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Righty. Finally got comms. Turned out my first new lead was faulty ( no continuity on the blue wire ) so that’ll teach me to check my leads even if they’re new. Think everything is running ok now and guessing the software is defaulted to Pylontech as it’s not in the drop down What can I actually...

Excellent. Thank you.

Thanks guys. I’ll check the resources and try and muddle through it. Just amazes me that in this day & age the BMS doesn’t come with any instructions. Even LuxPower are pretty useless when you have a problem. Rant over.

Excellent. Thank you

Hmmmm, just plugged in the pc to make sure everything was hunky dorey and had this warning on screen. Tried searching the resources but haven’t found anything. Any ideas?

Having read this thread, I’m sort of hoping all the gremlins have been resolved with this BMS? Seems like it’s been a bit of a nightmare for some people. I’m being asked by Colin at Seplos if I require a screen ( sounds useful ) and a Bluetooth connection. Why would I need a Bluetooth connection?

Thought I'd check on the system today and noticed that although the battery seems be charging ok from the PV, it's not charging at night (E7) and not really discharging during the evening. Looked back though the inverter history and it seems to have started this weird behaviour a couple of days...

So is the Bluetooth connection there in order to change settings remotely? I’m guessing the screen allows you to do this?

Thank you both. I’ll probably try both individually and see how I go. Another problem ( ? ) I may have stumbled across is according to the LuxPower user manual, the LuxPower doesn’t use a ground in its pin out. Do you think this is correct?

I may have to email LuxPower then as their pin out table doesn’t show any ground. ?

Mariner62, if you mean the admin/admin login, I’ve already tried that and neither Pylontech or LuxPower are on the drop down.

Brum I’m gonna start from scratch with a new, tested lead but your wiring explanation is what I have already tried. Picked up one of those reusable rj plugs so should be a lot easier.

Seems to be in Standby mode too. How do I get out of that?

This is probably a dumbass question, but I think I might be a dumbass. Is there anywhere that gives simple concise instructions on connecting & using the Seplos software? Also, do I need a special lead to connect to a laptop or indeed to my LuxPower inverter?

Is there any reason to have the MC4 DC feed cables from my panels the same length? If for example I had one at 6m and one at 35m ( split roof system ), would this cause any serious issue?

Righty. Finally got comms. Turned out my first new lead was faulty ( no continuity on the blue wire ) so that’ll teach me to check my leads even if they’re new. Think everything is running ok now and guessing the software is defaulted to Pylontech as it’s not in the drop down What can I actually...

Brilliant. Thanks for clearing that up ?

Well I’ve changed the wiring around, tried it on the 485 too and nothing works. Useless piece of chinese rubbish!! May as well leave it on lead acid as it functions fairly well on that. Thanks for trying.

Righty guys, getting nowhere fast. Back onto comms lead making. Looking at the resources, Seplos use CAN-L on pin 4 CAN-H on pin 5 GROUND 3/6 RS485-B on pin 1/8 RS485-A on pin 2/7 GROUND 3 Soooo, my LuxPower tek3600ACS has a RS485/CAN port, do i make a lead using both or just stick to one...

Well, i tried and failed again. Made a CAN lead up and its still the same. I can only get a 'no fault' status on my inverter when i'm running as a lead acid battery. In fact, everything seems to run ok in this setting but i'm aware it isn't right. Also, in the Seplos battery monitor software...

Well it looks like I’ve still got problems with my setup. Battery charges from PV and sometimes from E7 but is exceptionally flakey when it comes to discharging. Luxpower assure me that from the data, the inverter is calling for DC but the BMS just sits there in standby mode most of the time...

Did you ever manage to access the Bluetooth? If I do a scan using my iPhone, it can’t find it.

Turns out it was a frequency issue with the grid. Emailed LuxPower and they tweaked the inverter.

Not exactly as my CAN is on pins 3&4 for my inverter. Works fine when the inverter is set to lead acid; reads the volts and gives a SOC ( although it’s wrong ). As soon as I use the Li-on setting I get a comms error and no comms. Might try the RS485 instead.

I’ve got a LuxPower 3600ACS AC coupled inverter. My latest lead uses, Seplos end: Pin 4 - CAN L Pin 5 - CAN H Inverter end: Pin 3 - CAN L Pin 4 -CAN H This is the latest 200A 16s unit I’m using. You posted earlier about the wires needing reversing and I’ll do this tomorrow ( I use the works...

Hi, found this site whilst searching for a BMS to complete my home battery build. It's made up of 16 x 304aH EVE cells and i'll be running it through a LuxPower 3600ACS inverter. My question is, which is the best version to get, Can or RS485? My inverter appears to support both.

I’ll try and get some pics of the wiring tomorrow ( had a gut full of it today ). The protocol has no setting for LuxPower or Pylontech in my software. It’s been mentioned previously that it defaults to Pylontech but I have no idea on this. The LuxPower pin out drawing shows no ground.