Victron energy multiplus-2, DO NOT MAKE THIS MISTAKE.

In a previous video before we went to Daytona Beach bike week I had installed a Victron energy Multiplus 2 3000 watt inverter. while in Daytona we had an issue with the terminal blocks connections overheating and melting the blocks away. I contacted Northern Arizona wind and sun and they authorized a warranty through Victron energy. So now I have a brand new unit and I'm going to make the necessary corrections to hopefully prevent this failure in the future. Although this is not a common problem with the Multiplus unit, I'm hoping that I can share my experience and prevent others who may install this unit to avoid making the mistake that I made. Below is a link to the original installation video.

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[emeryhvac]

easy life a of motorcycle vendor lol. Really cool that the company stepped up and warrantee the system. That says a lot about their business ethics. Good stuff man!

[JoeDplummer_]

I'm buying a Victron inverter for my solar off-grid house, and I appreciate your advice, which I will observe carefully. Thank you!!! 👍

[xzaros]

This is a great video, you never know you could have just saved our lives, fitting ours to our boat next week

[bmppc]

FYI: Ferrules are for fine stranded cable, the cable you are using for AC OUT does not require a ferrule and will likely be detrimental to connectivity.

[DavidBowen]

Very good video! thanks for sharing. I'm about to install one for a friend and since I have the original I had no idea they changed lug input on the AC side.

[CoolMusicToMyEars]

Definitely a New PCB on the Old Unit is required, That's totally amazing that they covered that on the warranty 👍 Victron is the unit I like but I go for a Quattro 15, 000W 230V unit 48V with Victron MPPT 250V/100A terminal type Victron or BYD Batteries

[kimgaugemusic]

I learned a valuable lesson! Thank you for posting !

[mgeb]

Two small things, if you have wires without a solid core (which is common in Europe for cabling) always use ferrals if you don't have special connectors like eg. Wago clamps. As for crimping I preferr the hexagonal crimpers, create cooler connections here.
And the most important one, if you have connections that are loaded to or near max, use an IR cam to make a quick check... They are cheap compared to the equipment that burned up and you can also check if cabling is ok (it's perfectly fine if it's just a usb ir cam that you attach to your phone)
Btw... If you'd use the victron quattro you can have your backup generator automatically used.

[richardhoneywell]

Great video Adam thanks for sharing stay safe 👍

[SihAza]

The same or similar terminals are used in industrial automation wiring from Phoenix Contact, Wago, Weidmuller, and Weind (all German I think), w/ Phoenix known for green. You can use crimped ferrules (I do), mainly to avoid a stray strand sticking out, but most electricians insert the bare stranded end. I use ferrules w/ a plastic collar (Digi-key catalog). Even with a ferrule, I never just push the wire in, rather hold the spring open via thin screwdriver in the release slot, as you did on this 2nd pass.

I recall the spring-cage type are usually only for ~10 A max and ~16 awg wire. For power wiring, the terminals usually have a screw clamp. Seems a bad choice for Victron to use spring-type for such high currents. I would worry as the system ages and the wires corrode.

[ethanclement]

The manual for the multiplus II clearly states input and output connections are to have ferrule pin crimps applied to the ends of the cable with a length of 0.7 inches. But they're not stating that what you should really be using is finally stranded wire like the SOOW cable you have for one of your connections. You don't force those cables into the spring connections you should release the spring tension with a small flathead screwdriver first, then insert the wire with ferrule crimps on it into each termination and release the spring. This has got to be done correctly or people are going to start having fires.
I think people have gotten lucky. Keep in mind that this is a European design and in Europe wiring is not done the same way as here in the United States. Everything is 240 volts or higher and therefore wire size is typically smaller for delivering the same amount of wattage.

[sullytrny]

you clamped the insulation, look old red wires clean for 1/4in

[jdofupo]

I wouldn’t use ferrules unless manufacturer called for them. I have tinned the wire/cable ends that go into the connector on that unit. The result is a very low resistance connection

[davidpatrick]

Anther tube said the feral will stick inside and the wire will pull out ... if you want to change the leads.... ruining the green connector. I wonder what they say about using dielectric on it. If you go back to 9:26 you will see the red and black wires are different than later. I wonder if that was that way on the original and something may of gotten crossed.... I think it may be it doesn't make a difference.

[JonOffgrid]

👍 i been looking a Victron i thank i will get a growatt 12 kw they have batter logs

[nuclearbox]

that 7 strand 6/3 solid romex definitely doesn't need a ferrule, it will just eventually get loose and fall off without soldering. But the fine stranded marine wire did need the ferrule.

[michaelpariseau]

I bought a Victron Multiplus II from Battleborn Batteries in March of this year. Installed it in my rig in April. Started camping in May at a frequency of 5 days camping and 3 days home, so been giving the rig a fair amount of use. 50/50 dry camping and hookups. We are currently camping and are going through a heat wave as is most of the country. The AC has been running a lot. Yesterday, I went to the store while my wife stayed with the rig. When I got back, she told me that everything turned off in the rig, then came right back on again. I took a look at the Victron app and saw that we were inverting. Checked the shore power and it was fine. Opened up my multiplus and found the neutral lead of the input terminal had fried. No other lead was affected.
My question is, has your second unit been okay with what you did to try to prevent the problem again?
I do not think that you or I had done anything wrong. I had about 5/8” of bare wire in that terminal. I think it’s simply a very poor design. It needs screw down terminals, period. Sorry for the long message.

[oggyyears]

Great video and interesting approach to solving the problem.

Instead of using ferules, why not solder and tin the tails. Wouldn't this method give less resistance and heat than using ferules. This is just the way I would do this, but it may not be the best method.

[scooter]

Good Idea for this video. I know you will be using this if this happens again 😊.

[MrMr]

You might want to get an infrared camera to check all your terminations... loose connections and not torquing your lugs will cause this