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Using washers is NOT an issue if they are NOT in the main current path (e.g. when torquing the cable lug from above with a nut / bolt), and where the tinned copper cable lug is in direct contact with copper posts / tin-or-nickel plated aluminum posts. Make sure to clean the posts especially if...

Guys ... Let's refrain from lighting matches in a room full of gasoline vapors ... Nothing good will come out from adding insult to injury. I share your feelings, my patience was also tested greatly, but he won't learn to work in a constructive manner if we make fun of him or stuff like that.

Well that's not what the scientific community says. But if you listen to the oil lobby, then of course they will tell you it's a scam. About nuclear plants ... Like really ??? Besides the issue of storing the nuclear waste (well Finland found a way to deal with that), aren't you forgetting that...

AWG 8 is quite small. I'm used to work in metric, NOT in imperial. For this kind of sizing, I usually refer to the great Legrand Power Book 04 - Sizing conductors and selecting protection devices (it's quite old from 2009)...

Here Yesterday: https://diysolarforum.com/threads/diy-chargenectifier.56329/post-976116 And Here although it was another thread (and the 120VAC power was only in the chart): https://diysolarforum.com/threads/looking-for-48v-battery-charger.61308/post-972735 Anyways, better twice said than not...

Well ... I also originally had a look at UKSA007 solution. "It's expensive, can you just share the code &schematic and let DIYers do it themselves?" -> NO "I'd like to have a Digital Output to trigger a forced disconnection / reconnection using a contactor. Can you implement that ?" -> NO So...

Isolation, BMS with 80 channels (!), Availability of Breakers, etc ? Not sure what's actual nowadays, but when I worked on an industrial battery I think off-the-shelf BMS solution was like 16s-32s. Then of course nothing prevents you from building 1 battery module of 16s-32s and put it in...

Maybe mine is more industrial-like. Basically you also need a precharge circuit with resistors (plus fuses, switch / push button, optional contactor). Otherwise what might happen (unless your inverter precharge first or you habe a smaller charger in parallel always connected to ensure a...

Sauvage 😜 Just received it ... Still need to see how to do it exactly, I guess small polycarbonate or similar mounting plate. EDIT 1: Real Picture with the PVBrain2 Board ... I hate it when the smaller size is just a slight bit too small, then the next size is like 50% Oversized. That's how...

Same problem here. I end up buying stuff I don't need for projects I only start (and not finish)...

The hole of the fuse terminal seems also quite big compared to the stud though. There seems a lot of surface inside the hole of the busbar/fuse that you just installed that is NOT used around (or under) the stud. This means that the electrical connection will maybe only use 10% of the rated...

Yeah you also need to remove the DC- connection to Earth/PE/chassis (I guess that's what you meant by "Isolate the PCB"). Or actually connect to Earth/PE/Chassis at the middle point. I'd say a totally floating system is not a very good idea. But I believe what @mlhagema was talking about was...

In a few words I'd say ... PREVENTION instead of PROTECTION ;). Let cells time to balance out. Avoid OVP and UVP as much as possible. I used to think it wasn't necessary ,.. until one battery started getting more and more unbalanced and I hit OVP all the time, 5 disconnections an hour each day...

Around 70-80% of Rated Power according to their Datasheet (and which Version of the Datasheet you are looking at IMHO) for 120VAC nominal. But then if it's more like 120VAC - 10% due to grid/voltage drop/etc it's going to be rather 60-65% of Rated Power ...

That's why I say to use extended units to everybody ?. 38*120 = 4560... That's higher than the 3000w rating so it cannot be. Could be 56VDC or 52VDC etc that we can debate ?.

Could be, sorry for spoiling the thread 🥴

Fair enough, you're not planning an HVDC station yet ? But also at 600V it's not only a matter of "normal" insulation. Plastic insulation / "thickness-wise" is OK, but you must also factor in your clearance, creepage, impulse voltage, etc. Also 96V (DC !) is quite a lot for many DC MCBs...

