This is a high-quality, brand new, powerful 20A 12V/24V solar charge controller designed to protect batteries while charging them. It has automatic cut off to prevent over-charging and deep discharge. The controller uses PWM (Pulse Width Modulation) technology, which increases charge acceptance and prolongs the life of your battery. It can recover some lost battery capacity and stops reverse current at night (from the battery back to the solar panel) to prevent loss of charge.

The controller has many other protection functions such as overcharge/discharge, overload, short circuit, overheating, etc. Other features include LED indicators, a temperature sensor, and a load "on/off" button. One of the greatest benefits of this powerful 20A controller is its small size - only 16x8cm. This controller can work with sealed, gel, and flooded batteries (the default is sealed) or a user-defined battery type (please note battery type can only be changed from default using one of the communication methods listed below).

The controller can accept up to 320W (12V battery) / 640W (24V battery) of solar power input, making it a perfect choice for small or medium solar PV systems with a battery and load, such as in a campervan or boat. This model also features advanced communication technology, which offers the user the opportunity to monitor and program parameters for the solar charge controller through various methods:

1) The controller can be connected to a remote meter MT50 with an LCD screen, which displays system performance information and allows the user to manually adjust parameters and load settings.

2) The controller can be connected to a Wi-Fi module to create a Wi-Fi network, to which your mobile phone or tablet can connect, in order to monitor or adjust charging parameters and controller settings through a free mobile app (available for Android and iOS users).

3) An RJ45 to USB cable can be used to connect the controller directly to your PC/laptop, where parameters and settings can be monitored and adjusted via a free computer program - Solar Station Monitor (Windows-based PCs and laptops only).

Using one of these communication methods, the user will gain access to various charging parameters such as voltage, current (separately for solar panel/load), battery state of charge, accumulated charge and discharge energy, min/max voltage, and other information. If required, the user will also be able to amend the battery type and capacity, set charging volts for different charging stages, specify the duration of each charging stage, create a user-defined battery type with charging parameters specific to their battery (if the pre-existing options are unsuitable), personalize the 'load' settings (e.g. set timers for lighting, fans, pumps), and more.

In addition to the built-in temperature sensor, the controller has a pair of terminals for connecting a remote temperature sensor, which can be attached directly to the battery to measure the battery temperature more precisely and optimize the charging process.

Specifications:

- Rated current: 20A

- Fully automated operation and auto 12/24V selection

- Wide solar input voltage range up to 50V

- 3 pairs of terminals (input, battery, output)

- LEDs to indicate charging, battery and load

- Temperature sensor for automatic compensation (-3mV/°C/2V)

- Overload protection (≥1.05 times the rated discharge current)

- Short circuit protection (≥2 times the rated discharge current)

- Overcharge/discharge, overheating, and other protection features

- Self-consumption: ≤8.4mA (12V) / ≤7.8mA (24V)

- Working temperature: -35°C to +50C

- Terminals for wire up to 10mm2

- Size: 15.9 x 8.1 x 4.8 cm

- Weight: 300 g

- Multiple mounting holes for ease of installation

- 1-year warranty

Installation:

This product comes with an instruction manual that explains connections and operations (see Documents tab). If you need help with installation or have any technical questions, we can provide FREE support - please contact us by email or phone.

20A solar charge controller / regulator 12/24V for camper / caravan / boat