Safety Instructions

1. Make sure your battery has enough voltage for the controller to recognize the battery type before first installation.

2. The battery cable should be as short as possible to minimize loss.

3. The regulator is suitable for lead acid batteries (Flood, AGM, GEL) and lithium ions. It is not suited for nickel metal hydride or other batteries.

4. The charge regulator is only suitable for regulating solar modules. Never connect another charging source to the charge regulator.

5. The controller will be hot during operation. Please install the controller on a smooth, well‑ventilated surface.

Product Features

1. Built‑in industrial micro controller.

2. Big LCD display, all adjustable parameters.

3. Fully 3‑stage PWM charge management.

4. Built‑in short‑circuit protection, open‑circuit protection, reverse protection, over‑load protection.

5. Dual MOSFET reverse current protection, low heat production.

LCD Display / Key

MENU: switch between different displays or enter/exit settings.

UP: increase value.

DOWN: decrease value / ON‑OFF load.

System Connection

1. Connect the battery to the charge regulator (plus and minus).

2. Connect the photovoltaic module to the regulator (plus and minus).

3. Connect the consumer to the regulator (plus and minus).

Note: Reverse order applies when uninstalling.

Display / Setting

Main display, battery type, float/CV voltage, discharge reconnect, discharge stop, work mode.

Press Menu to browse. Long press Menu to set parameters.

Technical Parameter

Model: 2420 / 2440

System Voltage: 12V / 24V AUTO

Charge Current: 10A / 20A / 30A / 40A

Discharge Current: 10A / 20A / 30A / 40A

Max Solar Input: <50V

Float Charge Voltage: 13.7V (default, adjustable)

Discharge Cut‑off Voltage: 10.7V (default, adjustable)

Discharge Recovery Voltage: 12.6V (default, adjustable)

USB Output: 5V / 2A

Self‑consumption: <10mA

Operating Temperature: –35°C to +60°C

Troubleshooting

Charge icon not on when sunny → Solar panel disconnected or reverse polarity → Reconnect.

Load icon off → Mode setting wrong → Set again.

Load icon on → Battery voltage low → Recharge.

Load icon slow flashing → Overload → Reduce load.

Load icon fast flashing → Short circuit → Auto reconnect.

Power off → Battery voltage low or reverse polarity → Check battery/connection.