The solar index calculates how good the conditions are for solar power generation by considering both cloud cover and the sun's position in the sky. Instead of treating all daylight hours equally, it recognizes that solar panels produce more power when the sun is high in the sky (around noon) and less power during early morning or late evening hours, even if the sky is equally clear. This is achieved by applying a multiplier that peaks at solar noon (halfway between sunrise and sunset) and gradually decreases as you move towards sunrise or sunset, similar to how the sun's intensity naturally varies throughout the day.

A seasonal multiplier is applied to account for temperature effects on panel efficiency:

• Higher efficiency in winter (multiplier up to 1.1)
• Lower efficiency in summer (multiplier down to 0.9

This helps balance out the shorter winter days.

A latitude multiplier is applied which considers:

• The cosine effect of latitude on solar radiation
• Seasonal variations in sun angle
• A minimum threshold to avoid overly pessimistic values at high latitudes

The Wind Index measures the suitability of wind conditions for energy generation. It is based on wind speed, with moderate to strong winds contributing positively to wind power generation. However, extremely high wind speeds may not always be beneficial, as some wind turbines shut down in storm conditions. The index provides an averaged value for a given area over a specific forecast period.