solar energy.

Temperature compensation ensures accuracy is not affected by heat. Devices such as light meters, lux meters or devices using photo diode sensors do not have the same spectral response as a PV module, they do not compensate for temperature and are likely to introduce significant measurement errors if used for solar PV applications. They are not suitable for use on PV systems

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