HQST MPPT Solar Charge Controller 20 Amp Negative Grounded Controller with Bluetooth LCD Display 12V/24V DC Input Solar Panel Regulator for Gel Sealed Flooded and Lithium Battery

Product Description 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 Package Included: 1 x 20A MPPT Solar Charge Controller 1 x Temperature Sensor 1 x User Manual HQST 20A MPPT Solar Charge Controller with Built-in Bluetooth 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 Wiring Two MPPT Controllers of the Same Series in Parallel Two units of the same series(M2420N/M2440N/M4860N) could work together to charge the same battery bank through the parallel charge cable(parallel cables are NOT included). You can combine 20A+40A 20A+60A 40A+60A 20A+20A 40A+40A 60A+60A. Higher Heat Dissipation Efficiency and Charging Power The 20A MPPT solar controller filled with gel inside is more efficient to dissipate heat. Compared with conventional MPPT controllers the HQST controllers can increase the charging capacity by at least 8% at high temperature. After testing under the same full load the charging power of conventional 20A MPPT controllers decreased by 60% after 20 minutes and the charging power of the HQST 20A MPPT controller only decreased by 8% after 90 minutes of operation.