Nice ! Plenty storage there.2 no Mason horizontal v3 linked to 2 6kw goodwe invertors
I noticed on the Seplos site, the bms board I have is type B but no instructions for it. ??
Nice ! Plenty storage there.2 no Mason horizontal v3 linked to 2 6kw goodwe invertors
Type B is just the board formatNice ! Plenty storage there.
I noticed on the Seplos site, the bms board I have is type B but no instructions for it. ??
No problem at all Neil, hopefully it's correct ?Great would you mind me using the pictures of your completed bms ?
Hi, did you manage to work out how to connect your inverter to the seplos? I'm in the same situation.RE: MPP Solar/ Voltronic / Axpert King Inverter cable to -> Selpos 48V 200A BMS RS485
Sorry in advance but im stuck - I looked at the manual, but no matter what pins I try the inverter always fails with warning 61 (cant communicate with battery)
Steps taken: Set single battery pack DIP adress switches so 1 is set to 'ON' > Set inverter under option 5 to Pylon and confirm. Reboot Battery and then reboot inverter. Nothing - after 3 mins beeping error 61 to say no comms with battery.
Method : I have a RJ45 network cable I cut the end off and connected a special Rj45 cable with screw pins so I can easily change the wires around for pin out testing. I tested the pins once connected with multimeter to make sure pin out is as expected.
However ....
Page 31 of the Selpos Manual shows:
View attachment 103536
Does this mean 1/2 OR 8/7 pin pairs can be used? ( I have tried these both)
But then also in another Selpos Manual I can see:
I think RM485 is used for battery to battery comms is that right?
View attachment 103537
At the inverter end...
Axpert King / MMP Solar /
Reading online seems to show pins 5 and 4 are RS485A/B
View attachment 103538
So I tried the following:
Inverter 5/4 > 2/1 BMS
5/4 > 7/8 BMS
5/4/6 > 2/1/3 BMS
5/4/6 > 7/8/6 BMS
I then reboot all and set option 5 for battery in inverter to Pylontech - but all result in error 61 - no battery comms.
Also tried 4/5 , and BMS 1/2 , 8/7 (back to front) All get error code 61
Any ideas?
The saga continues. The daughter PCB turned up and as I suspected won't connect to either the inverter or the PC. Furthermore the BMS is not switching on properly so there is not any Voltage across the P+ and P- pins (hence can't switch the invertor on)To update again I installed the board minus the connector daughter PCB. The firmware installed is missing all the protocols except Pylontech which worries me somewhat as I was hoping not to risk another FW upgrade. Won't do anything until I have received the daughter PCB.
Did you fit the cable between B+ and the battery?The saga continues. The daughter PCB turned up and as I suspected won't connect to either the inverter or the PC. Furthermore the BMS is not switching on properly so there is not any Voltage across the P+ and P- pins (hence can't switch the invertor on)
Think it is a FW problem again given my comment above. Back to Fogstar again. Getting rather annoyed by this.
Other option is to send the original BMS to Seplos to reflash with the latest FW, will also do this but will then have to wait out Chinese NY etc.
Minimum is .8 amps , official doc say 1 amp, but that was what my testing showedHello, I have a Seplos 10E which I’ve so far only connected to a Sofar inverter to charge at night and discharge during the day.
I’ve recently added two solar panels and a Victron solar charge controller by introducing two busbars between the battery and the inverter.
The solar production rarely exceeds the demand of the inverter, but when that does happen I expect to see current flowing into the battery. However, when the difference between the solar current and the inverter current is small, the bms current shows 0A. Is there a minimum current that the bms needs to ‘detect’ before it allows the charge or is it simply not showing it even if it’s there?
So where does the missing current go?Minimum is .8 amps , official doc say 1 amp, but that was what my testing showed
Still flows, but too small to be registered by the shuntSo where does the missing current go?
Ah ok; it still does detect small currents in the other direction thoughStill flows, but too small to be registered by the shunt
in order to detect this , you will need to do a full charge , until cutoff, and a full discharge until cutoff.I’m asking quite a lot of questions at the moment so apologies for that. View attachment 198738
My battery capacity is only showing as 200.00 Ah. Should this not be higher? I thought it would be 280. Also thought the BMS would auto detect this.
Battery has only been charged a couple of times so far so wondered if it takes a few days to adjust the capacity or if it should do it straight away.
It’s the Seplos Mason with BMS 2.0