PowerWall AC wiring. Daisy chain a Phoenix and Multiplus inverter.

[@andrewradford3953]

Your enthusiasm is infectious. Erika keeps saying good morning Andy as I usually have you playing when I materialise for breakfast.

[@OffGridGarageAustralia]

You materialise for breakfast, wow! Guten Morgen Erika!

[@skoto.power.systems]

Awwww Andy, you always find a way to make me smile and happy whenever I watch your videos. Thank you so so much , God bless you always and forever keep you and your family safe .

[@gumpster6]

That wall of power is looking great! I have to live vicariously through you as I'll never get to play with toys of this sort.

[@Ruudi05]

Thaks Andy you set the DIY home offgrid build quality level high, thanks for that. I will try to keep up with your standard when rebuilding my system.

[@OffGridGarageAustralia]

I'm trying to inspire others building their own system. I'm experimenting a lot and see what is working and what is not, learning from mistakes and also show these in the videos so others can benefit from it. Again, this is just my personal installation and project but if people take ideas here and there, that would be fantastic. I also love the feedback I'm getting when I ask questions. So much to consider when building this...

[@marcelprivat]

Schön zu sehen wie viel Spaß Du hast. Das macht gute Laune und ich hab Spaß Dir zu zusehen. Daumen hoch.

[@OffGridGarageAustralia]

Klasse, danke Dir!

[@excillisbank2611]

Superbe évolution de l'installation ! 👍

[@petertrebing6875]

Danke!

[@OffGridGarageAustralia]

Vielen herzlichen Dank, Peter!

[@danfitzpatrick4112]

Very professional looking Andy! Absolutely love great workmanship.. Thumbs up brother!

[@OffGridGarageAustralia]

Thanks a lot Dan!

[@dennis_m]

I think the same battery cable length requirement is for those who have connected the inverters in parallel, e.g. two 5KVA inverters in parallel to get 10KVA output etc. They should also go through the same breaker (or linked) I guess. In this daisy link micro-grid style connection, it is not necessary, as you said. Anyways, thanks Andy for the update. Great video as usual.

[@Shep5847]

Cable length being equal is important when more than one inverter is paralleling it’s AC outputs. This is to make sure that when discharging (and charging via inverters) the amount of power going to/from the battery bank is the same to/from each inverter. The same goes if you built multiple battery packs and put them in parallel to a busbar. You want them all to have an equal distance from the busbar so that they are all evenly discharged/charged. Also, when paralleling inverters, you also want to have the AC output lines equal length to their first termination point for the same reason.

[@IPad-OG]

You are correct about the cable length and the parallel setup. By keeping them the same length, you keep the resistance the same. And that is important because you want the load to be split equal. If one cable (path) has a significant lower resistance, the energy will prefer to “flow” through that path creating an uneven load on your two inverters. That is also the reason why it’s not advised to oversize the cables to much. By doing that you will create very low resistance values. And in that case a small difference in resistance will mean a large difference in percentage. About the breaker part. No. Breakers and fuses protect the cables and the equipment behind it. Even in parallel setup, they should be fused independently. Anyways, I agree with you that I also don’t think the cable length matter in this daisy chain setup. They are sort of two different systems.

[@IPad-OG]

@@Shep5847 Will actually just made a video about this (more or less) about the different cable configurations with multiple batteries. And I believe he will release even more. Now that I think about it, it might even also matter for 3 phase setups due to the shared neutral.

[@OffGridGarageAustralia]

I don't think the cable length matters at all. With parallel inverters or even 3-phase setups, the inverters are communicating and if one fails or has a low voltage disconnect (due to a longer cable) they will all shut down. Of course it can be beneficial to prevent that by supplying the same voltage level but on the other hand how often do you drain you battery so that the inverter shuts off? If this is frequently, you may want to start thinking about more capacity...

[@Shep5847]

@@OffGridGarageAustralia Sounds like a good experiment in the making! 😊

[@wayne8113]

Thanks Andy, Looking good !

