Samlex America PR-3030 - Manual (Page 11)

11 739.704 | 11.10
7.5 Daylight function
This function allows a switch-on point for the load output to be defined
that occurs during the night / darkness when daylight is detected. The aim
is to switch on a load a specified number of hours before dawn. The load
output remains switched off outside this period.
The controller recognises Day (= sun symbol) when the module voltage is
greater than the battery voltage and the battery can be charged. Recogni-
tion duration: approx. 30 s.
This duration extends to 15 minutes, when Night was previously detected
due to a solar module not being connected or a module with a reverse
current diode was detected and the module was then correctly reconnected
and battery charging took place.
The controller must first have recognised at least one night / day cycle
before the daylight function can be activated. This means that the daylight
function cannot be activated in the first night following the installation day.
The function can only become active in the following night.
The switching point is thus not based on a specific time of day but rather
relative to the point when the controller detects the transition from night
to day.
This point can be influenced by bad weather, fog or the natural seasonal
changes in the lengths of day and night, so a certain amount of tolerance
is required. This is especially the case when the natural conditions are
interrupted by manual intervention such as disconnection or covering of the
solar modules. Despite this, the controller recalculates the reference point
for the daylight function after each night / day transition and therefore
automatically adapts to the natural conditions after a few days.
Note
The daylight function is not executed when the time periods for
the night light and daylight functions overlap. Overlap means: The
switch-off point of the night light function lies after the switch-on
point of the daylight function. When the night light function ends,
then the daylight function will also end. An overlap of the time
periods can be caused by:
• Incorrect setting of the night light and daylight time periods by
the user
• Seasonal reductions in the length of the night
• Poor weather (heavy cloud)
• Covering of the module (snow)
Alternatively: Set the night light function to ON (load output
remains switched on all night, regardless of the daylight function
settings).