Sun irradiation forcast

[Forall 2]

Hi, Is there anyone here who has any good ideas on how to get the forecast of sun irradiation for at least today? The best would be, e.g.Watt/m², but if I can only get which hours the sun is up and the sky is clear, that would also be very helpful. Would like to use this to direct some of my loads to either when the electricity price is low or at least when the sun is shining and the solar panels are producing. (I unfortunately have Sungrow and seem not to be able to collect their internal data in any easy way)

 

Best regards,

Daniel

[petro_cz 25]

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/monthly_2023_10/image.png.f0b8eefd5ab054029dbfdb347a1830a4.png" /> hello in the Czech Republic I use this api, it's free, I don't know where you want to use it, I have forecasts for today, tomorrow and the day after

[Tim__ 114]

API for Australian data

 

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[pflugj 13]

another one:

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[Forall 2]

I feel very stupid but how would you get this into fibaro? could I create "units" that represent each timepoint next 24 hours or so?

[Tim__ 114]

Solcast actually covers the globe, and their API documentation seems pretty good. Send a URL, and get a JSON, CSV or HTML response. Free hobbyist account (up to 10 requests per day). You'll need LUA and JSON coding skills. I'd suggest you run a script in the early morning, that retrieves forecasted values for certain times in the day, and store these as global variables. Other scenes can then use those variables to make decisions about what appliances to turn on.

[Forall 2]

I just want to share the final solution, It may not the neatest but it seems to work: It is a Quick APP and need the variables SolarForecast_[1-23]h resp Tomorrow_SolarForecast_[1-23]h
 

-- QuickApp variables

local apiKey = " "

local apiURL = " " .. apiKey

local emailDeviceID = 2, 1 -- Replace with your actual email device ID

 

function QuickApp:onInit()

    self:debug("QuickApp init")

    self.http = net.HTTPClient({ timeout = 6000 })

    self:updateProperty("log", "QuickApp started")

    self:run() -- Initial run

end

 

function QuickApp:run()

    self.http:request(apiURL, {

        options = {

            method = 'GET',

            headers = {}

        },

        success = function(response)

            if response.status == 200 then

                self:parseForecastData(response.data)

            else

                self:debug("Failed to fetch forecasts. Status code:", response.status)

                self:sendErrorEmail("Failed to fetch forecasts. Status code: " .. response.status)

            end

        end,

        error = function(error)

            self:debug("Failed to fetch forecasts. Error:", error)

            self:sendErrorEmail("Failed to fetch forecasts. Error: " .. error)

        end

    })

end

 

function QuickApp:parseForecastData(data)

    local forecastData = json.decode(data)

    if forecastData and forecastData.forecasts then

        local currentDate = os.date("!%Y-%m-%d") -- Current date in UTC

        local tomorrowDate = os.date("!%Y-%m-%d", os.time() + 86400) -- Tomorrow's date in UTC

 

        for _, forecast in ipairs(forecastData.forecasts) do

            local periodEndUTC = forecast.period_end

            local forecastDate = string.sub(periodEndUTC, 1, 10) -- Extract date from period_end

            local hour = string.sub(periodEndUTC, 12, 13) -- Extract hour from period_end

            local variableNamePrefix = forecastDate == currentDate and "SolarForecast_" or forecastDate == tomorrowDate and "Tomorrow_SolarForecast_" or nil

 

            if variableNamePrefix then

                local variableName = variableNamePrefix .. tonumber(hour) .. "h"

                fibaro.setGlobalVariable(variableName, tostring(forecast.pv_estimate))

            end

        end

        self:debug("Forecast data updated successfully.")

    else

        self:debug("Invalid or empty forecast data received.")

        self:sendErrorEmail("Invalid or empty forecast data received.")

    end

end

 

function QuickApp:sendErrorEmail(errorMessage)

    -- Sending email using the specified email device ID

    fibaro.call(emailDeviceID, "sendEmail", "Solar Forecast QuickApp Error", errorMessage)

    -- Replace "sendEmail" with the correct action name if different for your email device or scene

    self:debug("Error email sent: " .. errorMessage)

end

 

Thanks ChatGTP....

Edited March 23 by Forall