[@williamhustonrn6160]

When they say keep the DC wires equal when using them together, they are referring to using them in parallel. If one has a longer cable than the other, it will have a higher line resistance, thus less of the load will be split to that unit and more will be placed on the shorter cabled unit. Running them in parallel with equal length cables assures that they are sensing the same voltage within a margin of error and able to load balance properly. This is how they are running on my sail boat, i used a busbar with equal length cables to assure equal loading.

[@OffGridGarageAustralia]

I would say, it does not matter in a parallel configuration either. The inverters will pull as much DC power as they need to supply the load. If one cable is longer it just has a lower voltage and therefore has to pull more amps to get the same power. But the output power of the inverters will be the same (if they run synchronised).

[@williamhustonrn6160]

@@OffGridGarageAustralia That is not completely true, i don't have the exact model victron units as you, but when you run un-equal leads to them in parallel, the load balancing of the units is not done properly, even if they are connected via canbus to communicate. They seem to use voltage sensing delta a form of load balancing and it often will load down the unit with the least resistance path first until the voltage under load is equal between the units, then the other starts acquiring load. The larger the voltage difference between the units, the more the load is placed on the lowest resistant path unit. A simple way you can test this is by adding a resistor inline of one and load it up and watch the amp difference. You will see little to none being loaded on the unit with the inline resistor until the load can overcome the difference.

[@evil17]

That is probably right Dennis & I agree with Andy’s reply as usual, I do like Will, & do believe you will see him come out with some more vids on this before long, But I dont know about the remark about oversizing of cables or conductors in this scenario (electronics maybe has cases for it), I always thought for this type application, the heavier the cables/conductors/busbars the better, & leaves more room for future proofing to a bigger system maybe later if one craps itself. Andy has been mindful to do this throughout this construction process & I think that’s prudent, ‘Tis better to have & not need, Than to need & not have’, they say. Good vid, Thanks

[@SoundzAlive1]

Hi Andy, The inverters connected in parallel need conductors of equal length so they can sense the same voltage so they can operate at the same time.So when one has done charging the other has finished charging. Also, when one shuts down the other shuts down at the same time. Any difference in resistance in the cables will be realised by both inverters. André

[@pmacgowan]

Looks very nice, makes my OCD happy

[@OffGridGarageAustralia]

That's great Paul. It' all about one's personal OCD 😊

[@geerthaemelynck1126]

Pulled this from the manual for the 3kva multigrid-ii (4.3) : AC-out-1 The AC output cable can be connected directly to the terminal block ‘AC-out’. From left to right: “N” (neutral), “PE” (earth) and “L” (phase) With its PowerAssist feature the Multi can add up to 3 kVA (that is 3000 / 230 = 13 A) to the output during periods of peak power requirement. Together with a maximum input current of 32 A this means that the output can supply up to 32 + 13 = 45 A. An earth leakage circuit breaker and a fuse or circuit breaker rated to support the expected load must be included in series with the output, and cable cross-section must be sized accordingly. From the manual specs (5.1): AC input current limit 32 A for 3kVA and 50 A for 8kVA and 10kVA (= adjustable current limit for PowerControl and PowerAssist functions) Also turn off the charging feature of the multiplus, otherwise it will try to charge the battery from the AC-in...

[@OffGridGarageAustralia]

It's the same text as for the Multi 5kVA so we will see if this is somehow limited to 3kVA for the PowerAssist. I would not think so, but let's see... Yeah, the charger needs to be disabled as we are not connected to the grid and both inverters are being fed from the same battery. I'm really excited about his experiment.

[@kswis]

From what I've learned at this point, equal length dc cables are important but in your specific case I don't think you'll have issues. I'll tell you one thing I do know, it'd be a cool experiment and we would all learn the answer to your question. And being in the past, present, and future at the same time makes perfect sense lol

[@jackoneil3933]

I tend to agree, cable length is more important in AC Phases than DC parallel service conductors unless significant voltage or inductive losses are induced.

