Units of Measurement
Direct insolation is measured in (W/m²) or kilowatt-hours per square meter per day (kW·h/(m²·day)).
- 1 kW·h/(m²·day) = 1,000 W · 1 hour / ( 1 m² · 24 hours) = 41.67 W/m²
In the case of photovoltaics, average direct insolation is commonly measured in terms of peak direct insolation as kWh/(kWp·y) (kilowatt hours per year per kilowatt peak rating)
Read more about this topic: Direct Insolation
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