question

micmad avatar image
micmad asked

Victron & Polytech --> Sonnen 2500 LFP2 possible to use without Sonnen System components?

I rescued some Sonnen 2500 LFP2 from disposal.


now i want to use them in my Victron 48V System

but the battery need's spezial comunication to

get and stay alive - Manufacturer is Polytech and ther

Battery's are suportet by Victron - with minor modification

of comunication Sonnen 2500 LFP2 schould work as

well.

can anybody help?



48v battery
1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

matt1309 avatar image matt1309 commented ·
Could you just use a smart shunt rather than having BMS communication, they're pricey but i think otherwise you'll need to write custom driver to get BMS communication to work unless someone else already has.
0 Likes 0 ·
3 Answers
trpkosj avatar image
trpkosj answered ·

Hello,


have you found any solution? I have 3 pieces of LFP2 and want to use them with Victron...


Thanks,

Jirka

2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

micmad avatar image
micmad answered ·

Yes - I found that you can use

BatteryView_us2000b_series_3-0-26 to reset communication timeout

so Battery stays alive - with internal protection


To get lifedata from the Battery --> Wifi and MQTT

https://www.rustimation.eu/index.php/solar-pylontech-akku-ueber-konsole-aufwecken/

no wakeup so far with LFP2500 but rest works so far


best regards

MIC





1 comment
2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Bouke avatar image Bouke commented ·

Hi, do you mean you updated the firmware on the sonnen lfp2 to the pylontech us2000b firmware?

They now stay on and communicate with victron?

That's amazing if it's that easy. I'm scared to brick my battery's though.

0 Likes 0 ·
micmad avatar image
micmad answered ·

Nope - no Firmware update,

just connect via RS232 and open BatteryView_us2000b_series_3-0-26

(Country settings in Windows must be American !!!)

select the correct Com Port - start to Scan

then go to Options --> Control Pan

Click in the Set Row on line 3: Close external comunication timeout

cell turns green --> the Battery stay's alive - just switch on or off with green button

or internal Protection


but no communication with Victron Components thats part 2

Sonnen RS232 --> D1 Mini --> WIFI --> mqtt --> NodeRed --> Batt % to Multiplus


good luck


Michael


2 |3000
Toggle Comment visibility. Current Visibility: Viewable by all users

Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

Related Resources

Additional resources still need to be added for this topic