Connecting and Grounding
The controller is intended for indoor use only. Protect it from direct sunlight and place it in a dry
environment. Never install it in humid rooms (like bathrooms). The controller warms up during
operation, and should therefore be installed on a non flammable surface only.
Connect the controller by following the steps described below to avoid installation faults.
Observe the following connection sequence when installing the system:
1. Connect the battery to the charge controller – plus and minus.
2. Connect the photovoltaic modules to the charge controller – plus and minus.
3. Connect the load to the charge controller – plus and minus.
Follow the reverse procedure when uninstalling!
To avoid any voltage on the wires, first connect the wire to the controller, then to the
battery and to the photovoltaic modules. But for the load, first connect the wire to the
load, then to the controller.
Recommended minimum wire size: CXup 10 : 4 mm
2
; CXup 20 : 6 mm², CXup 40 : 10 mm²
Make sure the wire length between battery and controller is as short as possible.
Be aware that all positive connections of the CXup controller are common and therefore
have the same electrical potential. If any grounding is required, always do this on the
positive wire.
REMARK: If the device is used in a vehicle whose battery negative pole is connected to the
chassis, please make sure that none of the loads connected to the controller has an electric
connection to the car body. Otherwise the load will be short circuited, thus affecting the Low
Voltage Disconnect function and the electronic fuse function of the controller.
REMARK: Mind the recommendations of your battery manufacturer. We strongly recommend
connecting a fuse directly to the battery to protect any short circuit at the battery wiring. The
fuse must correspond to the nominal current of the charge controller: 15A for CXup 10 , 30A for
CXup 20 and 50A for CXup 40.
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General