[@giuseppevillella9445]

Ciao amico è sempre un piacere vedere i tuoi progetti off-grid in upgrade

[@OffGridGarageAustralia]

Molte grazie e resta in carica

[@vickipps6821]

Thank you Andy you have made a real professional job I hope min turns out the same

[@OffGridGarageAustralia]

Just pick some good ideas and feature of mine and make yours even better!

[@vickipps6821]

@@OffGridGarageAustralia than you for that advice I see you are just like me there is only one way that's the right one and we are a little bit of perfectionists have a great day or night as we ate on opposite sides of the world

[@jean-denislamarre1560]

Love the final words :-)

[@unimog404]

That is such a nice setup! I think my next camper setup also will get ducts. This weekend I wired the 230 side together with my brother. 2 circuits, the phoenix 2000va is wired to a 3 socket bar with earth leakage breaker. And the outside CEE with the same breaker and power bar. The 70mm2 battery cables are in. Now I only need to install lithium batteries 🥳 right now everything is running of a 100ah AGM. It's good to test everything before adding more items.

[@OffGridGarageAustralia]

I cannot see these ducts any more! TOO MUCH.😂 Yes, do small steps and make sure everything is working as it should be!

[@evil17]

Lovely work Andy. I have 2 x 24v 2.4kw (cheap) all in ones for a 40’ bus I have up nth, & 2 x 5Kw 48v systems as well for another house and shed (not so cheap, but cheap) , haven’t got up nth to finish 24v setup yet, but have done some tests and these seem like a good, easy, cheap way to go for RVers with a server rack type battery setup it makes it so easy for the newbies too. I like this setup u have here where one can call up the other for extra output & redundancy. I believe most of these all in one systems can be configured in this similar manner as a backup generator they could be daisy chained to some degree as they sense the input voltage and waveform and match it for the output, which is what I am about to try with the Bus, So hope I dont get any of that magic smoke. Thanks for another great vid!

[@SzymonHawlicki]

Hi Maybe option "D". ? Unfortunately, it involves a lot of work because you have to drill holes more or less at the height of the connection. So half of the holes you have now will be unused, but good for the future. The advantage will be: - shorter DC cable (lower losses) - the cover will continue to fulfill its task - clear connection (easier to diagnose) - easier handling (no need to bend the cable) Best regards from Poland 💪

[@jamest.5001]

I'm from the 70's, unfortunately I'm stuck there also! Haha 😆

[@Mazlem]

Wow, all this time and you've managed to keep stayin' alive, stayin' alive!

[@anthony_4570]

Andy I enjoy your videos and have learnt a few things along the way long anyway my comment is towards your ac distribution box you have three buss bars the long one on the left is the earth buss bar and the two shorter onces on the right are the neutral buss bar and that bit you undune is just a link to link the two neutral buss bars together if you have a look at the buss bars you will see that they are stamped that way

[@OffGridGarageAustralia]

Thank you. I have always seen that people used the shorter ones for ground, so not sure if this is a general rule to use the larger left one for that?

[@texciler]

Hi Andi! Regarding the "same DC cable length": It is especially important when you parallel multiplus units (ac out in parallel). Lets say you take two 5kva inverters in parallel, you want to get 10kva output, right? If you have diffent cable length and are drawing full power (~100-120A) both units will see a slightly different DC voltage and therefore draw a slightly different current. the one with longer cables has lower voltage and higher amps... higher amps meens higher voltage drop and so even less voltage and even more amps (i could continue but you get the idea, right). In the end this meens the load will not be evenly distributed across both multiplus units and you will probably never reach 10kva... at maybe 8kva the unit with longer cables will go into overload and eventually switch off both multiplus units. In your daisy chain configuration you will have no problem with different dc lengths as both inverters are "separate" systems. in a 3-phase configuration same cable length are not that critical as in parallel configurations (as the load will be different on the phases). But if you have 3 5kva units in three phase config and have different cable length you might not be able to run a 15kva 3-phase load. I can highly recommend the wiring book from victron! It is explained very well there www.victronenergy.com/upload/documents/Wiring-Unlimited-EN.pdf Greetings from Cologne! Andi

[@edwardvanhazendonk]

Very nice and tidy installation, well done!

