Swift Group Select 122 Owner's Handbook Manual page 78

S WI FT C OM MAN D P OWER CO N TR OL S Y S T E M ELEC TR IC AL SY STEMS
3.3 Battery Charger
The system incorporates an intelligent three-
stage battery charger.
During stage 1 the battery voltage is increased
gradually while the current is limited to start the
charging process and protect the battery. At
stage 2 the voltage rises to 14.4V to deliver the
bulk charge to the battery. When the battery
is charged, the voltage is decreased at stage
3 to 13.6V to deliver a float charge to maintain
the battery in the fully charged state. The
charger can be left switched on continuously
as required.
The battery charger / power converter also
provides power to the leisure equipment when
the mains supply is connected. This module
supplies DC to the leisure equipment up to a
maximum of 25 Amps (300 Watts), therefore
the available power is distributed between the
leisure load and the battery, with the leisure load
taking priority as per the following example:
Leisure Available power for battery
Load charging
5A
10A
15A
20A
!
WARNING: Under heavy loads the
Battery Charger case may become hot.
ALWAYS ensure the ventilation slots have
a clear flow of air. Do not place combustible
materials against / adjacent to the charger.
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3.4 Leisure Battery
A) Type / Selection
For optimum performance and safety it is
essential that only a proprietary brand LEISURE
battery is used and it is suggested to select a
battery from the NCC Verified Battery Scheme
with a typical capacity of 75 to 120 Ah (Ampere
/ hours). Depending on the prospective use
of the vehicle the correct type should be
selected (A, B or C). A normal car battery is
NOT suitable. This battery should always be
connected when the system is in use.
The PSU is configured to work with standard
lead acid leisure batteries, and in most cases
is also compatible with the latest range of
Absorbed Glass Matt (AGM) batteries. The
system is also suitable for Lithium batteries
with built-in Battery Management Systems
BMS).
Before fitting non-standard batteries please
check that the charging profile described in 3.3
is suitable for the type of battery by referring
to the battery documentation or battery
manufacturer.
Some vehicle installations can cater for two
20A
leisure batteries connected in parallel. In these
cases it is recommended that two identical
15A
batteries are used.
10A
The battery feed is fitted with an inline fuse
5A
between the battery and the electrical harness,
and is usually located immediately outside the
battery compartment or within 500mm of the
battery. The maximum rating of this fuse is
20A per battery. If a single battery is fitted to
a motorhome, this fuse could be up to 40A,
however if two batteries are fitted each battery
should be fused at a maximum of 20A.