question

allen-cowan avatar image
allen-cowan asked

MPPT 150/100 decided to turn itself off! (fixed)

Okay, so let me start off with "I am ignorant." and I mean that seriously. LOL I will do my best to supply all the info I can, but the vast majority of this stuff is a mystery to me.

So, what I have is 6x200w solar panels feeding 2x300mah Life Blue LiFePo4 batteries through the MPPT 150/100. It's installed in my RV. I'll attach a pic of the general set up. It was installed by RV Solar Solutions. I talked to the tech who did the install, he's stymied and recommended I come here.

11 days ago was the last time the batteries (according to the phone app) got any charge from the sun.....which is curious because we've had a LOT of sun lately. I did not fiddle with the settings, and the MPPT is not networked. I've attached pics of the set up and what I'm seeing on the app.

Any help is GREATLY appreciated!


Not sure if this is relevant, but just in case......

The screen from the app.....

The message I get when I check "Why is the charger off?"...again, the BMS is not connected to the MPPT.


Thank you again!!

MPPT Controllers
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6 Answers
klim8skeptic avatar image
klim8skeptic answered ·

Has the jumper plug been removed from the mppts remote port?

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mrseas avatar image
mrseas answered ·

Have you tried "rebooting" the controller?

PV breaker to "off", then battery switch "off".

Turn it back on with "battery" first and then PV.

Can you supply "screen shots" of the Controllers setup screens?

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allen-cowan avatar image
allen-cowan answered ·

klim.....i doubt it, as I don't even know what that is.

mrseas....I don't know exactly which switches those are, but I did turn off both breakers (the dial looking red switch and the yellow switch below the MPPT) for a period of 2 minutes then turn them back on. Not sure of what order though.

I also don't know where I would find the Controllers setup screens. Is that on the phone app? Let me know and I can run back out there and get some.

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allen-cowan avatar image
allen-cowan answered ·

Okay, here are the various screens under Settings on the app




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Daniël Boekel (Victron Energy Staff) avatar image
Daniël Boekel (Victron Energy Staff) answered ·

Hi @Allen Cowan

as displayed in your first post, there are a couple of things mentioned when you click 'why is charger turned off'


Did you read what it says there? it says two things:

-check remote on/off terminal block if available

-see RX Port documentation:

https://www.victronenergy.com/live/victronconnect:mppt-solarchargers#rx_port_function



so change this function above, and or check for a jumper in the ve.direct socket.

And check for the wire bridge in the most right terminal block.


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allen-cowan avatar image allen-cowan commented ·

Mr. Boekel, I posted a pic of the MPPT. Could you point out WHERE there should be a socket? As far as I can tell, the only things going in/out of the MPPT are electric wires to/from the panels, batteries and switches.


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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ allen-cowan commented ·

The Remote ON/OFF switch is located here:


If you aren't using a remote on/off switch, then there should be a wire loop (as supplied from the factory).

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allen-cowan avatar image allen-cowan Guy Stewart (Victron Community Manager) ♦♦ commented ·

Okay, that I have seen, and there is no wire loop in it. What does this remote on/off thing do? As far as I know, I don't have one. I kinda thought it was supposed to stay on. LOL Is it possible it could have fallen out maybe?

Thanks for the visual reference, that is very helpful.

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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ allen-cowan commented ·

Remote On/Off allows the MPPT to be turned on or off remotely.

If the connection is broken, or the wire loop is removed, the MPPT will stop charging.

This can be useful for lots of reasons (such as an external Battery Management System that wants to stop charging to a battery that is full, too cold, or imbalanced).

In most systems, the wire loop is kept in place as shown in the bottom picture to allow charging (subject to the internal MPPT programming, or control via a GX device connected to the VE.Direct port).

The wire should be screwed in securely to prevent accidental removal.

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allen-cowan avatar image allen-cowan Guy Stewart (Victron Community Manager) ♦♦ commented ·

I am 99% sure there is no wire present on mine. I'll check again tomorrow to be sure.

Assuming it IS missing...will any old wire do as a replacement?

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Guy Stewart (Victron Community Manager) avatar image Guy Stewart (Victron Community Manager) ♦♦ allen-cowan commented ·

Yes, any wire is fine.

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allen-cowan avatar image allen-cowan Guy Stewart (Victron Community Manager) ♦♦ commented ·

Awesome, I'll give it a shot tomorrow then. Looking at the pic, I wonder if maybe the battery shifted and dislodged it?

Anyway, thanks!!

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klim8skeptic avatar image klim8skeptic ♦ allen-cowan commented ·

The manual has a description of the remote port function on page 7.


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allen-cowan avatar image allen-cowan klim8skeptic ♦ commented ·

LOL It might as well be written in Sanskrit. I'm not an installer or techie or anything like that. Just an RVer who wanted to be able to avoid campgrounds.

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allen-cowan avatar image
allen-cowan answered ·

So after moving the batteries a bit, sure enough there is a plug there. I assumed maybe it had been severed or something but when I went to look at the app, it showed the MPPT was on and had been on since sometime yesterday!!!!


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