The time of midnight is estimated based on solar activity, and depends on your geographical location. Daylight saving times can
cause a further deviation between the "solar" and the "clock" midnight. The Mid-point shift function will compensate for these
differences. Use 0 to disable the shift (default).
The Mid-point shift setting is only relevant when your streetlight setting program uses "Midnight" as a
switching moment.
Calculation Example:
For calculation we use a day of 1440 minutes, where Sunset is at 19:00 (1140 minutes) and Sunrise is at 6:25 (385 minutes):
• The night duration in minutes is: 1440m
(min/day)
-1140m(time to sunset) + 385m
(time to sunrise)
= 685m.
• The degree of shift = time of sunset
(minutes)
+ half the duration of night
(minutes)
- length of day
(minutes)
= 1140m + 342m - 1440m =
42 minutes.
Example configuration
The selections which have been made on above screen image results in this program:
• At sunset - the light will be switched on for a fixed time.
• Dim level at sunset - at Full brightness (100%).
• Keep lights on during - the duration has been set to 1h 0m.
• Dim level at end - at the end of one hour the brilliance will be reduced to half (50%).
Also:
• At sunrise - the lighting will be adjusted before sunrise.
• Time before sunrise - at 1h 0m before sunrise, the following adjustment will be made:
• Dim level - full brilliance will be restored (100%).
5.2.4. TX port settings
The VE.Direct-TX port can be used to send a signal to an external device. For example, to send a PWM signal to dim a
streetlight.
To use the TX port, a VE.Direct TX digital output cable is needed.
MPPT solar charger manual
Page 26 Configuration and settings
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