7 inverter outlets not working

[Paul M]

I have a 3121r montana and the 7 outlets from the inverter aren't working never have. The residential refrigerator is the only thing that works. I checked the distribution panel and there isn't any voltage on any of the breakers or on either 120 volt leg. If I disconnect the inverter power, and trip the breaker labeled general it will remove power to the refrigerator, but with inverter on there is no power on that breaker. Any suggestion on how this is wired, Montana was no help.

[Mikendebbie]

My expertise on brain surgery, nuclear submarines and electrical issues in a Montana are equally sketchy and short...but this is what I would do. To my knowledge - wiring diagrams from the factory for our rigs do not exist.

One clarification - my inverter is mounted to the basement "ceiling". It runs the residential refrigerator and I think that is all it does. The converter is inside by the steps to the front bedroom...the thing with all the 12 volt fuses and breaker switches for the 120 volt circuits.

There is a "red key" switch in the convenience center...make sure it is ON.

Find the GFCI plugs in your rig and make sure none are tripped. Seems like my GFCIs are on the island and in the bathroom, and there is one on the inverter that runs the residential fridge...maybe there are others but I don't recall for now.

There is a red switch on the bulkhead wall behind my batteries. This is the power to the inverter that runs the residential fridge...it sounds like yours is turned ON and your fridge is running.

Someone with better advice will chime in shortly to provide better help and advice.

Edit: I recently purchased one of these things to add some sanity to my lack of electrical knowledge. It has a nice app for my iphone with real-time readings. It recently detected high voltage and shut down power to the rig. Something like this would tell you if the power coming into the RV is ok.

[RMcNeal]

Paul, I'm not sure what year your 3121 is. Mine is a 2019 3791RD and, like Mike's, the only thing my inverter runs is the refrigerator. I think I remember reading that the 2021 model added more inverted outlets and more solar. I'd start by tracing from the inverter to the auto transfer switch and beyond. A circuit sounder would be very handy if you can get your hands on one. There are several on Amazon relatively cheap...
https://www.amazon.com/s?k=wire+trac..._ts-doa-p_3_11

[RMcNeal]

Just re-read your post. If I'm not mistaken, the inverter power on mine does not go through the breaker, so you wouldn't have power at the breaker from the inverter. The auto transfer switch has two power sources, the inverter which it is plugged into and the circuit from the breaker panel. The auto transfer switch will favor this last power source when available.
When the inverter is the power source, the breaker doesn't come into play. Wiring it this way would back feed to the whole panel.

[rames14]

Paul, we need to know more info. The only way you have 7 inverted outlets is if you have the 400i system. If that is the case, then you have a larger inverter and your refrigerator should be on that circuit. Montana offers the 200i, 400i and 1200i. The 200i has no inverted outlets, 400i seven and 1200i all outlets. For help with your system, download the Keystone app and go to the Solar Flex tutorial. Also, join the Solar Flex page on Facebook.

[Paul M]

Thanks for the replies. I know 7 receptacles work in my friends camper and I was trying to figure out how power from transfer switch goes to the fridge and I get no feed back voltage to the distribution panel and the voltage to the general breaker is isolated.(that’s where the fridge gets shore power) It was prewired for solar and I’m adding 400 watts and was wanting the other recepticals to work. I know I can run another wire from the transfer switch to the distribution panel,but I was trying to use what’s there

[rames14]

So, let me clarify. You don’t have factory Solar? In that case no outlets are inverted. Your inverter is only 1000 watts, so don’t go crazy with outlets. Also, batteries. With 400 watts of Solar, you would want 200 ah of usable battery, preferably lithium.

[Paul M]

I know I have 200 ah lithium battery 400 watt solar, and was trying to get outlets working before I upgraded inverter, also on a 2k watt inverter the transfer switch is the same as mine,15amp. I compared it to another camper

[rames14]

Have you gone through the Keystone app? There were a number of units miswired. If you have factory installed solar, what is your Victron smart shunt showing?

[rames14]

http://images.ext.keystonerv.com/med...ers%20400i.pdf

[rames14]

http://images.ext.keystonerv.com/med...ide%20400i.pdf
This is the Quick Start Guide.

[rames14]

And this is the troubleshooting guide:
http://images.ext.keystonerv.com/med...ide%20400i.pdf

[rames14]

Also, Matt Wolkins is a contributing member on the Factory Solar Facebook page. If you join, you will also need your last 8 of your VIN.

[Paul M]

I have 14.6 out of batteries, I’m trying to figure out how they isolate the inverter power to fridge from the distribution panel.
I know that you when you install a transfer switch it goes to the distribution panel and it’s cut off when shore power is applied. Same as a transfer switch for the generator.The app is useless for advanced troubleshooting. I don’t do Facebook There are diagrams but Montana won’t share due to liability.

[Foldbak]

Check your inverter GFI. They may have bypassed the GFI for the refer and feed the remaining outlets on it. The inverter is on it's own breaker.

The inverter has a built in transfer switch. The shore power/generator transfer switch doesn't effect the inverter circuit.

[Paul M]

Thanks but I have 120 out the transfer switch

[Paul M]

My transfer switch is separate from inverter.
Everything is fine, I have 110 out of transfer switch to fridge. I’m trying to get the receptacles wired like they come from factory without requiring if possible. And can’t figure how they wired a receptacle with out it feeding back to the distribution panel general circuit breaker where the power is supplied to the fridge on shore power

[MandK]

Originally Posted by Paul M

My transfer switch is separate from inverter.
Everything is fine, I have 110 out of transfer switch to fridge. I’m trying to get the receptacles wired like they come from factory without requiring if possible. And can’t figure how they wired a receptacle with out it feeding back to the distribution panel general circuit breaker where the power is supplied to the fridge on shore power

I don’t know if this will help you, this is how my 2021 is set up. No solar, no generator, Montana, not HC.
Shore power goes to panel. There’s a breaker marked inverter that sends the power to the external transfer switch. That transfer switch plugs into the 2000w inverter. (There is no transfer switch in the inverter). There is a line that comes out of the transfer switch that feeds 5 receptacles in the trailer. When the power is coming into the transfer switch from the panel, it powers the five receptacles. When there is no power coming in from the panel (no shore power), the transfer switch transfers to the inverter to run the 5 receptacles as long as the battery switch to the inverter is on and the remote inverter switch in the trailer is powered on. The refer plugs into one of the receptacles. The other four are: bedroom to the left of the dresser, pop up receptacle on the kitchen counter to the right of the stove, TV in the living room and behind the theater seats.

[Foldbak]

Originally Posted by Paul M

My transfer switch is separate from inverter.
Everything is fine, I have 110 out of transfer switch to fridge. I’m trying to get the receptacles wired like they come from factory without requiring if possible. And can’t figure how they wired a receptacle with out it feeding back to the distribution panel general circuit breaker where the power is supplied to the fridge on shore power

Just trying to help....but your TS is for the Gen and SP, The inverter has a built in TS. As I said check your GFI.

[Paul M]

Thanks, but my problem is I have no receptacles on my inverter loop except the fridge, I’m trying to find out why. If there is a jumper or something missing in ac distribution so I don’t have to rewire