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2.3 Wire Size
Battery and Load Terminal connections
Max terminal size is 4mm2/12AWG for MoonRay 160 and 6mm2/10AWG for MoonRay 320.
Wire Size
Connection between battery and controller needs to be without a voltage drop. If longer than 2m please
ensure that you use a cable bigger than the terminal size.
2.4 Installation layout planning
WARNING: Open lead acid batteries will produce hydrogen gas during charge. Batteries of
this type requires a well-ventilated area.
Safety: While working with the wiring keep the solar panels covered and the fuse in between the
controller and the battery disconnected.
Location: The controller should be attached to a wall with terminals facing downwards.
This to ensure natural thermal convection, letting air pass via the back of the controller (It is also a
requirement to ensure the IP33 dripping water protection).
Ventilation: For a proper cooling the wall should be left empty 15cm above and below the controller. If
installed in a closed box, ventilation is required.
Fuse: It is recommended to use a fuse in between the controller and the battery. The recommended
size is 15A for MoonRay160 and 30A for MoonRay320.
What is the Load port?
Normally no equipment is required to be moved from existing connections (i.e. moved from direct battery
connection). When the controller is used as a battery charger only, the Load port will not be used. The
load port is an advanced timer and/or voltage cut off controlled outlet. Load port settings is covered later
in this manual.
Grounding and electromagnetic interference
This controller is certied for its low electromagnetic (radio) interference. However, if experiencing
problems please ensure that positive and negative cables run close alongside each other. Even better if
twinned. We also recommend the installation of ferrites on all cables going out of the controller and on
the electricity feed to the radio(s). Ferrites should be tuned to the correct frequency at which interference
occur. Several turns of the cable around the ferrite is recommended.
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