[@OffGridGarageAustralia]

Thanks! 👍

[@NaughtyGoatFarm]

Good work mate. Looks awesome.

[@OffGridGarageAustralia]

Just installed the full battery shelf and reconnected everything. Another 3 days of work into this project 🤦‍♂️I could have been sitting next to the pool and having a SPAT instead. I guess this comes later...

[@Dutch_off_grid_homesteading]

Heya, that looks very very nice great job

[@awesomusmaximus3766]

You're doing a great job

[@OffGridGarageAustralia]

Thank you.

[@Remigius0815]

Hau rein !!

[@OffGridGarageAustralia]

💪

[@johnsteamer828]

Sweet

[@TheDowe]

I would make new holes a bit lower so the cable go streite inn to the terminals.

[@michaeldudley7840]

Thanks!

[@OffGridGarageAustralia]

Thanks a lot, Michael. That is a very generous support🙏

[@helmo5663]

Hi Andy, Your Powerwall looks so good. I like it! PERFECT! really The only thing I notice is that you didn't keep the 10 cm distance recommended by Victron for ventilation around the MP2. The conduit at the bottom is too close. I don't think it matters, because you have the lower right half free. But still, if you are running at full load, the Multi needs a lot of air.

[@OffGridGarageAustralia]

Thank you 😁 The distances around the devices are not too critical from what I gathered. I looked for Victron installations on the web and a lot of them have the ducting directly adjected. The vent opening for the MP2 are actually around 50mm off the backwall so perfectly situated for my 50mm duct. They start right where the duct ends.

[@jamest.5001]

If the inverters are acting as one, the cables should be close as possible to equal length, and Short as possible also!

[@jamest.5001]

Can the negitive gland be moved, so the cable can go straight to the buss bar? If no, I like the up up and over, route best!

[@striker2k1982]

Mega Oettinger in Asutralien :D

[@OffGridGarageAustralia]

Wenn alles fertig is gibt's schoen 🍺🍺🍺

[@laurentduclos6138]

Hello Andy, thanks a lot for the f...ing number of very interesting vidéos. I try to watch almost all of them but no more vacation days to use. Did I miss a vidéo or is there a vidéo in which you describe in detail (like always in your vidéos) the Multiplus 2 parameters used with the JK-BMS and VenusOS ? Thanks for your answer

[@earthenergyhex]

what will you do when the garage is complete?

[@pcMuneer]

Great work. 👍

[@OffGridGarageAustralia]

Thanks ✌️

[@pcMuneer]

@@OffGridGarageAustralia I have tried to follow your steps, Unfortunately customs department of my country doesn’t permit shipments from AliExpress / Alibaba ! I am a regular viewer of your videos and We have an active telegram group of solar / green energy enthusiasts with 1700+ members in our state and many of them are your fans. We used to discuss about your innovative thoughts and experiments. Keep up the good work cheers from India 🇮🇳 SPAT 🍺✌️

[@OffGridGarageAustralia]

@@pcMuneer Thank you very much and what a shame you cannot import these cells. Some people from India were successful in importing them though. Wonder what the process is. Please say hello to everyone in your Telegram group from me and thanks for watching. Stay charged!

[@BrazzaB1]

I would have put the junction boxes between the inverters to reduce cable lengths.

[@OffGridGarageAustralia]

The length of the AC cables is not so critical, they can be really long without having any significant loses. In such an installation it doe not matter at all if they are 1-2m longer or shorter. The DC cables are far more critical as the currents are much higher and therefore the loses.

