HQST 20A MPPT Solar Charge Controller with Built-in Bluetooth, Negative Ground

Description

Great condition, includes plug-in temperature sensor, and I will send a PDF file of the manual.
Auto-recognition of 12/24V battery system
Allows max 25% exceeding rated power
Battery temperature compensation function
Support the parallel connection of two units of the same series(M2420N/M2440N/M4860N)
Gel-filled inside to protect PCBA, improve charging capability and prolong controller life
Built-in Bluetooth module for monitoring and parameters settings(support Chinese, English, Spanish)
Compatible with sealed, gel, flooded, and lithium batteries
Die-cast aluminum design and oversize heating sinks allow for efficient natural heat dissipation
Multiple electronic protections: overcharge/over discharge/ overheat/reverse/overload/short-circuit protection
Battery System Voltage: 12V/24V
Max Solar Charge Current: 20 Amp
Max Load Output Current: 20 Amp
Max PV Input Voltage: 100 Voc
Self-consumption: 12mA/12V; 10mA/24V
Max PV Input Power: 300W/12V; 600W/24V
Communication Port: RS485
Operating Temperature: -31℉ ~ 113℉
Model: M2420N