SQ-M340BPotted Controllers

MPPT Boost Bluetooth

MPPT boost Bluetooth controller — 20A charging, 40W output, up to 95.37% charging efficiency, suits 140W PV panels.

Designed for single-cell LiFePO4 systems — cells in parallel, no battery protection board needed, high capacity utilization, lower PACK cost
Industrial-grade MCU all-digital technology — no trim resistors, strong anti-interference, no aging or drift
Charging conversion efficiency up to 95.37% and MPPT tracking efficiency ≥99.9% with significantly reduced temperature rise
Smart charging management (MPPT + CV trickle) keeps the battery in shallow charge/discharge cycles, greatly extending service life
Smart LED drive: automatic light control, 8-segment dimming with independent power per segment
IR communication — discharge curve fully programmable via engineering remote
Complete protection: battery reverse-polarity, PV reverse-polarity, reverse discharge at night, under-voltage, LED open/short-circuit

Technical Specifications
Electrical		Electrical
Max charging current	20A	Standby consumption	50–80–100µA
Standby consumption	50–80–100µA
Battery type	LiFePO4 (single-cell)	System voltage	3.2V (2.6–3.6V)
System voltage	3.2V (2.6–3.6V)
Max PV panel power	140W	Charging method	MPPT
Charging method	MPPT
Discharge method	Boost constant-current, constant-power	Charging voltage range	9–18–25V
Charging voltage range	9–18–25V
Startup voltage	4–7V	LED drive current	1.55A
LED drive current	1.55A
LED drive voltage range	9–27–30V	Max LED drive power	40W
Max LED drive power	40W
Max boost conversion efficiency	91% (85%–95%)
Protection & Environment		Protection & Environment
Protection rating	IP65	Operating temperature	-40°C to 125°C
Operating temperature	-40°C to 125°C
Mechanical & Others		Mechanical & Others
Dimensions	90×80×29 mm	Weight	≈0.22 kg
Weight	≈0.22 kg
Packaging	50 pcs/carton