CTEK SMARTPASS - Manual (Page 18)

20 • EN
LARGE SERVICE BATTERY
INSTALLATION ShEET 5
D250S DUAL
12V
+OUT +IN
+IN
+IN +OUT
+OUT
SMARTPASS 12V
SITUATION
One alternator feeding a Starter battery
and a large Service battery.
PROBLEM
The Service battery will take a very long
time to recharge due to low alternator
voltage and restrictions in how the alter-
nator current is used. The Solar panel is
difficult to synchronize with the alterna-
tor. Due to these issues, the battery will
underperform and die prematurely.
SOLUTION
The SMARTPASS separates the two bat-
tery banks when the engine is off. With
the engine on, the alternator charges
the service battery with its maximum
current until it has tapered off to the
D250S Dual max level. Then the D250S
DUAL charger finalizes the charge. The
recharge time is minimized. Solar panels
are easily integrated and synchronized if
a D250S Dual is used together with the
SMARTPASS.
TIP 5
See Tip 1, Tip 2 and Tip 4
Wires that are connected to both
SMARTPASS and D250S DUAL should
be connected to SMARTPASS.
WARNING!
•Max 23 V input
•Do not connect two solar panels in series
WARNING!
D250S DUAL and SMARTPASS is not
reverse polarity protected