In the Wiring unlimited page 36, connections "A" is OK and "C" can not be used.
Can you clarify if Connection "B" is right or wrong?
It has cross and check at the same time. What does it mean?
asked
Wiring Unlimited - Systems with multiple inverters
It mean, the NEGATIV pole of the Battery SHOULD NOT be switched and every PLUS pole to the Inverters must have there own contact in the switch.
The reason for doing this (not switching the negatives) is that with 2 pole switches, you cannot guarantee that both poles will close simultaneously. If the positive makes first, then the communications cable, which is connected to the inverter negative, will carry the charging current for the inverter capacitors. This results in sufficient energy to destroy the communications interface, as it is non isolated. In countries where the installation standard REQUIRES boht poles to be switched, you either have to apply for an exception from the regulator, OR you can BOND the negative poles of all the inverters together - an equipotential bond. The negative power for the coms (GX) device should also be connected to this bond, as should the battery earth, if you are earthing the battery.
