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

- 【HIGH TRACKING EFFICIENCY】- HQST 12V 20 amp Solar charge controller adopts advanced MPPT technology that ensures fast and stable track of the maximum power point, high tracking efficiency of up to 99%, and peak conversion efficiency of 98%. Maximizing the energy from solar panels to charge your system. It auto-detects 12V or 24V DC system voltages. The max load output current is 20A. If it exceeds the 20 amp DC load (240 watts), the overvoltage protection will turn off the output. - 【PARALELL CHARGE FUNCTION】- 2 HQST MPPT controllers of the same series(M2420N/M2440N/M4860N) can work together to charge the same battery with the parallel charge cable (not included), to meet high power charging requirements and 2 controllers should set the same battery pack voltage. Our negative grounded controller offers overcharging/over-discharging/overload/overheat/short circuit/reverse protection. The maximum degree avoids the damage due to system fault or installation error. - 【LCD SCREEN DISPLAY & REMOTE MONITORING】- 40A solar controller is equipped with an LCD screen and LED fault indicators, which can check device operating data and modify controller parameters. Built-in Bluetooth module, you can download the ‘’ChargePro 2.0'' (new version) or the "PVChargePro'' (old version) app for remote monitoring that keeps 300 days of historical data. PS: the app of android version needs to turn on location and Bluetooth to connect. - 【HIGHER HEAT DISSIPATION EFFICIENCY & FULL-LOAD WORKING】- Die-cast aluminum heat sink makes the heat dissipation efficiency higher, which can minimize the power loss from heat. Filling inside the controller with gel is for better PCBA cooling conduction and prevents water and other damages, extending the controller service life. With the premium IC and better PCBA, this controller can work under full load even in high temperature environment. - 【COMPATIBLE WITH MULTIPLE BATTERY TYPES】- The mppt solar charge controller is compatible with Flooded, AGM, Gel, and Lithium batteries. User mode allows the buyer to set their charging parameters. 3-Stage Charging: boost, float, and equalization. HQST provides a 1-year warranty and lifetime technical support. Any questions, please feel free to contact us through amazon email.

Product description

HQST MPPT Charge Controller

Supports Parallel Wiring

How to Wire Two HQST MPPT Controllers in Parallel

Supports Parallel Wiring

Set the Parameters with Ease

How to Modify the Parameters for Parallel Controllers

Set the Parameters with Ease

HQST Solar System

Why is my controller flashing the error message E02?

Flashing load light with an E04 error message, now what?

How to Connect Bluetooth (BT)

DC load stops working, What can I do?

Two HQST MPPT controllers of the same series support parallel wiring. Combinations like 20A+40A, 20A+60A, 40A+60A, 20A+20A, 40A+40A, 60A+60A all work perfect.

1. Plug in the RS485 cable & turn on the parallel charging function.

2. Find the main controller.

3. Set the right battery type with the main controller, then the sub one's setting will change accordingly.

Why is my controller flashing the error message E02?

It's normal that E02 flashes when the controller detects relatively high voltages. When a Li battery is fully charged, its BMS generates a relatively high volt (about 18V), then it will stop charging. This does no harm to your controller or battery.

Flashing load light with an E04 error message, now what?

E04 indicates that your appliance may have triggered the controller's short-circuit protection. Press the 'Return' key on the controller, or disconnect the appliance that's being powered, then the controller will resume normal work 30s later.

How to Connect Bluetooth (BT)

For Android Users: 1) Allow location first, 2) Tap the BT icon in the app, 3）Select PVChargePro.

For iOs Users: 1) Tap the BT icon in the app, 2) Select PVChargePro.

DC load stops working, What can I do?

Four Solutions For You:

1.Set the load mode to 17.

2.Check the indicators for abnormalities.

3.Press the 'return' key on the controller.

4.Open ChargePro2.0, enter the Real-Time Monitoring page, and turn off the DC Load Short-circuit Protection.