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Perfect. Also just having them mounted on cement backer board or drywall to be safe.
Some people have components in their garage on plywood which is flammable.
Grounding 6 - EG4 LL V2 server rack batteries in a rack
- Thread starter muaddib721
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Perfect. Also just having them mounted on cement backer board or drywall to be safe.
Some people have components in their garage on plywood which is flammable.
I have 3 EG4-LL-S batteries in an EG4 rack and 1 EG4 18KPV. I'm ground the batteries together with their ground screws and then to the rack. My question is can I then ground the rack and batteries to the 18kpv, to the house ground to to its own separate ground?
timselectric
If I can do it, you can do it.
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The more I read posts on grounding the more confusing it gets. According to the EG4-LL-S battery docs you just need to ground the cabinet. If the batteries are already grounded to the cabinet by bolting the ears and I then also use the ground screws on the battery will it matter that I'm grounded 2x?
Also, I had someone as SS suggest that grounding the rack to the inverted was not recommended. I wish their docs were cleared on this.
Also, I had someone as SS suggest that grounding the rack to the inverted was not recommended. I wish their docs were cleared on this.
timselectric
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timselectric
If I can do it, you can do it.
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It's all grounding. It doesn't really matter how everything is connected together. As long as it's all connected together.
I always suggest the simplest option.
EGC should always be ran along side of the current carrying conductors. So running the EGC through the inverter connection area (right passed the ground bar) and out to somewhere else, is kinda silly.
I grounded the EG4 battery rack to the main panel with 6ga on a loop connector into the back rail. Plugged an extension cord into a different outlet and continuity tested the ground from the extension to all the bare metal screws in the batteries. The grounding at the rail sufficed to ground all attached items.
edit: Sanded the area around the hole I drilled for the connector. Torqued it down and baremetal primed the sanded area.
edit: Sanded the area around the hole I drilled for the connector. Torqued it down and baremetal primed the sanded area.
EG4_Jared
Online Support for EG4 Electronics
EG4_Jared - can you clarify that? Do you mean you shouldn't ground both AC and DC together? Both my GRID and LOAD are using the 18k PE bar? I need to know where it's recommend to ground the EG4 rack. Am I safe just having it's own ground or use the existing house ground. EG4 really needs to be clear. You can tell by all the ideas on this thread that we need more precise instructions.
timselectric
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Instructions aren't helpful if they aren't correct.
EG4_Jared
Online Support for EG4 Electronics
Quattrohead
Solar Wizard
That section does not seem to apply to the question because -
1. It talks about more than 60v but less than 300v, hence not 16 cell LifePo4 battery packs.
2. It talks about grounding of the actual positive or negative connection, not equipment chassis grounding.
I think what EG4 are trying to say is that grounding solar panels to the inverter directly has been known to induce noise into them in certain circumstances.
I would say this is less likely to be a problem with batteries due to the short wire run within the same electrical environment.
timselectric
If I can do it, you can do it.
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I think that those "circumstances" are problems that should be corrected. Instead of trying to find a way to make them less noticeable.
I do appreciate all the responses, but not sure we've gotten any further. My query started because when running on the batteries my light blink. The eg4 docs for the rack say to ground the rack. EG4_Jared say's don't ground the rack to the inverted. SS said the same thing - don't ground to the inverter. So, through the process of elimination I'll ground the DC battery rack to the main house ground. I just wish the eg4 battery rack doc would say "don't ground the rack to the inverter. Use the main house ground".
timselectric
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Ground is Ground.
It's all connected together.
Where you connect doesn't matter.
I try to keep my conductors as short as possible , for cost savings. But if you want to connect further away, it won't hurt anything.
It's all connected together.
Where you connect doesn't matter.
I try to keep my conductors as short as possible , for cost savings. But if you want to connect further away, it won't hurt anything.
