Solare Datensysteme Solar-Log - Manual (Page 184)

184
Direct Device Configurations (Solar-Log 1000)
26�8 Defining the solar plant's forecast data
By setting forecast values for the yield data, you can check on the graph whether the plant is reaching the
desired annual yield or not.
To do this, a percentage rate is allocated to each month. This is deduced from the yield statistics over the
previous years.
Solar-Log 1000 always calculates the target value cumulatively, per day. This means that, at the beginning
of the month, it is not the total monthly target that is set, but the target for days already passed, plus that
of the current day.
In the forecast, Solar-Log 1000 also takes account of the yields in all previous years, and in this way can
allow for local weather events (in most cases, snow in December). The yearly forecast is therefore usually
fairly accurate by September.
All the dialog boxes apply only to the inverters that have been selected.
To define the forecast data:
•
Select the Config./Basic/Forecast menu
The dialog for entering forecast data is displayed.
•
Defining inverter / plant groups and feed-in
Dialog boxes
Plant group
If plant groups are defined, forecast data can be defined here for a certain plant group or for the whole
plant.
Yearly target
The annual target in kWh/kWp is entered here for the inverter or for the plant group. The yield in the se-
lected currency is calculated on the graph using this factor.
How to configure the feed-in tariff and yearly target:
•
Touch the button next to the plant group
A list of inverters is displayed, or plant groups if these have been defined.
•
Select the desired entry, and touch Back to continue.
•
Touch the input box for the yearly target
The virtual keyboard appears.
•
Enter the forecast value in kWh/kWp and confirm with OK.
•
Touch Save and then Next to go to the next dialog.
Setting monthly values for Target / Actual calculation
Enter the monthly percentage of the annual target here. The monthly values can be adapted to suit the
local conditions.
Procedure
•
Touch the input box next to the particular month
The virtual keyboard appears.
•
The monthly percentages must add up to 100% of the yearly target.
•
Enter the monthly percentage of the yearly target and confirm with OK.
•
Touch Save