CTEK MXT14000 24V Battery Charger (14Amps 24V)

The CTEK MXT14000 is designed to provide power for heavy-duty vehicles with 24V batteries.

Perfect for buses, trucks, larger boats or the workshops that service these vehicles.The SUPPLY mode means the battery charger provides power even without a battery. The SUPPLY mode is indispensable when changing the battery as you avoid losing irreplaceable program settings. Using RECOND mode, you can correct the acid stratification that often occurs in deeply discharged batteries. The battery thereby has its power restored and has a longer service life.

Features

• Eight step, fully automatic switch mode model
• Revives, charges, checks and maintains virtually all types of 24V lead-acid batteries (Wet, MF, GEL and AGM) from 28Ah to 300Ah, up to 500Ah maintenance
• Desulphation mode with pulses
• Soft start for severely discharged batteries
• Recondition mode with controlled top charging recovers the capacity of a severely discharged battery
• Maintenance pulse charging increases battery life and gives superb performance
• Supply mode for use as a power pack, battery backup (UPS) or float maintenance
• Charges even drained batteries
• Temperature compensated for optimal charging voltage at all times
• Low back current drain, low ripple and input voltage independent (220-240V)
• High efficiency: 85%
• The charger can be connected for months, ideal for seasonal vehicles
• Compact design with mounting holes for permanent assembly
• 2 year warranty

Safety

• Electronic safe, the charger will not damage vehicle electronics. The battery does not normally need to be disconnected from the vehicle when charging
• Minimal gas build-up and a patent-pending spark protection system. (however, in supply mode the spark free feature is disconnected).
• Short circuit and reverse polarity protected
• Double insulation
• Cooling with power controlled fan
• Approved for outdoor use, (IP44)
• Progressive temperature protection
• Tested and approved by Intertec SEMKO AB. S-marked and conforms to the following standards: EN60335-1, EN60335-2-29, EN55022, EN 61000-3-3, EN 61000-3-2, EN55014-2

Temperature

To protect the charger from overheating, the MULTI XT 14000 is fitted with power limitation. The power reduces when the ambient temperature increases. The power also reduces if the charger were to be covered, which protects the charger from damage. The charger continues to work, but at a lower output. When the ambient temperature drops the power automatically increases again.

Charging

The MULTI XT 14000 charges and analyses in eight fully automatic steps.

1. Desulphation
   Desulphation with pulsing for sulphated batteries.
2. Start
   Starting phase for charging. The starting phase continues until the battery’s terminal voltage has risen over a preset level. At this point, charging goes into the bulk phase. If the terminal voltage has not reached the preset level within a preset time, charging is suspended. The error mode is indicated. This indicates a battery which is faulty or has too large capacity. If a large battery is charged that has been severely discharged, it may be necessary to restart the charger after a preset time.
3. Bulk
   Primary charging where approximately 80% of the charging takes place. The charger delivers maximum current until the terminal voltage has risen to the preset level. After a number of hours, the charger goes on to the next phase, even if maximum voltage is not reached.
4. Absorption
   Final charging, voltage is kept at the preset level. During this phase, the current is gradually reduced. If the maximum length of time for Absorption is exceeded, the charger automatically continues with Analysis.
5. Analysis
   Charging is suspended for a short period and the battery voltage measured. If it falls too quickly, the battery is probably faulty. Charging is suspended and an error is indicated.
6. Recond
   Recond is used to recover severely discharged flooded batteries and for reconditioning severely discharged batteries suffering from stratification. The voltage increases with reduced current for a limited time period (depending on the charge level of the battery at start). The higher voltage starts some gassing and mixing of the acid, which is beneficial for both battery capacity and expected life. The battery could emit explosive gas during this step.
7. Maintenance charging - float
   During the first 10 days of maintenance charging the battery is maintained with constant voltage.
8. Maintenance charging - pulse
   State of charge varies between 95% and 100%. The battery receives a pulse when the voltage sinks, keeping the battery in good shape when it is not being used. The charger can be connected for months at a time. If the battery is charged and/or the battery’s terminal voltage drops, the charger starts a charge pulse until the voltage has reached the preset level. The charge pulse is then interrupted and the cycle is repeated as long as the charger is in pulse maintenance phase. If the terminal voltage drops even lower, the charger automatically reverts to the beginning of the charging curve. If possible, check the water level in the battery.

Using the MULTI XT 14000 gives your battery an optimum service life and operational reliability.

Batteries

The MULTI XT 14000 can be set very easily to charge different types of lead-acid batteries (Wet, MF, GEL, Calcium/Calcium and AGM) and conditions. You will find an explanation of the various battery types under Charger University, Battery Types.

The MULTI XT 14000 charges a wide range of battery sizes, from 50Ah to 500Ah.

SETTINGS	EXPLANATION
NORMAL	Normal setting for wet batteries, MF and for most Gel batteries. A somewhat lower charge voltage may be preferable for some GEL batteries.
SUPPLY	In this mode, the charger delivers a constant voltage. This is the best maintenance mode for applications where maximum capacity from the battery is important. The MULTI XT 14000 could also be used as a power supply without a battery attached in this setting. No counter voltage is necessary to start the charger in this mode. Note that the charger is not spark free in this mode.
RECOND	This mode is used to recover severely discharged batteries where you might expect stratified acid (high acid weight at the bottom, low on top). Use this mode with care, as the high voltage may cause some water loss. 32V is normally no problem for electronics in 24V systems, although maximum effect and minimum risk for electronics is achieved by disconnecting the battery.

BULK CHARGE TIME
BATTERY SIZE (Ah)	FOR ABOUT 80% CHARGE (h)
60	4
100	5
225	13
500	28

Mounting

The charger is easily fitted in place using four screws. The diameter of the mounting holes is 4.5mm located as shown in the image. The image also shows the dimensions of the charger.

The charger must be fitted with the top or long side facing up to be approved for outdoor use.

Equipment

The MULTI XT 14000 is delivered with a battery lead with clamps, colour coded for easy +/- identification.

The charger also has a sensor cable located together with the battery leads. The unit automatically adjusts the charge voltage if the temperature deviates from +25°C. Higher temperatures lower the voltage and lower temperatures raise the voltage. The sensor cable can be extended or shortened without affecting functionality.

Technical specification

MODEL	MULTI XT 14000
Input voltage AC	220-240VAC, 50-60Hz
Output voltage	Nominal: 24V
Efficiency	85%
Charging voltage	28.8V, Temperature compensated
Charging current	14A max
Back current drain*	<2Ah per month
Ripple**	<4%
Ambient temperature	-20°C to +50°C, output power is reduced automatically at higher temperatures.
Cooling	Fan
Type of charger	Eight step, fully automatic, switch mode with pulse maintenance.
Type of batteries	All types of 24V lead-acid batteries (Wet, MF, AGM, Calcium/Calcium and GEL).
Battery capacity	28-300Ah, up to 500Ah maintenance
Dimensions (L x W x H)	235x130x65mm
Insulation	IP 44 (Outdoor use)***
Weight	1.4kg1.4kg

*) Back current drain is what drains the battery if the charger is connected without the power cord connected.

**) Ripple denotes the amount of interference there is to the current and voltage. A high current ripple heats the battery and shortens its life. A linear charger has a current ripple of 70 - 400% which is much larger than the maximum 5% for a modern sealed battery. Voltage ripple could harm other equipment, which is connected to the battery.

MULTI XT 14000 delivers voltage and current with very low ripple. The battery gains a long service life and there is no risk of damage to other electronic devices connected to the battery.

***) IP 44 cannot be guaranteed unless the charger is positioned with its top or long side facing up.