BMS communication issues

Tinbum
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Re: BMS communication issues

#11

Post by Tinbum »

Joeboy wrote: Thu Mar 17, 2022 9:55 pm OP suggest you show cable
All ready requested that in post 7. :D :D
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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Joeboy
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Re: BMS communication issues

#12

Post by Joeboy »

Sorry Tinbum missed that! :oops: He needs to get the pin outs of the inverter, the battery us3000. Then pin outs of the us2000 battery, compare and have a comms lead built. I hope its that simple.
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Tinbum
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Re: BMS communication issues

#13

Post by Tinbum »

Joeboy wrote: Fri Mar 18, 2022 6:37 am Sorry Tinbum missed that! :oops: He needs to get the pin outs of the inverter, the battery us3000. Then pin outs of the us2000 battery, compare and have a comms lead built. I hope its that simple.
I was pretty certain that is the problem.
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
Tinbum
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Re: BMS communication issues

#14

Post by Tinbum »

I wonder how he got on? :roll:
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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Joeboy
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Re: BMS communication issues

#15

Post by Joeboy »

Ye can lead a horse to water but cannae make it splice a comms lead. :D

Hopefully he'll be back with an update.
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
Tinbum
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Joined: Mon May 31, 2021 9:55 pm

Re: BMS communication issues

#16

Post by Tinbum »

I must say though I've not been getting any notifications for a while for some reason. (by e mail)
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
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Joeboy
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Re: BMS communication issues

#17

Post by Joeboy »

Tinbum wrote: Tue Mar 22, 2022 1:55 pm I must say though I've not been getting any notifications for a while for some reason. (by e mail)
I don't have that function at all!
19.7kW PV SE, VI, HM, EN & DW
Ripple 7kW WT & Gen to date 19MWh
42kWh LFPO4 storage
95kWh Heater storage
12kWh 210ltr HWT.
73kWh HI5
Deep insulation, air leak ct'd home
Zoned GCH & Hive 2
WBSx2
Low energy bulbs
Veg patches & fruit trees
Tinbum
Posts: 1112
Joined: Mon May 31, 2021 9:55 pm

Re: BMS communication issues

#18

Post by Tinbum »

Image
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
Tinbum
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Joined: Mon May 31, 2021 9:55 pm

Re: BMS communication issues

#19

Post by Tinbum »

E mail alerts started working again last night!!
85no 58mm solar thermal tubes, 28.5Kw PV, 3x Sunny Island 5048, 2795 Ah (135kWh) (c20) Rolls batteries 48v, 8kWh Growatt storage, 22 x US3000C Pylontech, Sofar ME3000's, Brosley wood burner and 250lt DHW
cojmh
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Location: West Midlands

Re: BMS communication issues

#20

Post by cojmh »

Hi,

Apologies for the long silence, I have been away from the computer and unable to check.

I have through the cables supplied by Solax and the cable supplied by Pylontech.

Basically The solax cable:

Inverter end -> Battery end
1 -> 4
2 -> 5

All other connections are open circuit

In terms of the Pylontech cable:

Inverter end -> Battery End

1 -> Not connected
2 -> Not connected
3 -> Not connected
4 -> Not connected
5 -> 5
6 -> 6
7 -> 7
8 -> 8

So I can already see an issue The solax inverter is clearly expecting comms on pin 1 and 2 whilst the pylontech battery is expecting comms on a couple of the following cables 5,6,7,8.

there is a complete mismatch ....

So I am going to work out the pins from the manuals (I hope) and come back to you.

I did take photos of the cables but it was not easy to see what was connected to what so I tested with a multimeter

Thanks for all of your helps so far and I am sorry for the long delay.

Jon
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