Don't you have this in your config file ? logger: hardware_uart: USB_SERIAL_JTAG # level: DEBUG # For Debugging only level: INFO # For Production Make sure level is NOT set to DEBUG !

Same feeling here ... Would be better to have an "all-in-one" software or at least a "all-in-one" framework going forward. But it is what it is. I can also understand people doing their own spinoffs. Their use case is quite specific, integration is different, they might not be able to wait, etc...

Well if you want to take it up a notch we can talk about 5MW+ Turbine Generators and Transformers. I'm not saying all manufacturers do it, but in my field we are around 690VAC on the grid (LV of Transformer) and up to 1000VAC on the loaded generator. You get several kA in each converter (and...

Well the trick is either to Precharge the charger output capacitor through a resistor OR ... simply have a breaker (which you would need anyways !) on the output of the charger. 1. Open the breaker on the DC side so charger/battery are isolated from each other 2. Connect charger to 240VAC 3...

@42OhmsPA: by the way, you "expected" to be limited to 25A ... Unless you set the limitation in software, the Limit is going to be determined based on the Voltage Difference and the Cabling/Connection Resistance. Essentially: you need Volts to push Amps ;) . And if your AC 120V Grid or...

Isn't there a "error(S)" or "error bit mask"? The syssi code had it at least. Otherwise errors in the inverter I would guess

Ah Gentoo. Those good and bad old days. I learned a lot on it, but unfortunately had to give up ... Too much maintenance burden and dependency solving (package.mask, package.accept_keywords, ...) for me. Nowadays I'm mostly on Debian for Servers and Ubuntu on Desktops. Even though I hate Ubuntu...

Be a bit wary of Docan. I'm not sure I would go as far as calling them scammers but... Maybe just bad experience on my end but one cell came leaking electrolyte and they were like "it's fine, just use it" 🙄🙄🙄 At least now nkon in Europe has some decent warranty and approx same prices, so that...

No. I'm evil: `root` :ROFLMAO:

Well I don't fully agree with him. BUT, what governments did with these vaccines "are safe no worries etc" ... Then you find out that Pfizer faked their study. Government NOT registering complaints (easy to say that there are less than 0.1% of people having side effects if you REFUSE to...

Well it's technically still low voltage (< 1000VAC/1500VDC) for all standards and purposes. Even ELV (< 120 VDC). But yeah, for Touch Protection ABSOLUTELY WEAR GLOVES. Concerning Arc Flash I partially disagree: 48 VDC in itself is already quite dangerous and should be stated as such. By the...

I think they are designed for redundant / parallel operation. Same as redundant power supplies for servers for instance. You don't want the faulty psu to go into short circuit, rendering the good psu totally useless (and without a fuse in between them) ?.

@MrPablo, @Der_Hannes, @Sleeper85: on a separate note, I'd appreciate if you could update the GitHub page a bit in terms of configuration. Instead of just this Maybe make it a Table since there is quite a bit of configuration that is inverter-specific Brand Model Status Reported by Inverter...

I think the MATH is a bit wrong. Look at the datasheet. At around 80%-100% load you are looking at around 95.5% efficiency. Thus 3000W / 95.5W = 3141W Power factor is >0.99 for 50%-100% load thus your Apparent Power is 3141W / 0.99 = 3173 VA. Cross-check voltage drop across your cables...

Yes, I don't know what's going on "behind the scenes" so I can only reach out to try to explain what would be good as a user :). It does not need to be using my script, this is my barebones approach to solve problems I can face as a user. Because imagine I change 30 different parameters and...

EDIT: yes, the equivalent for "same losses" would have been 10 mOhm vs 10 x (10)^2 mOhms = 1000 mOhms. At least for conduction losses in BMS. For switching losses is more complicated than that (in Inverter), as theoretically it's a linear relationship, but in practice higher voltage MOSFETs are...

