The listing offers 1x 5kWh lithium ion batteries, that have been used for 1 years but not under heavy duties, there is still around 10 years life expectancy.

You have to expect some scratches on the frames but the cells and BMS are working very well. 

YOU ARE BUYING 1X BATTERIES TOTAL 5KWH

Expect some scratches on the frames,  the BMS shows an alarm but it can be cleared or reset . 

The most complete package for homegrown energy, plug-n-play installation, compact size, 5kWh lithium-ion storage, and ready for connection to the off-grid and hybrid inverter

The battery is compatible with the ESS 5.5kW, 10kW, and 15kW systems. It is used for expanding energy storage by 5kWh. The communication and power cables are included in the package for quick and safe expansion.

The same battery works with all the new off-grid inverters at 5kW, 8kW and 11kW since the BMS communicates via the RS485 port of the inverter. 

For discharge current over 160A, a PDU (power distribution unit) is required for safer operation using 1000A-rated copper bus bars. For installations with 8kW and 11kW MAX Solar-Inverters, it is important to utilize the PDU. 

LIST OF OFF-GRID INVERTER - BATTERY MANAGEMENT SYSTEM (BMS) CONSISTENT 

LIST OF HYBRID INVERTERS - BATTERY MANAGEMENT SYSTEM (BMS) CONSISTENT 

A details presentation file is available in the download section.

PARAMETERS

Important Notice: When the battery is connected to Voltacon off-grid inverters, the correct BMS protocol in Menu 5 is LIB and the BMS Communication cable is configured with the following pins