[@longdistancerider691]

the cable length for the inverters this way will work well in my opinion but for the batteries to the bus bar must be the same lengths, to charge and change them evenly. best practice is to first put the positive cable together with fuse etc. on the workbench and then cut the negative cable evenly.

[@OffGridGarageAustralia]

Ah, right, so this rule is more for the batteries to ensure they are charged at the same rate. OK, that makes sense if you have longer cable runs to the batteries.

[@BajanAlan]

There is another guy with a funny accent, his name is Albert Einstein. I think u should leave mucking around with time to him!

[@igorkvachun3572]

Yes👍⚡ 🔌💡🔋

[@krismiio6051]

Respekt. ABER NOCH MEHR RESPEKT an dein English. Echt super!

[@OffGridGarageAustralia]

Danke Dir!

[@Trent28888]

Its only to do with the resistance havin the same length wire but also a few milliohms difference can be the difference between wire gettin warm and not gettin warm but depends on the current draw it could be a few amp less aswell

[@enlightenedDiamond]

Hi Andy, I'm planning on a similar setup using a 5kVA Multi on passthrough with a 15kVA Quattro as the 'generator' as per your setup. My Quattro will be permanently on, except for when there's not enough solar in to fill the batteries through the day. In that instance I'd turn the Quattro off to save the standby current. Those big Quattros have terrible efficiency compared to a Multi. What I'd like to see is the programming of the multi in your setup. Is there a subsequent video to this, or can you share the config file? I'm fine with the AC distribution.

[@easylawncare]

I dropped the side cutter's man 😔 where did they go? 🤔 😂

[@uziman3800]

Cmon Andy, where are your 45deg mitres on the corner of your ducts? Only kidding, looks good.

[@OffGridGarageAustralia]

I knew someone would say something 😂

[@551moley]

I assumed the cable lengths being the same is really for parallel inverters, in my case two 3kva's, a master and slave, to keep the power balanced between them, I've kept equal lengths on the ac and dc sides. It's a pain in the butt really because you can't use only one without changing the setup software.

[@OffGridGarageAustralia]

But they should have a communication cable between them so cable length should not matter either side. If one shuts down, they all shut down.

[@cods41]

Hi Andy. I went to use some of your referral links on your website to buy some tools and testers, but some of them seem to be broken. The items are no longer available. Might be worth updating them sometime.

[@OffGridGarageAustralia]

Thanks a lot Matt. I'm doing it right now. Should be all updated in 30min again. Great support, thank you!

[@davidpatrick1813]

How did that no ground to the multi plus chasse work out? It seems the "non interrupted" aspect may have a problem ... If the AC power in is lost (via power outage, tripped breaker) then the line would be "interrupted" ... and the ground lug (to the ground rod in the ground outside etc.) would have to be there.. I am having problems with my system and think it is related to the grounding. Some of Victron diagrams have the negative of the batteries also to the ground rod outside ground.. thus to the chassis ground.. but they make the unit so the the negative of the batter post does not connect to the chassis ground ... so that is why I am here to see what you come up with. pat oregon usa ...

[@alltron66]

I currently have a Powmr 3500 inverter/charger/mppt and need a little extra power now and then. I am setup for 24v ideally but was looking at the 24v 3000w version of multiplus 2 and use current Powmr inverter as generator. I see the 48v multiplus is a bit cheaper. Is there any super advantage of going 48v over 24v? I guess if I was going 48v I would get 5000w multi and abandon current 24v inverters I already have but would also need to upgrade solar controllers which starts adding up. I hope I'm not asking a loaded question by saying does anyone have any suggestions?

[@roaridse]

Have you considered to use the output2 on the multiplus ? If the phoenix inverter cuts, this will also cut. this might be at least a nice place to connect the ev charger or other high demand circuits, to avoid a total blackout. (this is based on the outputs on the victron quattro, I will guess this is the same on Multiplus)

[@OffGridGarageAustralia]

The AC-Out2 can be programmed. As you described it, this is the standard setting but it can be changed in the config to whatever you need it for. I'll show this once we have the Multi connected.

