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Hi,
we have 3-phase Multiplus II 5000/48 in offgrid mode (maybe with generator). There quite nice images how to wire grounding inside Wiring Unlimited guide, but I have troubles to understand if grounding bus bar should be connected to some ground rod or if it's enough connect this to negative battery pole?
Also we are not going to use RCD because inside house is TN-C wiring (only L + N wires) to sockets and load.
Thanks.
Hi Daniel ! A few things... In my setup the ground is connected to every metallic frame with the home ground (Inverter, Charger, Mppt, and to all the electric plugs at home / garage).
Depending where you are located, grounding the battery bank is not necessary. Mine are not grounded.
BUT, if you are using solar panels, you should have another ground only for them and using a coper rode as grounding. It is recommended having a distance of 20m between the 2 grounds. Also, I am using some lightning protections for the arrival of the DC power coming from the solar PV arrays. Hoping my pictures will help you.
Michel
