alexam3001

Hello all , there is any 485 protocol for Deye BMS available ? I have extracted some date from protocol, but not all of them. Also I have some problems with checksum algo. Regards, Allex

from bms protcol pesrpective inverter is asking this discharge current: Lib : 0x0073 2 Discharge current limit 0.1A from log : ['0x2', '0x3', '0x0', '0x73', '0x0', '0x1', '0x75', '0xe2' - inverter requesr '0x2', '0x3', '0x0', '0x1', '0x5', '0xdc', '0x16', '0xf0'] - bms response Soltaro protocol ============== ID 0x1872. 2:1 has maximum charge voltage 4:3 has minimum battery voltage during discharge (may not act on this value as yet) 6:5 is max charge current, tenths of an amp, total for all packs (similarly for Pylontech, LIB, or LIC) 8:7 is max discharge current, tenths of an amp, total for all packs (similarly for Pylontech, LIB, or LIC) Send this message continuously for BMS to maintain "connected" status. but inverter is not reacting to max discharge current value. i tested with this 2 protocols and no reaction. with my software i can basically emulate almost any type of bms /protocol.

Hello, From more then 3 month I'm fighting with Voltronic/Axpert inverter to set the discharge battery current. I tryed with LiB bms protocol, Soltaro protocol. The value are not used by inverter. They are ignored so in case of low SOC the new discharge value are not takein in conssideration. Also serial command PBATMAXDISC is not supported. Do you have any idea if there is any way to setup this value dynamically? Inverter firmware is : 76.05 Thank you Alex.

please check this site. https://www.victronenergy.com/live/battery_compatibility:pylontech_phantom#:~:text=The Pylontech battery requests a charge voltage of 53.2V. and also : https://en.wikipedia.org/wiki/Lithium_iron_phosphate_battery

If this battery are new then try to charge them in parallel (5 days ...) with a modern power supply and limit the voltege to 3.45V. This will do a slow charge but all the battery will have the same SOC. Connect them in revers corner e.g + on left and - on right and after 2 days connect in oposite corrner. Depend on the bms, the balancer can be a resitive one with mA or with active balancer A(1~4A). But this is not true !!!! The active works perfet aafter 99% of SOC, and because LifePo4 is linear aprox linera the active balancer is doing a small job. and 4A can not be reatch with 10mA voltage deviation. Concusion: fist try to charge in parallel to get the same SOC and the the balancer will do the job. I have 2x 5kW pack and for both i did the same, parallel charging. On normla oprtation the SOC is form 95% to 20% ~3.4V (for 95% and 3.1V for 20%).