DeeJay

Hey guys, I am trying to get info on how to BMS connect 4850's revision 14 to 48100's revision 14 so that they can talk to a Sunsynk 16kW inverter. The 4850's have 4 pin dip switch with 1x RS232 and 1xRS485 and the 48100's have a 6 pin dip switch with 2x RS485's and 1x RS232. So I am not sure if this is even possible?? Please could someone help? I have emailed Clarke Zhong, Shoto's sub Saharan representative this morning to request info... Many thanks

Hi guys, I have an old axpert SMD Lynx 5000-48 from a few years back which I decided to install as my home inverter. I ordered the ICC module and USB to RS232 adapter to let the inverter talk to my Pylontech 3.5 lithium battery. I connected the USB side of the adapter to the powered up raspberry pi and the RS232 end to the inverters RS232 port... ...pop and smoke... I only saw afterwards that next to the RS232 port is a USB port which I am guessing is where I was meant to plug the pi in?! I have obviously fried this comms pcb now and will need a replacement. Does anyone know where I might find one? Thanx a lot guys

Hi there Hoohloc, Thank you for the reply. Sorry, the inverter is a Kodak VMiii model, and it is set to Pylon on the battery setting. This lets the inverter communicate directly with the BMS on the batteries.

Hi guys, Just wondering if anyone come across a similar issue and how they fixed it. Have searched the forums, but could find nothing to answer my question. I have just purchased two US3000C's for a client and swapped out the deep cycle batteries that were installed a year back. I am a registered electrician and have been installing solar for a little over a year now, and inverter backup systems for around 5 years. I originally had an error 69 charging error with the US2000B's, but sorted this out by lowering the bulk and float charging values that came out the box with the ICC equipment. I now installed the US3000C's and came across the same warning 69 issue. I am aware that this is the batteries' BMS telling the inverter to stop charging, as the batteries are already fully charged. I have set the bulk and float values all the way down to 51v but am still getting this error. Does anyone know the correct values to input here so that the inverter does not go into a constant warning 69 loop when the batteries are fully charged? Many thanks

Hi there. I came across this problem last week when trying to install new US3000C batteries. I know you asked this a little while ago, but hopefully this helps you... I asked around and tried to get a definitive answer to this. No one could help. I kept getting given the incorrect cable pin outs. Eventually I used a bit of logic with the manual and what I could find on the net, and figured it out. I made up my own cable and it worked perfectly. here's the pinouts for the new US3000C model. Battery Pin 8 to Inverter Pin 3 ; Battery Pin 7 to Inverter Pin 5 Good luck Let me know if this helps you?

@Coulomb Heres a screenshot of what it looks like today. Rainy miserable weather...

On ICC I've got bulk charging set to 56.4v and Float at 54.0v

Which settings @Bloubul7? Do you mean the low voltage cutoff? Set to 42v Back to Grid is at 44v. Does this need to be lowered?

@Coulomb Thanx for the reply. I also thought that this is what was supposed to happen...BMV reports to ICC and then pushes this data to the King so that it can work on those readings instead of is own battery voltage readings. @Bloubul7 I have set the cutoff voltage all the way down to 42v to try and get it out of the way, but it doesn't seem to help. I have set up the BMV based on the 102Ah rating, and waited until the batteries were fully charged before inputting this data and commissioning the BMV, so I believe the BMV is reading SOC correctly. @Sidewinder Voltage was at 45v when the shutdown occurred...

Hi guys, I have a client that insisted on working with deep cycle batteries instead of lithium. I installed a 5kW King and solar panels on his roof. We installed the 4x 102Ah deep cycles and connected them up to the inverter. In order to monitor the installation remotely, I installed the ICC hardware as well. So, once installed, we ran a test, and performed a shutdown in the evening (no solar). The batteries lasted 1h15min with an average of 500w load. Now, my calculations show that 48v @ 102Ah would give you roughly 4900w of usable power. Lets assume the inverter caps that low end of the batteries at 50%, then we should still get 2450w of usable power, which, at 500w/h should equate to roughly 4-5h of autonomy. Well, 1h15min is nowhere close, so I purchased a Victron BMV-700 to show exact state of charge of the battery bank. I calibrated it correctly and it showed 100%. We reran the test and still, it shut down after 1h15min, even though the BMV showed 78% remaining. This leads me to believe that either one of the batteries is faulty, causing the battery bank to fail, OR the BMV is not sending its data to the inverter properly, thus the inverter is still controlling the shutdown based on the voltage across terminals (very inefficient), OR the BMV is not wired into the install correctly (why would it then show the correct SOC and draw while on batteries?). I have wired the BMV up exactly as it shows in the manual. It's not rocket science. It seems to me that the inverter is not getting the info from the ICC module. I have spoken to the guys at Centurion Solar, who manufacture the ICC hardware, but we have not been able to find a solution. Is it possible to connect the BMV-700 directly to the King so that it can see SOC correctly? If not, then what exactly is the point of the BMV? Just for me to see whats happening? At the end of the day I need the inverter to monitor the batteries based on the BMV's SOC. Has someone done this before, and if so, how do I set this up? Many thanks

OK, so this morning I have the following to report... Last night the inverter ran perfectly, as mentioned above. Even though it was set to only charge via solar, I see that the grid was trickle charging the battery from 21% at a rate of 2 amps, until 7am when the solar woke up and took over charging. At this point the batteries had recovered to 40%. Solar charged the batteries back up to 52v, 99% by 11am. The restart I mentioned above did change the values visually on the inverter settings page, but these values were not sent to the inverter. It stopped charging at 52v, the settings I set on it before the restart occurred. All seems to be running perfectly 🙏

Thanx guys for the help over the last few days. I wish I had actually taken in what was being offered as a solution and tried it... Everything is working perfectly. The battery drained to around 48.4v, which was equivalent to 21%. Didn't want to risk the batteries switching off and have to go back again tomorrow to turn them on. Batteries are charging back up now. I did notice that the Pi reboot itself once tonight. When it did, the bulk and float voltages reset to 53.2 in the inverter settings tab. I did not click set. I will see if this value is just a default or if it changes the value back. I'll know in the morning. None of the other values seem to have changed...

@Calvin Do you think there is any need for a BMV on this system? Does the King & Pylon BMS communicate okay?

😵 What a plonker! My bad! U did indeed! Somehow I read it but did not implement it! Had so many hassles with this install. It's all a bit of a blur! As u guys both mentioned, solved the problem straight away! 🤭

@SnoopySniper You asked me which settings were incorrect. As per my post above, the bulk and float charging voltages in my case were too high. If the battery cable is connected between the King/VMiii and the Pylon, and battery type in setting 5 is set as PYL, and on the LCD display you are seeing a flashing battery, it indicates that the BMS is talking to the inverter. Right. Now, I am no expert, but if, in this state, the LCD screen is coming up with a warning 69, it is because the BMS, which is in place to, among other things, protect the battery, is telling the inverter to stop sending charge as the battery is already fully charged and possible damage will occur if more charge is forced into the battery. Now thats fine. All you do is lower the bulk and float charge, and hey presto, BMS and battery are happy. All for the cost of 2% battery power. I would guess it can be notched up slightly from 52v until the error comes back, and then dial it back by a 0.1v adjustment to get it at its max. To be honest, I'm happy at 98%! For all those that have Pylon batteries installed with no BMS monitoring the battery, and they have the bulk and float charge set as high as 53.2v, in my humble opinion, this will be doing damage to the battery. I have no idea how much damage, but if the BMS is stopping charge at that voltage, then I'm assuming it's not a good thing... I hope this helps? ✌️