48 v inverter backfeeding into neutral

Started by Bmcgaha, February 07, 2023, 08:42:33 PM

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I have a MN5048DIY inverter that is giving a positive voltage on the inverters neutral terminal, which is completely disconnected from any loads; it is just the batteries, PV panels, and the inverter. For some reason, I'm getting back feeding or something on my neutral side. Any help would greatly be appreciated. Thanks...


Are you saying you get voltage reading between neutral and ground ?
system 1
Classic 150 , 5s3p  Kyocera 135watt , 12s Soneil 2v 540amp lead crystal for 24v pack , Outback 3524 inverter
system 2
 5s 135w Kyocero , 3s3p 270w Kyocera  to Classic 150 ,   8s Kyocera 225w to Hawkes Bay Jakiper 48v 15kwh LiFePO4 , Outback VFX 3648 inverter
system 3
KID / Brat portable


And how much voltage are you reading ? Is it the whole battery voltage or just a little ?

It may be some high impedance leakage ?   If that is the case, then you could use resistors to measure the impact of this leakage.

Does the inverter appear to work OK otherwise ?

K7IQ 🌛  He/She/Me


Neutral floats in the inverter and depends on you to make a neutral to ground bond some where in the AC system, Without that bond neutral will have voltage readings to ground as it is floating.