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I added 1 US3000C battery to an existing pack of 2 x US3000 batteries today. Charged up all the batteries to 100% , made the new US3000C the master and all looked good. BMS reported proper discharge/charge rates to my Goodwe 5048ES inverter. BMS communicatoin showed as good. However when discharging the batteries it only discharged the master, even though the BMS reported SOC for the whole pack. At 65% SOC I lost power and it turned out it was because the new US3000C discharged all the way to 2%, the other 2 batteries was still at 100% SOC. Any suggestions on why this is happening or how I could fix it would be greatly appreciated

Awesome, thanks

Cool, will give that a stab. Where do I find battery profiles? I user the PvMaster app and other than selecting battery type ie Pylon 2xUS3000 it does not really give me anything more to set. If I use self define I can set charge current and stop it from charging that way, but then it seems really upset and wont discharge the battery at all. I would also prefer eco because of the time options I can use, but it all seems to be geared around controlling when it discharges the battery more than when and how it charges. But then again, probably just me missing something here

Awesome, thanks for the advice. Will go log a ticket for that. Quite possibly I got the profiles wrong yes. I am back to general, and both of them charge only from PV, but I would like to have PV feed to the grid in the mornings and only then start charging the batteries. The issue is the PV by itself charges the batteries to 100% by around 9 - 10 am. So then they sit at SOC100% until around 17:00 before they discharge again, which is not great of the lifetime of my batteries. If I could get it to hit 100% SOC by 15:00 of there about then they batteries only sit at 100% for an hour or so which should make them last a bit longer. Or that is my thinking at least

Hey guys. Any new functionality in the new firmware or just bug fixes? I have been looking for a way to delay the charge of my batteries similar to the Axpert prioritize feeding to the grid mode but have not had any luck telling my 5048D ES to not charge batteries. Even in economical mode it will still use PV power to charge up the batteries, just not grid. Really looking to not have my batteries sit as 100% SOC all day, as they charge in about an hour , I would prefer to have them start charging about mid day. Also not got the OTA update yet, wonder if 151508 might not support OTA updates maybe? @Jakesza what firmware were you on before?

Thank you. All the earths were connected together put as you pointed out the DP Main switch broke the bond. So I ended up connecting the N-E on the DB board on my side before the RCD, and no negative effects, and I don't have a floating voltage anymore when I switch off the grid. So when the next round of load-shedding starts I will see if it made any difference. I also removed all the surge protector plugs in the house, hoping the surge protector on the incoming feed before the RCD would do the same thing without tripping issues associated with them

So got feedback from the Inverter guys, they were really quick which I am quite impressed by. What they did say is I should have a Neutral-Earth bridge on my side, and that will solve the floating voltage issue. So, looking at the diagram they send me , it looks like all I have to do is bridge the Netrual and Earth bars before the RCD, so will do that and see if that solves my tripping issue. Not sure why the installers didnt do that, as apparently it is already required for generators and is likely to be required in future anyway

That would be 1st prize for me, but the settings for it on the app consist of basically 15 odd settings, most of it around voltage limits on the battery and W feedback to the grid, so am really hoping there is a hidden super user menu or something somewhere

The 1st one is before the RCD as it is on the live on its way to the inverter. The 2nd one is on the way back, back but also before the RCD so my assumption would be while its a complete waste, as both of them is before the RCD they should not really cause any hassles as far as the tripping is concerned? Our estate really does have a ton of requirements which IMHO is complete overkill, but that is not a battle I will win or can even fight

The GoodWe is nowhere near the same league as Victron so I suspect that is something they skimped on... Either way I have send the question trough and hope to get some sort of feedback from them on that one

On last question. So when the inverter was installed 2 SPDs was installed in the DB on the live wire both before and after the inverter. With surge-protector plugs being a general suspect for all these things, would it be worth removing all of them on the pugs in the house now. Am I right in saying with the SPDs in the DB they don't add any extra protection and in fact can now cause more trouble than they are worth?