[@BobHannent]

If you're chaining the inverters, does the MultiPlus have enough pass through capacity to handle the second source? When I've looked at hybrid inverters their pass through capacity is less than 1kW more than the inverter can generate. In regards the DC cable length, I suppose there's some logic about wanting to ensure that the inverters draw power equally but it may also be about voltage sensing? If the two inverters disagree about the voltage of the battery that might cause some issues? I suppose the answer is that both inverters should go equally to a bus bar and then that bus bar goes to the battery/source.

[@OffGridGarageAustralia]

Yes, the Multi has enough capacity and can handle 50A (11.5kVA). Both inverters will get their voltage reading from the smart shunt as a central unit.

[@pteepan2708]

ANDY, I love your videos and I'm your #1 fan ....RIGHT? but is it possible to ask Will Prowse how he compresses his videos. I live in the Bush 147.3 Klms(I don't really know that it is 147.3k) south west of you in N.S.W., I mention this because I'm off grid and on Satellite internet so Data, Bandwidth is a big deal. will's video 17:18 43.8mb MP4 720p 25fps your Vid: 19:19 107mb MP4 480p (I don't see the FPS) P.S. 5 points to Andy for not using frozen peas to test cold temp cut off and using SPAT 5 points to Will for awesome vid compression, come on Andy I have faith in you, beat Will on his compression skills. ALTHOUGH, I might be your only subscriber who this stuff matters, so I fully understand if NO changes are made.

[@Browneye2566]

Yes mate - just yes!

[@DanBurgaud]

Why can't you parallel? Is it because: a) they are of different models? (different software, features, etc) b) or Victron does not support parallel?

[@longdistancerider691]

ANDY ANDY wat i suddenly think is, you have 3 AC output s on the MT2 .. AC1 AC2 and ... the load in the grid when you batteries are full . you can avoid this for 99% by installing EES. and counter this white grind setpoint . and I tink you Works like this it is the last investeer that determines the wants . so I tink 5 kw

[@OffGridGarageAustralia]

The ESS system is not for off-grid though. I won't be connected to the grid at all. There is no physical connected. I can plug in a charger and charge the battery from the grid if solar is not sufficient though, but that's a manual setup, not automatic.

[@longdistancerider691]

@@OffGridGarageAustralia ok , but i think that the MT2 is going to think your Phoenix is the grid. you plug in the phoenix where normally the grit comes, how are you going to say it's not the grid?? and how are you going to say when the batteries are full that MT2 is not allowed to push towards the Phoenix (grid)?

[@OffGridGarageAustralia]

@@longdistancerider691 I will configure the Phoenix as a 'generator'. The MP2 will start and stop it as needed. That's one way of doing it. The other one would be the smaller Phoenix is running all the time and the MP2 only adds energy if the Phoenix outputs more than say 2kVA. We can configure both scenarios and will see which ones runs best and why.

[@longdistancerider691]

@@OffGridGarageAustralia ok , more filming , great

[@stili774]

How many Volt do they Produce in the night?

[@OffGridGarageAustralia]

Always 230V, 24/7 😁

[@stili774]

@@OffGridGarageAustralia No, i mean you have one string that produces even in the night 40V. So you should also see with the new inverter some Volts at night ;)

[@jameshancock]

Resistance when paralleling inverters one will draw more than the other if not the same length. (Or at least close)

[@OffGridGarageAustralia]

They will draw as much power as they need to supply the load, regardless how long the cables are.

