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IVT 20A Solar Manual

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OPERATING INSTRUCTIONS
Solar Battery Charger Unit 12/24V 20A
- Automatic 12/24 V switch
- Protection against over discharge
- Gas-formation control (gas control)
- Temperature compensation
Dear Customer,
Thanks you for buying our product. You have bought one of the most powerful, compact and reliable units of its class.
Please read the operating instructions carefully before use.
WARNING!!! Safety Instructions!!!
- Do not use the unit: In places which are dusty, damp. In a high humidity area (over 80% rel. humidity): Temperatures above 50° C, in areas
containing inflammable materials (liquids/solvents, gas). Do not immerse in water.
- Use only in closed, dry areas.
- Should the unit fail to operate, or show signs of not operating properly unplug immediately and make sure that the unit is not put into further
operation. Do not use the unit when visible signs of damage-due to transport or inadequate storage are noticeable.
- To prevent the risk of explosion by overcharging, install the battery in a well ventilated place.
- Use only solar cells as power source.
- Follow installation instructions strictly when connection the unit! The unit should be disconnected in reverse order (see installation
procedure).
- To prevent a short-circuit between Solar Charger Unit and battery, install a fuse on the positive terminal/pole.
- Equipment which on account of its function may not be switched off by means of load rejection (e.g. navigations lights) must be
connected directly to the battery and fused.
- Gas control of boats must be switched off. (refer to presettings)
The use of lead-batteries is common for the storage of solar energy (photovoltaic solar systems). Lead-batteries require protection against over
discharging and overcharging. This unit satisfies both requirements.
12/24V Changeover The unit can be used with both 12V and 24V photovoltaic solar systems. Manual switching is not required, as the
device adapts automatically to the system.
Protection against over discharge
Lead-batteries need to be protected against being discharged, otherwise damage can occur to the battery cells. The Solar Battery Charger Unit
protects lead-batteries from undercharging when the required battery power output is not achieved by automatically switching-off. The unit is
adapted to the load current and disconnects (automatically). As soon as the batteries are recharged by the solar cells, the load is automatically
reconnected.
Protected against overcharge
Exceeding the final charging voltage (13,7V DC) leads to the formation of gas, which damages the batteries. The amount of gas depends on the
temperature. The in-built temperature-sensor (approx 1,5m cable-length) automatically regulates the final charging voltage in relation to the
temperature in area of use/operating. The battery is not fully charged when the final charging voltage is reached. The charging current should
not be completely switched off, instead reduced, so that the final charging voltage is not exceeded. This is accomplished by the Solar Charger
Unit.
The charging process – “IU-charging” recharges the batteries evenly and quickly. The “IU-charging” is achieved by a very quick temporary short-
circuiting procedure – also known as the pulse-width modulation (PWM) shunt procedure!
Gas control
An over extended use of lead-batteries without a controlled gas-formation can lead to the development of damaging battery acids. The Solar
Charger Unit controls the gas-formation and therefore removes and prevents the development of battery acids. This process depends upon the
temperature and is regulated by the in-built temperature-sensor.
Warning: At use of sealed lead acid batteries with a solar system on boats/yachts/ships, the gas-control must not be operated. Switch-Off! (See
pre-installation)
Temperature compensation The in-built temperature compensator adjusts and regulates the final charging voltage and gas-
formation of the batteries to the temperature in area of use.
Connection and Operating-elements
1. LED green – battery is being charged.
Green LED goes out at night, as the solar cell has no
charging capacity.
2. LED red – load is disconnected.
Load disconnection is active, to prevent the battery from deep
discharge. As soon as the battery has sufficiently been charged,
the consumers are reconnected and the LED goes out.
3. Temperature sensor
4. + / - connection of load (consumer)
5. + / - connection of lead battery
6. + / - connection of solar module
7. 20 A plug-in fuse
Warning! Should the terminal/poles be wrongly connected to the
load output, can units <20A (fused) be completely damaged. Each
individual component must be fused.
www.busse-yachtshop.de | info@busse-yachtshop.de
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