As an example, I will configure ETP4860-B1A2 (SMU11B) with a 50A Lifepo4 battery.
The battery was from Tewaycell, so there is no communication, so that the BMS does not turn off when the battery is fully charged and the electricity does not go out, in the BMS settings I increase the “sleep delay” from several days to the maximum possible, it turned out to be about 40+ days.
In older SMU11B firmware, fast charging is called Equalized Charge, but the settings are the same.
The default username and password are admin Chengeme, you will be asked to change it when connecting.
The IP address is static 192.168.0.10, it can be changed in the System Settings – Network Config menu.
The web interface only works via https, there is no redirection from http.
Let’s disable other users who have the password “Changeme”, engineer has the rights to change the parameters of the battery and rectifier, so you can’t leave it with the standard password or enabled:
Maintance – User Management – Lock operator & engineer
It is worth noting that if you change the battery model or manufacturer in the System Settings – Setup Parameter menu, all battery parameters will be reset to standard ones.
Let’s configure the battery parameters.
Monitoring – Digital Power – Battery Group – Running Parameter – Basic Parameters:
Battery 1 Connected: Yes
Single-String Rated Capacity: 85
Float Charge Voltage: 53.8
Equalized Charge Voltage: 54.8
Charge Current Limit Coefficient: 0.25
Enable Intelligent Hibernation: Disable
Since the coefficient cannot be increased more than 0.25, I changed the battery capacity, 0.25 * 85A = 21.25 A battery charging current, in ETP4860-B1A2 standard fuses are set to 50A. The floating voltage is set for each battery in its own way, you need to ensure that at 100% charge there is no voltage imbalance between the cells, in my case 53.8 is specified (in fact, + 0.2V is supplied, that is 54V, with such a voltage DIFF between the cells does not exceed 0.1V at 100% battery charge, you can even specify below 54V). The fact is that when there is no communication between the battery and ETP4860, fast charging does not always turn on correctly (depending on the SMU11B firmware), so I did not specify the floating voltage below 54V, since at low voltage the charging current will be lower than it should. If fast charging works without problems, then you can specify a lower floating voltage, and for fast charging even higher, for example, as indicated in the documentation for the battery. I made an SNMP template in Zabbix for SMU11B and tracked when fast charging turns on and off for 5 ETP4860 with different firmware and what charging current is supplied, this allowed me to more correctly specify the voltage for each device.
Be sure to set up a shutdown when the battery charge is low, at 48V it is enough (usually the voltage drops quickly after that, and at a very low level the BMS may turn off, after which you will have to manually turn it on with a button).
Monitoring – Digital Power – Battery Group – Running Parameter – BLVD Parameters:
BLVD General Disconnect: Enable
BLVD Disconnect Mode: Voltage Mode
BLVD Disconnect Voltage: 48.0
BLVD Connection Voltage: 51.5 (default)
BLVD Delay Time: 30 (60s default)
Monitoring – Digital Power – Battery Group – Running Parameter – Charge Parameters:
Enable Automatic Equalized Charge: Enable
Float to Equalized Charge Current Coefficient: 0.05
Float to Equalized Charge Confirm Duration: 5 min
Float to Equalized Charge Capacity: 70 (70% default)
Enable Timed Equalized Charge: Disable
Equalized to Float Charge Current Coefficient: 0.01
Equalized to Float Charge Confirm Duration: 5 min
Equalized Charge Protection Duration: 5 hours
Enable Mains Recovery for Equalized Charge: Enable
AC Power Failure for Equalized Charge Duration: 10 min
Fast Charge Limiting Coefficient: 0.30
Forcible Equalized Charge End Condition: End@AutoSwhToFlotChg
We will indicate when the battery was installed so that you know how long it lasted.
Monitoring – Digital Power – Battery Group – Running Parameter – Other Parameters
Battery Install Time: 2024-11-29
Delivery Time: 2024-11-01
Battery Production Date: 2024-11-01
In the standard and short test settings, you can also specify Test End Voltage 48V, in case you run the test, the battery is not discharged to 0 and the BMS is not turned off.
Monitoring – Digital Power – DC Output Distribution – Running Parameter:
DC Overvoltage Threshold: 57.0
DC Undervoltage Threshold: 48.0
DC Ultra Overvoltage Alarm Threshold: 58.0
DC Ultra Undervoltage Alarm Threshold: 47.0
In the rectifier settings I specified a maximum of 57V.
Monitoring – Digital Power – Rectifier Group – Running Parameter
Default Output Voltage: 53.5
Output Overvoltage Protection Threshold: 57.0
Monitoring – Mains – Running Parameter:
AC Voltage Mode: Voltage Mode
Rated AC Voltage: 220
AC Mode: 1-Phase
Phase Overvoltage Threshold: 286
Phase Undervoltage Threshold: 176
AC Overfrequency Alarm Threshold: 66
AC Underfrequency Alarm Threshold: 45
System Settings – SNMP- Read Community Name: ixnfo.com
Disabled SSH because the web interface is sufficient, and monitoring is performed via SNMP.
System Settings – Setup Parameter – Enable SSH: Disable
See also my article:
SNMP OID MIB for SMU11B ETP4860