Solar radiation "weather" prediction

[Peter460]

Is there a site that predicts future daily radiation levels for the next few days - much like a weather forecast. The ones I have come across are all paid for access ones - any free ones?

[sensij]

There is a graphical 6 day forecast available free here:

http://www.solarserver.com/service/solar-photovoltaic-power-forecast-for-worldwide-locations/pv-forecast-usa.html

I haven't done any work to see how accurate it is, the peak power estimate is a bit low but the scale from one day to the next ought to be OK. To get more useful data, you'd need to pay for access to their API:

https://content.meteoblue.com/en/products/meteoblue-api/solar/operation

Edit: Just noticed you are in Cape Town. The USA version of the site seems to work ok for your location. Here is the next 6 day forecast for a 5 kW system, north facing, 20 deg tilt:

capetown.GIF

[Peter460]

Thanks , nice
Peter

[Kleinero]

Solar radiation "weather" prediction

I think that's more the sun than the solar system as a whole..

[Peter460]

There is a graphical 6 day forecast available free here:

http://www.solarserver.com/service/solar-photovoltaic-power-forecast-for-worldwide-locations/pv-forecast-usa.html

I haven't done any work to see how accurate it is, the peak power estimate is a bit low but the scale from one day to the next ought to be OK. To get more useful data, you'd need to pay for access to their API:

https://content.meteoblue.com/en/products/meteoblue-api/solar/operation

Edit: Just noticed you are in Cape Town. The USA version of the site seems to work ok for your location. Here is the next 6 day forecast for a 5 kW system, north facing, 20 deg tilt:

[ATTACH=CONFIG]7726[/ATTACH]

Solarserver is not very accurate - it seems .