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Thanks for the input. I have a tap and die set arriving today, covers like M3 - M12, coarse and fine threads, figured having something on hand that will cover and bolts I might need to repair in the future would be good to have. Couldn't find and coupling nuts shorter than 10mm and those...

In some ways that would make sense but the internal mechanical connection would seem to make a better overall connection especially given the tiny shoulder are for contact with the busbar. I saw someone here describe the process but have no idea who or which thread. Pretty confident that the...

I’ve been doing a LOT more research into this including the video by Victron that makes the situation not look quite as bad as I feared. Also have a lot of pages open from their community and willpost ones I find relevant including any I ask to get additional clarification, especially given...

Wow, not sure how well I would trust welded on busbars partially because of concerns that they might not be sized for future load changes vs what they were when I bought them, issues dealing with a bad cell in the pack, issues if they aren’t seated correctly on the terminal during the welding...

thanks for reminding me about the cutting oil. I’m on the road full-time and all my tools and supplies are in storage so might not of thought about it and had to make an extra trip or a second order to get some.

Thanks, am familiar with lugs like that and actually did consider using them after seeing EVE’s new welded terminals but because these clamps down on cable I wasn’t sure about the connection. For this particular issue it could still be interesting just to eliminate or at least cut down on the...

That stainless steel nuts on stainless steel screws/bolts has a higher chance of damaging threads.

And based on comments found in other threads it also sounds like I’ll be better off with standard zinc plated nuts vs stainless steel nuts right?

based on the follow-up discussion regarding this, I doubt it’s something I’d consider given that when the battery power does kick in, it will generally be sucking 100-150 amps per battery pack.

Sorry not sure what you are referring to? My goal is to end up with a usable welded stud and attach the busbars some as you normally would, although I am leaning towards using a coupling nut instead of a standard nut that way it uses all available threads vs just a couple above the bus bar and...

It’s a 50 amp RV so there are 2 use cases, the power assist when connected to 30 amp shore power so we can run the RV without any fears of tripping the breaker in the pedestal and in the case of a blackout continuing to service our loads. Right now, I’m thinking I’m going to have to install a...

Another solution occurred to me to use a die to make sure the top threads are clean and then use a coupling nut, with their longer length they shouldn’t have any problems putting enough torque on the on the busbars even with no threads available on the bottom portion of the welded stud.

Nope, the threads of the laser welded on studs are stripped right off. They obviously are a very poor grade stainless steel if they actually are stainless steel…

Good point but if I’m going to have to get a second inverter I’m still going to be pulling that per inverter out of the bank. My system is going to use 2 packs and hopefully 4 by the end of the year. BTW, any idea why your inverter is pulling 284 amps at 2400w vs the 200 amps it should be...

Looks like the bad experiences with welded studs has bit again… My Lishen 270ah’s came with welded studs from the “group buy” organized by “he whose name cannot be spoken”… they were supposed to be M8 but only ended up being M6 and I’ve seen some comments indicating that they aren’t even quite...

Update, used my microwave and coffee maker while monitoring my 5er’s power consumption with a Power Watchdog RV surge protector and each used 1500 watts, so with the AC, TV and Apple TV, wattage jumped from 1800’ish to 3300’ish ?

I have the Victron and am testing it before actually switching over to it. Pros: It is dirt simple to install and configure It doesn’t require any extra electrical equipment to install It has the Power Assist feature for running on less than 50A shore power It can directly communicate with...

Thanks but it looks like you are using that for 12v power right? Maybe the picture is cut off?

Thanks that’s definitely useful as I was envisioning a wire. Appreciate the picture.

I wasn’t planning to keep the converter until I disconnected the batteries and realized our air conditioner/heater thermostats are 12v so if we lost battery power without a converter configured to run without a battery connection we wouldn’t be able to have AC or heat which could be a problem if...

The Progressive Dynamics PD4690 uses a “copper jumper” to connect the Battery Positive and Battery Disconnect Positive on the board to enable the converter to power the 12v panel even when the battery is disconnected when it is on shore power. Jayco didn’t install it in our trailer so...

I find pretty much all their docs to be lacking and their diagrams look like the were drawn using something like Microsoft Draw back from back in Windows 95. But the do have US support which is nice. The tech got back to me and there is actually a “copper jumper” that comes with the converter...

Interesting, the tech didn’t pick upon that at all even though I was clear that the battery had been disconnected. Progressive Dynamics PD4590 with Charge Wizard, but not the Charge Wizard lithium charging option. So if the converter is pumping out amps in excess of draw during charging, and...

Sorry, just to be clear, there is a breaker directly connected to the battery positive then out of the breaker the positive leads to the battery disconnect, then out of the disconnect to a set of 2 positive busbars. Are you saying that by having one, both or either of these disabled your...

The batteries themselves are connected together fine, the issue actually shows itself if I disconnect them at the battery disconnect or the battery breaker. On that line of troubleshooting I have asked the tech if the charging function of the converter can be disabled. I planned to follow the...

I haven’t started the actual install yet. I was disconnecting the old batteries so that I could start working on the 12v side of the wiring and when the 12v systems disconnected.

Thanks but the operative word was “test” which would include setting the AC input limit, verify it works with input power and fails over to battery and back again, battery charging etc. All require AC input to be installed. Appreciate you trying to post results from the Victron community that...

True, but in an RV there are a LOT OF 12v systems, everything from the lights to our air conditioner thermostats. Normally when plugged into power at a campground (shore power) there is a converter that converts the 120v input to 12v output for all the 12v systems and also charges the batteries...

Does anyone know of a reason why you couldn’t or shouldn’t hook a MultiPlus to a standard 15amp household circuit using an extension cable with the end chopped off for the AC input? We are having a problem with our on-board 12v converter which I think I want to keep as I quickly discovered that...

Sorry for the delay because I appreciate your timely responses, apparently I didn’t hit post reply but will include now that Amazon has completely f’ed up delivery of my items. Dongle and wire connectors were supposed to be here by 11am this morning got delayed to “by 10pm” now received notice...

Thanks for the link, I searched through it and didn’t see any functionality yet for changing the default battery configuration to lithium. I think I might just buy the MK3 and if I don’t end up needing it sending it back. Having Amazon Prime makes it easy.

Nice to know for others but I’ve actually had mine for almost a year now (second batch flown into the states) but couldn’t install it because a wheel on my 5th wheel trailer decided to go on its own adventure and the thing was in the shop for over six months thanks to supply chain issues...

The VictronConnect iOS app demo mode doesn’t have a “Multiplus II 3000/2x120” but has a “Multiplus 3000/120-2x50” which seems to have similar features (but definitely different) and does have the functionality for setting it up for lithium batteries, configuring the charge profile and setting...

Hey, so my head is a bit dizzy from trying to figure thus out right now and have had some unexpected expenses pop up so I need to quickly figure out the absolute minimum devices I need to get my Multiplus II 3000/2x120 inverter setup and running with my Lishen battery packs that each have...

(edit: started new thread here: https://diysolarforum.com/threads/minimal-parts-for-victron-multiplus-install.40709/ ) Hey, so my head is a bit dizzy right now and have had some unexpected expenses pop up so I need to quickly figure out the absolute minimum devices I need to get this inverter...