VOLTCRAFT MSW 300 Serie Mode D'emploi page 38

If you want to use longer cables, you may need to use cables with a larger line
cross-section. The following applies: The larger the line cross-section and the
shorter the cable, the lower the voltage drop on the line.
A too-high voltage drop on the line may cause premature undervoltage deactivation
of the inverter.
Suitable ring cable lugs are needed to connect the lines to the terminals of the
inverter. Clamping in of the open cable ends or even soldering on is not permitted.
Tighten the screw terminals; do not use any tools, to not apply any force.
Secure or attach the inverter and all cables, e.g. when using them in a vehicle, so
that proper operation of the vehicle is ensured and the inverter cannot come loose.
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