Weco 4K4LT - 4 K4 LT Technical Specifications

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WeCo Srl Italy www.wecobatteries.com 4K4LT V1.00 24/01/2023
4K4 LT
Low voltage
Rated DC voltage at 25°C
51.2Vdc
Useful Ah
86Ah
Nominal capacity in kWh
4.4 kWh
Maximum charging current
110 Adc
Suggested charge/discharge current
65 Adc
DC voltage range (Mosfet Int.)
From 47.5 to 58.4
(Do not use as settings)
Maximum operational efficiency
97%
Usage temperature (STC)
25°C
Operating temperature of the BMS
–20° to 65°C
(Temperature range not indicated in the warranty conditions are not covered by warranty)
BMS charging temperature
-5° to 55°C
Self-discharge rate
<1% loss per month
Dimensions
490x580x155mm
Weight
47Kg
WeCo 4K4LT has a special chemical composition lithium iron phosphate.
After the charging period, compared to the maximum voltage reached at 100% SoC, the total voltage can drop to about 53V: this is normal
behavior.
When the battery reaches the maximum voltage or cut-off threshold (SorC 100%) do not continue charging the battery.
In case of overvoltage of a single cell, the relay will open the circuit and the inverter will shut down if powered only by battery.
Check the correct setting of the inverter and check that the BMS battery information is readable by the inverter.
Failure to communicate between the inverter and the battery could cause serious damage to the battery.
4K4LT cannot be used in OPEN LOOP.
If the inverter is switched off, press the RUN button on the battery and turn off the battery as described in section 6.2.2 of this manual.
The BMS will perform a self-restart 4 times every 15 minutes for a 24-hour period and after the 24-hour period, the BMS will perform an auto-
restart every 12 hours for a period of 4 days.
In case the current or voltage limit has been exceeded 4 times consecutively, the operator must wait 30 minutes before pressing the start
button again.