Victron energy Quattro 12/5000/200 User's Manual & Installation Manual page 4

2.2 Battery charger
Adaptive 4-stage charging characteristics: bulk – absorption – float – storage
The microprocessor-driven adaptive battery management system can be adjusted for various types of batteries. The adaptive function
automatically adapts the charging process to battery use.
Correct charging quantity: adapted absorption time
In the event of slight battery discharge, absorption is kept short to prevent overcharging and excessive gas formation. After deep
discharging, the absorption time is automatically extended in order to charge the battery fully.
Limiting ageing by excessive gas formation: limited voltage rise
If a high charging current as well as an increased charging voltage is used to shorten charging time, the Quattro will limit the voltage
slew rate after the gas pressure has been reached. In this way, excessive gas formation in the final stage of the charging cycle is
prevented.
Less maintenance and ageing when the battery is not used: the storage feature
The Quattro switches over to 'storage' if no discharge has occurred after more than 24 hours. The voltage is then lowered to 2.2 V/cell
(13.2 V for a 12 V battery). Gas formation in the battery will then be drastically reduced, and corrosion of the positive plates is limited
as much as possible. Once a week, the voltage is increased to absorption level to recharge the battery; this prevents stratification of
the electrolyte and sulphate formation.
Two DC outputs for charging two batteries
The Quattro has two DC outputs, one of which can supply the full output current. The second output, intended for charging a starter
battery, is limited to 4A and has a slightly lower output voltage.
Increasing the lifecycle of the accumulator battery: temperature compensation
Each Quattro is supplied with a temperature sensor. The temperature sensor serves to reduce charging voltage when battery
temperature rises. This is particularly important for maintenance-free batteries, which could otherwise dry out by overcharging.
More on batteries and charging
Our book 'Elektriciteit aan boord' [Electricity on board] offers further information on batteries and battery charging, and is available free
of charge at Victron Energy (see www.victronenergy.com ). For more information on adaptive charging characteristics, please refer to
the 'Tech Info' page on our website.
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