Specifications

PerfectCharge
132
www.dometic-waeco.com
Contents, specifications and availability are subject to change serving the technical improvement.
132 – 133Contents, specifications and availability are subject to change serving the technical improvement.
IU0U automatic chargers
IU0U charging characteristics Limited time of the U0 phase
The advantages of a temperature sensor Simultaneous charging of several batteries
This fast and gentle charging technology represents an extension
of the well-proven IU charging curve.
It includes the additional time constant 0 and a further constant voltage
U for compensation charging. Like with IU charging characteristics
charging is initially performed with a constant current. When the gas
development voltage has been reached, the voltage is maintained at
the same level until the charging current has fallen to a minimum. At
that point the charging voltage is reduced to the float charging level –
the charging process is completed.
To prevent overcharging when power is drawn from the battery while
charging, the duration of the U0 phase is limited.
Ideally, the system should switch from the main charging voltage U0 to
the float charging voltage U when the battery is 100% charged. A good
indication for a fully charged battery is a low current intake.
If an electrical appliance exerts a current load on the battery during the
charging phase (e.g. when a light is on), the charging current will never
reach the low current value required by the system to switch over to
the U phase. As the U0 phase is limited to a finite time, the switch-over
to the U phase occurs regardless of the charging voltage level. This
makes it impossible to overcharge the battery.
A temperature sensor is recommended when battery charging takes
place in varying or extreme ambient temperatures. This is because the
optimal charging voltage for a battery largely depends on the tempe-
rature conditions. In cold batteries, for instance, the gas development
voltage is higher than in warm batteries. The sensor is fitted on the
battery or close to it and measures the temperature. Depending on the
result, the battery charger adjusts the main charging and float charging
voltage. At high temperatures the voltage is reduced to prevent
battery gassing. At low temperatures the voltage is increased to improve
the battery charge. The diagram shows how the temperature sensor
adjusts the charging voltage to the temperature of the battery.
The TF-500 temperature sensor (p. 137) is available as an optional
accessory for all PerfectCharge IU0U charger models of series IU 152A
to IU 802A.
When two or more batteries are used independently of one another,
the load on them will be different and so will the required extent of
recharging.
This is taken into account by our double and triple charger models
(series IU 152A to IU 802A, p. 136 – 137). These units feature two or
three battery outputs, and an additional one for charging the starter
battery.
The chargers incorporate diodes to divide the charging current and
prevent charge compensation between the batteries. While charging
the weaker battery is initially brought to the charge of the stronger
one. Both (or all three) batteries are then charged at the same voltage
level until the full charge is reached. Naturally, it is also possible to
connect just one or two batteries to a double or triple charger.
13.0 V
13.8 V
14.4 V
15.0 V
0501-302010 040
End-of-charging voltage
Float charging voltage
Temperature (°C)
Temperature compensation
U0 8/16 h
U (V)
I (A)
U
Base load
U0 8/16 hI
U (V)
I (A)
U
Time (h)
U (V)
I (A)
Time (h)
U (V)
I (A)
U0 8/16 h
U (V)
I (A)
U
Base load
U0 8/16 hI
U (V)
I (A)
U
Time (h)
U (V)
I (A)
Time (h)
U (V)
I (A)
Why fully charging the battery regularly is important
You expect a battery to have full capacity and high starting currents. However, it can only supply these when it is properly cared for. This includes regular
recharging. This occurs during the journey, allowing the battery to serve its purpose for a number of days. A 100% full charge, as battery manufacturers
stipulate, usually can't be attained this way. However it is still imperative to prevent sulphation and premature ageing of the battery. Using a WAECO
battery charger with IU0U charging characteristics solves the problem, charging the battery gently and to 100% capacity. We recommend fully charging
your battery at least once a month, which will maintain its condition at the same time. If you are not planning to use your leisure vehicle for a while,
you should fully charge the battery beforehand.
PerfectCharge IU 6
Page 139
IU0U automatic chargers in
premium quality
IU / IU0U automatic chargers
PerfectCharge IU 152A to IU 802A
Pages 134 – 137
PerfectCharge IU 812
Page 138
IU0U chargers by WAECO
… give your batteries a longer life!
Starter batteries and supply batteries are designed for
different tasks. To start the engine, starter batteries must
initially supply a high current level and will then serve as an
energy buffer with smaller partial cycles. Supply or
on-board batteries, in contrast, are discharged at lower
current levels over longer periods of time and then
charged again. This means they are subjected to
considerably higher loads. Optimum charging technology
is therefore the key to success.
IU0U battery chargers from WAECO ensure your batteries
have a longer life, and prevent battery damage. They
provide optimum charging for all types of leisure batteries
(gel, AGM and wet), because they charge quickly and
gently at the same time.
Our comprehensive product range covers everything from
inexpensive compact chargers to professional units for
simultaneous charging of several batteries.
IU0U battery chargers – the benefits at a glance
› Fast and gentle charging with IU0U charging
technology
› Suitable for all types of lead batteries
(gel, AGM and wet batteries)
› High energy efficiency with switch-mode technology
› Stable voltage supply without power fluctuations
› Safe to use with overload and short-circuit protection
› Compact design, low weight
› Easy to fit
IU0U automatic chargers