PV Vehicle-Mounted Systems
0102030405
12/24V 20A MPPT Solar Charge Regulator for RV Camper, Yacht Marine and Off-Grid Battery System
Product description
The MPPT solar charge controller manages battery charging from solar panels. Its built-in MPPT maximum power point tracking module can detect the output voltage of solar panels in real time and track the optimal voltage and current (VI) values, enabling the system to charge the battery at maximum power output.
Used in solar photovoltaic systems, it coordinates the operation of solar panels, batteries and loads, and protects batteries against overcharge and over-discharge.
- Advanced dual-peak or multi-peak tracking technology, when the panel is shaded or part of the panel is damaged, the I-V curve will come into being multiple peaks, and the controller can still accurately track the max power point.
- Built-in maximum power tracking algorithm, which is about 20% higher than the traditional PWM charging efficiency, can significantly improve the energy utilization efficiency of PV systems.
- Up to 99.9% MPPT tracking rate.
- Supporting gel batteries, sealed batteries, open batteries, lithium batteries,etc.
- Current-limit charging mode. When the power of the panel is overload and the charging current is greater than the rated current, the controller automatically reduces the charging power to operate it at the rated charging current.
- Support battery voltage automatic identification.
- LED fault indication, LCD abnormal information indication, convenient for the user to determine the system fault.
- LCD screen shows device running data and status, and supports controller parameter altering.
- Standard MODEBUS protocol to meet the communication needs on different occasions.
- External Bluetooth, mobile phone app connection, to view solar charging and battery storage in real time.
Product Parameters
(Note: * n When the system voltage is 12 v, n = 1; When the system voltage is 24V, n = 2)
| Parameter name | Parameter |
| Model | GS-M2420N |
| System voltage | 12V/24V Auto (FLD/GEL/SLD) Manual (Li/User) |
| No-load loss | 12mA(12V),10mA(24V) |
| Maximum solar input voltage | <100Voc |
| Rated charging current | 20A |
| Maximum input power of photovoltaic system | 300W/12V 600W/24V |
| Optically controlled voltage | 5V*n |
| Light controlled time | 10s |
| Rated discharge current | 20A |
| Operating temperature | -35ºC ~ +45ºC |
| Protection class | IP32 |
| Weight | 1.0kg |
| Communication mode | RS485(Modbus) |
| Altitude | ≤ 3000 m |
| Size | 180*140*71 mm |
| Battery type | FLD | SEL | GEL(Default) |
USER (configurable) |
LI (configurable) |
|
Equalizing charge voltage |
14.8V*n | 14.6V*n | —— | Default:GEL | —— |
|
Boost charging voltage |
14.6V*n | 14.4V*n | 14.2V*n | Default:GEL | 默认14.2V*n |
|
Floating charge voltage |
13.8V*n | 13.8V*n | 13.8V*n | Default:GEL | —— |
|
Increase the charge return voltage |
13.2V*n | 13.2V*n | 13.2V*n | Default:GEL | —— |
|
Overdischarge return voltage |
12.6V*n | 12.6V*n | 12.6V*n | Default:GEL | —— |
|
Overdischarge voltage |
11.1V*n | 12.6V*n | 12.6V*n | Default:GEL | Default 11.1V*n |
|
Temperature compensation coefficient |
-3mV/2V/℃ | -3mV/2V/℃ | -3mV/2V/℃ | Default:GEL | —— |
Schematic Diagram
Product Display
Relevant Information
1.1 Basic Definitions
A solar charge controller, also known as a photovoltaic charge-discharge controller, is a key power electronic device in off-grid or hybrid energy systems.
Its core functions include real-time monitoring of PV module output, battery status and load demand, dynamically adjusting energy flow through built-in algorithms to achieve safe and efficient charge-discharge management of batteries.
It also provides multiple protections such as overcharge, over-discharge, reverse polarity, short circuit, over-temperature and lightning protection, which significantly extend the service life of energy storage units and ensure the stable operation of photovoltaic power supply systems.
Its core functions include real-time monitoring of PV module output, battery status and load demand, dynamically adjusting energy flow through built-in algorithms to achieve safe and efficient charge-discharge management of batteries.
It also provides multiple protections such as overcharge, over-discharge, reverse polarity, short circuit, over-temperature and lightning protection, which significantly extend the service life of energy storage units and ensure the stable operation of photovoltaic power supply systems.
1.2 Core Role in Photovoltaic Systems
-
Off-grid systems: As the core control unit, it operates without grid support and relies entirely on PV plus energy storage. The controller directly determines system efficiency and safety, making it critical for ensuring power supply in remote areas and mobile scenarios.
-
Hybrid / microgrid systems: As a scheduling node connecting PV, energy storage, grid power / wind power, it achieves multi-source complementarity and energy optimization, guaranteeing uninterrupted power supply during grid failures.
-
Residential / industrial and commercial energy storage: By optimizing charge-discharge strategies, it increases power generation revenue by 10%–30% and reduces operation and maintenance costs, serving as an essential component of integrated PV-storage systems.
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