[@jameshancock]

@@OffGridGarageAustralia but the draw will be uneven between the batteries based on the total resistance. This is really obvious if you put a lead acid and LiFePO4 in parallel. The lead acid won’t have any draw down at all until the LiFePO4 is massively voltage imbalanced. It’s even more pronounced with LTO. If the resistance is similar than the draw will be proportional as you suggest because it will naturally seek voltage balance. But as soon as the resistance is uneven then you have a 2d problem of v=ir because it is drawing amps and you’ve got 2 uncontrolled variables. Will prowse accidentally proved this with his parallel videos with the wire placement. The reason why his last battery discharges less than the first is specifically because the total resistance is more even if the batteries are otherwise identical.

[@OffGridGarageAustralia]

@@jameshancock OK, that might be a problem when using different battery banks for the inverters but if they are connected to the same battery it should not matter. I guess that would be a great experiment...

[@jameshancock]

@@OffGridGarageAustralia will just did it. The length of the wire directly controls how much each pack in parallel discharges because of resistance. Bus bars mitigate the problem enough that it isn’t much noticeable because there’s just so much more solid and nearly pure copper, but wire matters a lot. Power (current) flows preferentially and always through the lowest voltage divided by resistance. That’s ohm’s law.

[@westking7746]

Hmmm... The ability to exist in two places at the same time, or different times at the same time? A twist on quantum superposition? Time dilation? A combination of both? Hmmm...

[@SzymonHawlicki]

As for the length of DC cables, it is probably about voltage drops. If the voltage is very close to the low voltage emergency disconnection and the length of the wires is different, the units may turn on / off not at the same time. Which can cause various weird AC side situations depending on the load.

[@1978jra]

With 3-phase or with paralleling inverters are connected together via communication cable so they will turn all off simultaneously, but you are right without synchronization that would be a problem.

[@NB-ld1qt]

Hi Andy, just worked out you live in Brisbane as I do. Would be great to pay you a visit some time if that is possible. Cheers Neil

[@OffGridGarageAustralia]

I'm not in Brisbane, Neil. I'm from the country side 🤠

[@kajitis_1]

According to Victron you require to have same length of DC cables from busbar to inverters if they are coupled in paralell. Oherwise there is no reason for it. From busbar to battery same length of cables for paralell banks (2 or more batteries).

[@servisfibris6679]

exactly!

[@OffGridGarageAustralia]

But why? Isn't the inverter with the longer cable just pulling more DC amps (due to a lower voltage) to get to the same output power?

[@kajitis_1]

@@OffGridGarageAustralia True. But there is no problem/contradiction in that.

[@udenchandana]

Hw to multiple On-Grid fimer 3kw and off grid victrem 3kw need digram

[@keithcress1335]

I'm unclear if you're tying the outputs of your two inverters together. If you are then you should have exactly the same length DC cabling. The smallest difference will shift the sharing balance considerably, by many percent. Consider if you have two large batteries that are merely 0.1V different and you connect them together in parallel with a foot of 2AWG wire (6" plus and 6" minus). The cabling would represent 156 microohms. 0.1V / 0.000156ohms = 639Amps would want to flow between them. It probably wouldn't because of the internal battery chemistry resistance but it would try. The same sort of thing is happening with the inverter output stages. The one with shorter DC supply cables would be inverting to a higher voltage (by the step up ratio!) than the other inverter and hence would supply the lion's share of the power into the shared load. If the load is not shared you're correct the DC lengths don't matter.

[@Oekologisiert]

AC Out 2 on Multiplusses behave different than you explained. They are turned on as long as there is mains on AC In. AFAIK there is no way to only turn AC Out 2 on only if the is exess energy from solar. Maybe you can achieve this with some kind of MQTT messages via an external logic, viele Grüße auf good old Germany

[@moth3rfck3r-s4n]

You can program AC Out 2 to do whatever you want with victron software. I have the same inverter and programmed it turn on AC 2 when the battery voltage is low and off when the battery is fully charged.

