Battery Charging Information - Victron energy MPPT 75/15 Anleitung

3.7 Battery charging information

The charge controller starts a new charge cycle every moring, when the sun starts shining.
The maximum duration of the absorption period is determined by the battery voltage
measured just before the solar charger starts up in the morning:
Battery voltage Vb (@start-up)
23,8V < Vb < 24,4V
24,4V < Vb < 25,2V
(divide voltages by 2 for a 12 V system)
If the absorption period is interrupted due to a cloud or due to a power hungry load, the
absorption process will resume when absorption voltage is reached again later on the day,
until the absorption period has been completed.
The absorption period also ends when the output current of the solar charger drops to less
than 1 Amp, not because of low solar array output but because the battery is fully charged
(tail current cut off).
This algorithm prevents over charge of the battery due to daily absorption charging when
the system operates without load or with a small load.
3.8 VE.Direct communication port
Several parameters can be customized (VE.Direct to USB cable, ASS030530000, and a
computer needed). See the data communication white paper on our website.
The required software can be downloaded from
http://www.victronenergy.nl/support-and-downloads/software/
The charge controller can be connected the to a Color Control panel, BPP000300100R, with
a VE.Direct to VE.Direct cable.
6
Vb < 23,8V
Vb > 25,2V
Maximum absorption time
4 h
2 h
1 h
0 h