4. DC wiring
4.1 Select the right cable It is important to use the correct cable thickness in a system. The correct cable can only be selected once you know the currents in a system. This is an example of what cable size belong to these currents. Providing the cable distance is less than 5 meters.
In order to avoid very thick cables, the first thing you should consider is to increase the system voltage. Large systems mean large currents. If you increase the system voltage the current will drop. The preferred upper inverter power limits per system voltage are: • 12V: up to 3000VA • 24V: up to 5000VA • 48V: 5000 VA and up Remember, that in case you have some loads or charge sources that only can deal with 12V, you can use DC/DC converters, rather than to choose a low voltage for the entire system. As explained already, it is very important to always use the right cable thickness. The correct cable thickness as mentioned in the product manual. Using too thin cabling has a direct effect on system performance. Generally, cable core thickness is indicated in mm². This indicates the surface area of the cable core. But other annotations are used as well. Like AWG (American Wire gauge) is used. In that case see here for a conversion table.
To find out the core dimeter of a stranded core cable, look on the cable insulation. There will be markings on the cable that indicate cable core thickness. Be aware that some cables can have very thick insulation and they may appear thicker than they are.
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