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Customer Reviews

REC Master


Build your Master/Slave Multi-string power system as a kit and save 5% on all accessories!

Use the Master Kit builder to build a system tailored to your specifications.

For high current applications up to 16 cells/bank and 15 parallel banks:
REC Master/Slave Parallel Pack Kit Builder
For High voltage applications up to 240 cells in series:
REC Master/Slave Series Pack Kit Builder

REC BMS Master 9M:

The REC BMS Master supports many battery chemistries including:

Li-PO, LiFePO4, LiFeYPO4, LiCoO2, LiMnNiCo and LiMnO4 Lithium-Ion chemistry
Master + max 15 Slave combination (max 240 cells)
compatible with all REC BMS units
single cell voltage measurement (0.1 – 5.0 V, resolution 1 mV)
single cell internal resistance measurement
single cell under/over voltage protection
SOC and SOH calculation
over temperature protection (up to 3 temperature sensors per Slave unit)
under temperature charging protection
passive cell balancing up to 1.3 A per cell with LED indication
shunt current measurement (resolution 10 mA @ +/- 300 A)
3 galvanically isolated user defined multi-purpose inputs/outputs
4 programmable relays (normally open and normally closed option)
12 V galvanically isolated supply (10.5 – 15 V)
galvanically isolated RS-485 and CAN communication protocol
error LED + buzzer indicator
internal battery powered real time-clock (RTC)
PC user interface for changing the settings and data-logging (optional accessory)
LCD touch display for monitoring (optional accessory)
hibernate switch

Weight 0.5 kg
Dimensions 15 × 12 × 4 cm
system nominal voltage

12V, 24V, 48v, Custom


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SKU: REC Q/SI Master Category: