Deye SE-F12-C (Version C, LCD)12.03kWh 51.2V LiFePO4 battery, LCD version

Overview

SE-F12-C is the 12.03kWh model of Deye's SE-F low-voltage range in its LCD version, which shows state of charge and error codes on the front panel. It stores 235Ah at 51.2V and accepts 230A continuous charge and discharge, with 280A peaks for 10 seconds; at nominal voltage that is about 11.8kW of continuous battery power from one pack. Weighing 84kg and measuring 400×559×233mm, it hangs on a wall, stands on the floor or stacks up to six high, and up to 32 packs can share a bank.

• 51.2V LiFePO4 packs of 5.12, 12.03 or 16kWh
• Up to 32 packs in parallel, 64 with CAN-Bridge
• Wall, floor or stack mounting, IP21 for indoor rooms
• CAN 2.0 and RS485 link to the inverter
• At least 6000 cycles to 70% end of life
• Version C has an LCD for SOC and fault codes

How it works

The SE-F packs are low-voltage batteries built on lithium iron phosphate cells with a nominal 51.2V and an operating window of 44.8–57.6V. A built-in BMS measures cell voltage, current and temperature, balances the cells and protects the pack with an active fuse. The pack is wired to the battery terminals of a low-voltage hybrid or off-grid inverter and reports its state of charge and limits through the PCS port.

The three sizes share one architecture. SE-F5 Pro stores 100Ah (5.12kWh) and allows 100A continuous with 150A for 120 seconds. SE-F12 stores 235Ah (12.03kWh) and SE-F16 314Ah (16kWh); both discharge at 230A continuous with 280A peaks for 10 seconds, while charging is limited to 230A on SE-F12 and 160A on SE-F16. Deye recommends a 90% depth of discharge for all three.

Versions, lifetime and warranty

Each model is built in three versions that differ in the front panel: -L carries the Deye logo, -E an LED strip for state of charge and -C an LCD screen that shows state of charge and error codes. Deye rates the cells for at least 6000 cycles at 25°C to 70% end of life, with an energy throughput of 16MWh for SE-F5 Pro, 37MWh for SE-F12 and 50MWh for SE-F16. The warranty is 5 or 10 years, depending on the country of installation and Deye's warranty letter.

Installation and compatibility

The IP21 enclosure is meant for a clean, dry and ventilated indoor room away from living areas, up to 3000m altitude, with charging allowed from 0 to 55°C and discharging from -20 to 55°C. Packs hang on a wall bracket, stand on the floor or are stacked: up to six layers for SE-F5 Pro and SE-F12, four for SE-F16. The SE-F12/SE-F16 manual classes the enclosure as corrosion level C3, for sites more than 5km from the coast.

In a bank, the packs are daisy-chained from OUT to IN over RJ45 cables and the master pack talks to the inverter through its PCS port, using CAN at 500kbps or RS485 at 9600bps. One inverter can serve several packs, or several inverters can share one bank. SE-F5 Pro has quick-plug DC connectors and a built-in circuit breaker, with 25mm² cable recommended and 100A per pack; SE-F12 and SE-F16 use M8 bolted terminals.

Monitoring and settings

Battery data can be read in Deye Cloud on the system page of a connected Deye inverter with Wi-Fi or a data logger stick. SE-F12 and SE-F16 pair over Bluetooth with the Deye Cloud app for local readings of each pack. SE-F5 Pro gains Bluetooth and Wi-Fi through an optional data logger plugged into its acquisition port, which also allows remote firmware updates. Service staff can read detailed pack data on a PC through a CAN adapter on the IN/OUT ports.

Questions and answers