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Grounding and Bonding the MPP LV6548 inverter

Grounding and Bonding the MPP LV6548 inverter 2023-03-03

Click on the orange download button above to get the document.

This document shows how to handle grounding and bonding with the MPP LV6548 inverter.

Warning: The document shows Common Neutral configurations of the system but MPP has said it is unsafe to set up a system with a common neutral between the input and output. (See Appendix A of the document)

Warning: Several of the configurations require the removal of the internal bonding screw. It is not clear whether removing the screw will void the warranty or not.


NOTE: Previously, this document covered both the MPP LV6548 and the EG4 6500EX. The information for the 6500EX has been split out and placed in a separate resource here


Reviews, corrections & comments are always welcome.
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Solid info. Thanks for putting it together. A similar presentation including array config would bring value I believe. I'm not aware of such a thing. Are you? I've seen recently and have my self just experienced 120 VAC on the panel frames. Bit me twice hard. Most suggest to ground / earth to correct, but MPP solar specifically states no grounded arrays for the LV6548. I will reconfig my setup per this very awesome document and see if anything changes. but wanted to throw the array thing out there. Thanks Again!!
I just sent back 2 LV6548's because of several issues that may have been caused by Neutral bonding. Your document explains very well how this may have been the issue from the beginning! Thank you!

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