Recent content by BobShrunkle

I finally got a response from MPP Solar.... :unsure::fp2 Output N-G is automatically bonded in inverter (battery) mode and this is meant to address any RCD application at the output side which could trip if it senses a differential between N-G. This is known as the N-G bond feature. 1. LINE...

I just temporarily bonded the output side of the inverter N-G and everything seemed to function as it should. On battery power, grid side disconnected. GFCI test button worked Circuit checker showed correct and test button worked 119v L-N 119v L-G 0v N-G Continuity(obviously) N-G Continuity...

Well unfortunately I have zero experience with relays. I wouldn't know where to start unless I could find some documentation or instructions. :oops: Not sure about program 38 either without seeing some examples and so far I haven't had any luck.

With the unit off G IN to G OUT shows continuity, neutral does not.

Thanks for sticking with me on this, here are the measurements. I added one more at the end. On shore power with Inverter set to utility first: N in to N out 0v G in to G out 0v N out to G out 0v On shore power with Inverter set to utility first but the breaker is off supplying the...

I did some more testing yesterday and I'm not sure how originally I saw continuity between NG on load side when the inverter was on because you can't test a powered circuit that I'm aware of. Or am I missing something? Maybe I was confused. I did add a hard bond as a test in the RV breaker...

It's pretty annoying that MPP Solar doesn't do a better job explaining n-g bonding for each scenario. I'm still waiting to hear from them.

For grounding on the DC side the Battery neg is attached to chassis at a single location. On the AC input side from shore or grid power the breaker box is grounded to chassis at a single location. The breaker box has one breaker and only feeds the inverter when on shore power. My diagram above...

A Clue! I just put the inverter in bypass mode and plugged in shore power. The GFCI trips when pushing its test button, it trips when I use a circuit tester test button, and I don't get any weird reversed polarity lights. It also tripped the supplying grid GFCI outlet. So I'm assuming the...

Are you saying try bonding neutral and ground in the breaker box before the inverter? (big blue line) Or are you talking about the line side of the GFCI?

This is getting stranger. I just did another test with two outlet circuit testers to make sure one wasn't bad. First off... the test button on the GFCI does trip it. When I plug in both of my testers one at a time they both show correct circuit, but when I push their test button neither one...

Alright I'll grab a new one tomorrow and see if that's the problem. Thanks.

I initially set up the inverter to never charge on grid power just while I was getting things going. Maybe if I go back in and change that setting to solar first and grid second it will pick up the AC chassis ground.

I haven't tried shore power yet, hopefully today.

For grounding on the DC side the Battery neg is attached to chassis. On the AC input side from shore power the breaker box is grounded to chassis. The breaker box has one breaker and only feeds the inverter when on shore power.