Mastervolt MLI Ultra User Manual

MLI Ultra 12/1250, 24/1250 – User and Installation Manual
7
Battery switch-button (safety disconnect)
CAUTION!
This built-in battery switch is to safely disconnect the battery. It also disconnects from the
charger!
Figure 3: Battery switch-button
Press short for status; Short press to make LED C show the status of the Battery switch.
• Solid on for 1 minute: battery is on (switch is closed).
• Blinking for 1 minute: battery is off (switch is open).
Press 1 sec; Long press for 1 second to switch-off. LED C will blink.
Press 5 sec; Long press for 5 seconds to switch-on. LED C will light up for 1 minute.
Note: If the battery was switched-off manually, it must be switched-on manually.
Battery Management System (BMS)
The MLI Ultra has a built-in Battery Management System (BMS) and a built-in battery switch. The BMS
protects the battery by automatically controlling the battery switch when thresholds are met. This is
called a 'battery safety'-event. See chapter "SPECIFICATIONS” for the thresholds. An automatically
switch-off is initiated after the following events:
• Cell over- or under-voltage
• Battery over-current
• Over-temperature of the MLI Ultra
• Low State of Charge (SOC)
Likewise, automatically switch-on is initiated when the conditions are safe again.
Charging
The MLI Ultra can be charged with any Mastervolt battery charger, like the ChargeMaster Plus series,
or with a ProMariner ProSport HD or ProNautic for example. Make sure that the charger is Lithium Ion
compatible and meets the MLI Ultra's charge parameters. Set the battery type to MLI or adjust the 3-
step+ (also known as IuoUo) charge characteristic as follows:
Model
Bulk / absorption voltage
Float voltage
12V
14.25 V
13.5 V
24V
28.5 V
27 V
LED B will blink yellow when the state of charge (SOC) is low. Make sure to charge when the SOC is
low to preserve the lifespan.
Recovering from deeply discharge
If the MLI Ultra was deeply discharged, the integrated 1A charger charges the cells to 2.5V. After that, a
self-test on the cells will activate automatically to test if the cells are damaged by the deep discharge.
When the result is ok, the battery will be switched-on, and normal charging can start. When the result is
not ok, LED A will be solid red. In that case, contact your Mastervolt dealer.
Please note that this procedure may take between 30 minutes to 5 hours!

Mastervolt MLI Ultra Specifications

General

Brand	Mastervolt
Model	MLI Ultra
Category	Camera Accessories
Language	English