Safety Features
PV terminals
Battery terminals
Load terminals
Reverse polarity
Protected
Not protected (1)
Protected (2)
Short circuit (3)
Protected
Protected (4)
Switches off immediately
Over current
---
---
Switches off with a delay (5)
Reverse current
Protected
---
---
Over voltage
Max. 50 V
Max. 50 V
Switches off above 15.5/31.0 V
Under voltage
---
---
Switches off
Overtemperature
Reduces the charging current if overtemperature occurs and switches off the load if the
temperature reaches a high level.
(1) A battery fuse is necessary to protect the CMLmppt from getting damaged by reverse polarity connection on the battery
terminals.
(2) The controller can protect itself, but any connected loads might be damaged.
(3) Short circuit: >4x – 6x nominal current.
(4) The battery must be protected by a fuse, or it might be permanently damaged in case of short circuit.
(5) >200% nominal current: disconnects with 3s delay
WARNING:
The combination of different error conditions may cause damage to the controller. Always remove the fault
condition before you continue connecting the controller!
USB Connector
USB connector for 5V supply to small appliances like for charging cell phones, compact portable computers, small music
players; with up to 800 mA of current consumption.
Warning:
Do not connect the charging device anywhere else! USB-negative contact is connected to load negative.
Error Description
Error
Display
Reason
Remedy
Loads are not
supplied
Battery is low
(Red LED on)
Load will reconnect as soon
as battery is recharged.
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