Calculated Weather Conditions

Questions
#1

In the Help section is a item explaining how the weather conditioning can be determined automatically. This explanation ends with:

Blockquote
If the system has Estimated output data the conditions calculations are based on the percentage of the estimated output -

  • Greater than 90% - Fine
  • 60% to 90% - Partly Cloudy
  • 40% to 60% - Mostly Cloudy
  • 20% to 40% - Cloudy
  • Less than 20% - Showers
    When a system produces 90% or more output than the daily estimate, the condition assigned would be ‘Fine’. This gives the flexibility to handle seasonal variations in output for individual systems.

I don’t understand what is meant with that last sentence.

#2

The weather condition entry is affected by the system’s monthly estimated production numbers.

#3

Thanks for your answer, but I still don’t understand this last sentence.

#4

An estimate of 5.0kWh/kW in a summer month and the actual amount of 4.5kWh/kW or greater i.e. 90% then the condition will be ‘Fine’.

In a winter month an estimate of 2.0kWh/kW with actual of 1.8kWh/kW or greater would still result in ‘Fine’.

#5

It’s probably my lousy understanding of English, but I still don’t get what is meant with that last sentence “This gives the flexibility to handle seasonal variations in output for individual systems.”

#6

You cannot use an absolute value in kilowatt hours to estimate the weather because, during winter, a system produce much less energy than in summer. So, the threshold value for what constitutes “good” weather is taken as a percentage of the expected output of the system for that time of year.

1 Like
#7

Thanks for the clear explanation, now I understand!