Charging Procedure - Truma SC 3 Mode D'emploi

Charging procedure

The device has electronic polarity reversal protection, return
current protection and solar short circuit protection. The
charge current is only enabled if the the battery is correctly
connected and sufficient sunlight power is available (see
"charge diagram").
Main charging phase
Charging with the maximum available solar charging current
until the final charging voltage is reached.
Post-charging phase
The post-charging phase is controlled depending on the dis-
charge depth.
Trickle charge phase
The charge voltage is set to 13,7 V. The charge current is
reduced to the level that is needed for the battery to com-
pensate for self-discharging. The consumers continue to be
supplied. If the consumed current exceeds the available solar
charging current, the charge can no longer be maintained.
If the battery voltage drops below 12.5 V the device automat-
ically switches to the main charging phase (if enough solar
charging current is available).
All manuals and user guides at all-guides.com
Gassing control
The charging end voltage is modified depending on the dis-
charge depth. If a battery is operated for a long time without
any gas development, there is a risk of damaging acid strat-
ification building up. This acid stratification can be remedied
by means of limited, controlled gassing. This function is
carried out by the gassing control. If the battery charge is
low and the "gassing active" voltage has been undershot, the
gassing control disables the overcharging protection until the
so-called gassing end voltage has been reached. The gassing
controller also increases the charge voltage in the event of
strong cyclization, which makes better use of the battery ca-
pacity. This control is also temperature-dependent, and also
suitable for gel batteries.
Parallel operation
If consumer current is removed during battery charging, it is
taken from the available solar charge current. If the consumed
current exceeds the available solar charging current, the
device cannot charge the battery. The device automatically
starts charging when enough solar charge current is available
again.
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