And thank you all for your help (y) , in particular @timselectric and @houseofancients

Alright ... Now cansniffer is dumping something. This is promising (FINALLY !) 63|ms | ID | data ... < can0 # l=20 h=100 t=500 slots=6 > 99999 | 351 | 27 02 42 02 08 07 D0 01 '.B..... 99999 | 355 | 33 00 63 00 EC 13 96 05 3.c..... 99999 | 356 | FD 14 ED 01 B6 00 2C 00 ......,. 99999 |...

So, quick update on the situation: I reconfigured the Inverters - Without a PERMANENT BOND - With "Signal ISLAND MODE" ENABLED (CHECKED) - With a Single RCD Now the system seems to work, at least at low load (~ 1-1.5 kW). Didn't measure any diverted Neutral / Earth current since right now the...

Now I'll have to try to backport the Auto Charge Voltage Control as well :ROFLMAO: . EDIT 1: @MrPablo: I probably didn't mention often enough, but THANK YOU (for your help, for the enhancements, for the technical explanations, ...) (y) . EDIT2: Actually it wasn't *that* bad to backport the...

Apples to purple bananas I'd say ... Are you talking about these ? https://community.victronenergy.com/questions/136624/multiplus-ll-burnt-terminal-block.html Basically from https://www.wago.com/global/electrical-interconnections/connection-technology or...

Interesting measurement. Accuracy at such low load I'm not so sure though. I think the main benefit would be potentially increasing the lifetime of the fan. Other than that... Nah. For electromechanical contactor I think you are a bit optimistic: - you have a constant power loss to energize...

As for me I need to start setting up the PVBrain2 Board with these Adapters (RS485 to UART) since I have relatively long Cabling Distances and I will use the JK BMS RS485 Converter as well: Need to figure out exactly where to solder the Pins though (2 Options on the left, 2 Options on the...

Agree. In many cases it might not be an issue. CAN is operating at 24V I think... System voltage is 60VDC assuming it's not too close to 230VAC... So the likely hood is fairly small to have a fault I'd say. Not some industrial application with CAN on a 1000v battery or igbt inverter for instance...

Not sure if it can help you, but you mentioned before you had almost ZERO resistance between POS and NEG. Warning: always perform resistance/continuity tests with a fully de-energized & disconnected inverter (PV, Battery, AC) !!! When you do that kind of test, always make sure you test POS to...

A bit more detailed than in the original post, but ... I used to think it wasn't necessary ,.. until one battery started getting more and more unbalanced and I hit OVP all the time, 5 disconnections an hour each day, etc. Long term that can damage BMS ... So it's better if inverter reduces load...

That's what I thought as well, but he just calmly made his point (hopefully) without re-heating the discussion :).

That's also what I'm observing. Yeah also the discharge current/power of the JK BMS during the night made me believe I had like 400W no-load losses. For the new Batteries I'm planning to add a Victron Smartshunt (and an extra NEEY Smart Balancer 4A). But for the existing batteries. Retrofit...

Old thread but I'll throw in my 0.05$. The FIRST thing you need to determine is which fuse tripping characteristic you are going to use: - aR: semiconductor fuse, ultra fast, short-circuit protection ONLY (NO overload protection !), HIGH power dissipation - gS: semiconductor fuse, very fast...

This is an overview of my schematic if interested I'm still not 100% sure if I will use the contactor+switch variant or just the switch variant. With a 4 pole switch disconnector i can always change by moving the output cable from one set of poles to the other. Precharge network both on...

While it wouldn't cover the case where there is a temporary power failure (NOT a wanted trip) but actually it's not a bad idea, thanks for the tip (y) .

It's just variable speed as far as I know. Even at 10-15 degrees and zero load in my garage I'd say it's running at 30% ish speed (guesstimation). So wear should NOT be very high. Full load it's crazy loud. I'd guess it's more load dependent with some offset than temperature dependent. Which...

Make sure you understand the differences between and the different aspects of networking: - Routing - Switching / Bridging - NAT including OUTBOUND NAT - Firewall (Input Rules, Forward Rules, Passthrough Rules, Output Rules, etc) As well as Layer 2 vs Layer 3 stuff. I myself have NOT gotten...