[@Oekologisiert]

@@moth3rfck3r-s4n ohhh .. that's interesting ... i operate a 3 phase victron mp ess sysytem and never stumbled across this option ... thanks for commenting .. i need to investigate as this opens a whole lot more possibilities .... you can whatch me on my channel kzbin.info/door/1aHZTaGN8m48BBYjB_UsoA but it's a german channel about DIY Solar and batteries, mostly victron based

[@OffGridGarageAustralia]

Interesting programming. Why do you turn AC-out-2 on when the battery is empty. Would this not add more load to the empty battery? What's the purpose of that?

[@Oekologisiert]

@@OffGridGarageAustralia i currently don't use AC out 2. I use home assistand and the MQTT integration to publish controll messages via mqtt, with that i can e.g. limit the inverter power output, charging parameters etc .. depending on what's going on in the house. currently i'm working on automation in home assitant to charge the M3 only with excess and only if house batteries are full, and wifes EV (leaf) is charged full, she charge with the brick charger from nissan and i controll the charging via a Schütz (kind of relay) quite nice as we also have a water bed and i don't want to sleep cold just because of the car charging ;) sufficent power is mostly only a question of timing and control! and here comes victron with it's great "openess" and posibilities in place ...

[@OffGridGarageAustralia]

@@Oekologisiert you could use the AC-out 2 for charging the LEAF for example if this sits one a separate circuit. But MQTT is more flexible, I agree.

[@upnorthandpersonal]

Question: in the new Australian code the Neutral conductor is supposed to be blue, black is used in old systems (and brown for L1 instead of red in the new code). Why not use the new standard?

[@OffGridGarageAustralia]

These are the cables they currently sell.

[@habana7638]

The definition of cables seems in AU is slightly different than in the EU..

[@jackoneil3933]

Nothing like a 79 amp day

[@OffGridGarageAustralia]

Especially when the amps are coming from a used solar system...

[@jackoneil3933]

@@OffGridGarageAustralia Yup that's cool.

[@philipps1646]

timetravel is always a mess

[@OffGridGarageAustralia]

I'm so confused 😉

[@bbrown_sc]

Why don't you just drill the exterior hole lower and go directly under the plexiglass shield from the backside?

[@OffGridGarageAustralia]

There is not enough room for that.

[@idontneedaname85]

I just got 72 amps from my 3.8kw array! Sad how you lose your sun while us northerners gain sun.

[@opless]

30th! 😂

[@JerrePictures]

Andy , Sorry I react here to a previous video. I FOUND A SHORTCOMMING loved your idea of placing a shunt before the BMS. But I found out if you place the shunt before the bms, and you take the positive directly from the diy batterie to read out the exact voltage. Then, when you decide to power off the system with a breaker, the breaker must be placed between the shunt and the bms AND the batterie and the shunt. Otherwise, there still will be curent flowing true the positive cable to the shunt and it follows to the negative of the shunt to the batterie if there is a braker it will follow to the BMS and USE THE BALANCE LEAD that is connected with the battery negative (at least with Daly 🙄) that is not all if you restart the system I even get current flowing while the positive was turned of by a batteryswitch i get a reading of 5v behind my victron battery protect( again while the batterie positive was disconnected) ????? Or did you know that...and did I not watch your videos with the attention that you deserve? Aldo Germany is a beer country. I live in a country with the best beers...greetings from 🇧🇪 Belgium ...jerrepictures.be

[@SinKillerJ]

Conduit? $20. But I like you, so $30.

[@joevasquez1776]

A or c

[@jarpen3]

Why not buy groowat is all in one more money in pocket,

[@OffGridGarageAustralia]

I like the Victron stuff as it integrates with all devices and also is completely remote controllable. Also, free updates for life. Just like Tesla 😁

[@jarpen3]

@@OffGridGarageAustralia So why don't you buy victron batteries or the Chinese ones are better

[@jdfloats]

Thanks!

[@jdfloats]

Hi Andy Love what you are doing i am making a batttery rack and a sytem like you . watching you makes my day. Thank you .