Thanks Nigel. I think you are correct around the inverter. Some more testing showed the inverter on, but grid disconnected ~20V between N and E. As I power on the loads one by one it gradually grows to ~40V. At any time if I reconnect the grid it goes back to 0V immediately. Will drop the supplier an email and see if I can get more info from them

My next test when the wife is done using power is to disconnect the inverter and check if it still happens. What concerns me is this is an issue I had before I had the inverter installed, so would be nice to rule in/out the inverter. Is it just me, or is it weird that it ends up being 1/4 of the voltage, would assume some sort of transformer would be involved in causing this then?

Report post Posted 17 minutes ago Well, as this initiates the tripping, I wouldn't waste an opportunity rule things out systematically. If load-shedding knackered the first fridge, it could make another one faulty as well. Good point, will try that then

Ah ok, thanks. So on my Multimeter I get I get 0 between all Netural and earth, Main incoming/To Inveter, from Invete. Disconnecting from the grid changes that to 60V between all of the N and Earth I am using a GoodWe ES 5038D inverter

nope, dont have such a good meter, but it might be a good excuse to get one

I can just completely plug it out, seeing as you have load shedding so often lately My expectation was that the inverter would take over the load when the grid goes down so nothing strange should happen as it takes over the load? but that is just a layman's understanding Also the fridge has been changed as the old one dies during the previous round of loadshedding, but the tripping issue has outlasted it sadly 😕

Cool, let me test those 1st and see. I was having this problem before I had the Inveter installed which is why I didn't immediately think it would be the problem, but I do think it could make the problem worse still? If I do get a difference in voltage, what does that point too? Bad Inverter, or look for something connected in the house causing issues?

Ah, Thanks a lot for pointing that out, would have made a fool of myself trying to find one lol. Best the local electricians has been able to recommend was to try a Merlin Gerin RCD as the ones I have might be too sensitive if I have a lot of electronic load in the house. They tested the earth again today and everything checks out fine, checked the resistance on earth all the way into the street supply cabinet and that also checks out. So at this point I cant think of anything else to try. Kinda hoping the builders put in a cheap RCD and me replacing it with the same brand/model didnt make any difference and maybe a better switch might work. All that being said, I would love to really be able to analyze and really get to the bottom of the problem than just spending $$$ on the symptoms and hoping for the best

Hi, thanks a lot for the reply Yes, as the grid de-energizes. If I disconnect from the grid, before they de-energize it then it remains on No, only single phase To be honest I am not sure how to tell when earthing system is in place, but I do think it is TN-S as I have separate conductors for L, N, and E but could be wrong here Yep, I wish I could see the data too, as tripping when it powers on makes sense to me, but when it powers down just boggles my mind I found some mention or surge arrestors before but I have had this happen when pretty much everything in the house was powered off. Except the Fridge and 1 light and it still happened. And it has been doing it before they even had surge arrestors at all I do have 2 surge arrestors in the DB now as part of the Inveter install, one before and after the supply to the invertor, which are both before the SPD. Not sure if it would be worth moving them onto the SPD itself I was also thinking of adding a RCD on the supply from the grid, the idea being that if I could get it to trip instead of the DB, at least the inverter would keep the important bits powered, so I would have something like this: Grid -> 2P Breaker -> #RCD -> House Main Breaker -> Breaker to Invertor -> Invertor -> Breaker from Invertor -> *RCD -> Load * Is the one that currently trips, was tripping even before the inverter installation # New one I am thinking of adding With House main breaker having the non-inverter loads such as the stove on it which is never on when we have loadshedding anyway. Was also thinking maybe a less sensitive RCD could possibly also help?

Hi Guys For years I have had trouble with my RCD tripping when grid lower is turned off. This happens when the power is turned off and not when. It is restored. It also only happen if it is turned off on the grid, I have a breakout box with a 2 pole isolator before the main db board which houses the main breaker and RCD. Can turn the power of as many times as I like there and no problems. But every other time from the grid it trips. I recently installed an Inverter and it still trips when. The grid goes down. However switching of in the breakout box just before loadshedding and no tripping I have had the earthling on the installation tested as that seems to be the 1st port of call and it all comes back good. And from my limited troubleshooting if removing the grid removes the problem it is unlikely to be on my side? Also because it happens before power is restored and even when the inverter should keep everything running I can't see how it can be in rush current? Any ideas on what it could be or how I can fix it would be greatly appreciatetd