Daily DNI Irradiance

Anyone knows about a method to obtain the Daily Direct Normal Irradiance (DNI) from Daily Global or Daily Direct Irradiance??


  • BB.BB. Super Moderators, Administrators Posts: 32,608 admin
    Re: Daily DNI Irradiance

    The PV Watts program has some listings for Chile/Santiago (+ three others)... The program is setup for solar electric--but you can get some monthly solar hours data--and you could back out the average daily solar irradiance from the detailed files.

    Here is a discussion how to download weather data for Santiago Chile--It may give you some ideas where you can obtain the data directly.

    What is it that you want to do exactly?

    Near San Francisco California: 3.5kWatt Grid Tied Solar power system+small backup genset
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