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Posted (edited)

I'm having a bit of trouble, and all the information I consume, opinions I hear and advice I get conflicts into two camps. Busy with an assisted installation, doing some on my own.

 

But first, my basic set up (in sequence):

DC-Side - PV. DC Combiner box with fuses (fuse holders), noark and surge protect (+ve/-ve/earth), going to MPPT. KETO device connecting MPPT, Inverter/Charger and Battery.

AC-Side - DB/House Mains, flowing through AC Combiner box with Changeover switch, breakers, into/out of Inverter/charger back through C/O switch to DB.

 

Now to the earth...

When I asked, of my advisor, "The earth connected to surge-protect in DC box, coming from green/yellow earth cable from PV. Is that right?"

He says "And from supply earth." (which I understand as AC, right? and which would thus bond AC and DC earthing together, right?)

 

Whilst many others, all who know better of course, say "DC must have a ground spike...separate earthing to AC...never together"

And yet after I watched the hilarious video on "Grounding and Bonding" by Mike Holt I'm convinced my advisor is correct, not to mention that Victron says "one earth and earth only"

 

Am I mistaken? Are there really two schools of thought?

What's the what-what?

Edited by Red Rubber Gloves

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