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Taidacent CN3791 Solar Chargers MPPT Solar Battery Charger 6V 12V MPPT Solar Charge Controller 3.7V 4.2V 2A Li Battery Charging Board Module (6V)

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$9.58

$ 4 .99 $4.99

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1.Size:6v

2.Qty.:

About this item

The input voltage is 6V 12V, corresponding to the solar panel working voltage (nominal voltage) 6V 12V
This is a solar charger used for single cell lithium battery maximum power point tracking (MPPT).
This MPPT solar charger enables you to get as much power as possible from solar panels or other photovoltaic devices and install it in a rechargeable lithium battery.
It is very easy to use, just insert the solar panel into one side of the solar charger, and then insert the battery into the other side, you can start charging!
The output of the solar charger is designed to charge a single polymer lithium-ion battery.

Product Description

Description

This is a solar charger used for single cell lithium battery maximum power point tracking (MPPT). This MPPT solar charger enables you to get as much power as possible from solar panels or other photovoltaic devices and install it in a rechargeable lithium battery. It is very easy to use, just insert the solar panel into one side of the solar charger, and then insert the battery into the other side, you can start charging!

Solar Maximum Power Point Tracking (MPPT) is to ensure that the light intensity changes and the photovoltaic cells output maximum power to make full use of solar energy. Generally, it is necessary to use a switch-mode DC-DC converter to realize the MPPT function, keeping the output voltage and charging current product maximized (output).

The output of the solar charger is designed to charge a single polymer lithium-ion battery. The load should be connected in parallel with the battery. Each solar charger is equipped with a CN3791 power tracking battery charging circuit, and four 2-pin JST/PH2.0 connectors are pre-installed.

By default, we set the holding voltage for MPPT. The input voltage is 6V 12V (corresponding to the operating voltage of the solar panel 6V 12V), which is very suitable for applications with a large voltage difference between the input voltage and the battery voltage.

When the current output capacity of the input power supply is reduced, the internal circuit of CN3791 can automatically track the maximum power point of the solar panel. The user does not need to consider the worst case, and can maximize the output power of the solar panel, which is very suitable for applications using solar panel power supply .

Parameter

Input voltage	select the corresponding module according to the nominal voltage of the solar panel (6V/9V/12V)
Output voltage	nominal 3.7V full charge voltage 4.2V lithium battery
Interface	2-pin JST connectors (or PH2.0)
Max Charging current	2A
PWM switching frequency	300KHz
Charging voltage	4.2V ± 1%
Working environment temp	-40 ° C to +85 ° C
Size	45X20X9.5mm

Interface diagram

CN3791 MPPT Solar Panel Battery Charging Board

Feature

Trickle charging of deeply discharged batteries

Automatic recharge

Charge status and charge end status indication

Soft start Battery overvoltage protection

Solar panel maximum power point tracking

Complete charge management for single-cell lithium batteries

Note

This module has an input voltage of 6V 12V, respectively corresponding to the solar panel operating voltage (nominal voltage) 6V 12V

BigG

Reviewed in the United States on January 14, 2025

Worked exactly as advertised. Built a 6v solar charging setup.

Robert Jackson

Reviewed in the United States on September 3, 2024

Review of Taidacent CN3791 Solar ChargerFor anyone dabbling in DIY electronics or renewable energy projects, the Taidacent CN3791 Solar Charger is a fantastic find. Priced at just $9.58, it offers tremendous value for those who need an efficient solution for charging lithium batteries, particularly in small-scale applications.Features and Performance:The CN3791 is designed to accommodate various voltage systems, supporting 6V and 12V solar panels while effectively charging lithium batteries in the 3.7V to 4.2V range at a current output of 2A. This flexibility makes it a versatile component for a range of projects, from solar-powered garden lights to small battery-operated devices.One of the standout features of this unit is its MPPT (Maximum Power Point Tracking) technology. MPPT is crucial for solar charging as it optimizes the energy transfer from the solar panel to the battery, ensuring maximum efficiency. Users have reported that the CN3791 effectively harnesses available sunlight, even in less-than-ideal conditions, making it a reliable choice for outdoor projects.Build Quality and Usability:While the build quality is generally good for the price, it's worth noting that the module is somewhat delicate, so careful handling is advised during installation. The design is compact, allowing it to fit easily into various setups without taking up too much space. The schematic diagram printed on the board aids in straightforward wiring, making it beginner-friendly.Applications:Whether you're looking to power small gadgets, create solar-powered toys, or design DIY solar chargers for personal use, this module provides an accessible entry point. Its affordability allows hobbyists to experiment without breaking the bank, fostering creativity and innovation in renewable energy setups.Conclusion:Overall, the Taidacent CN3791 Solar Charger is an excellent addition to any DIY enthusiast’s toolkit. It combines affordability, efficient performance, and versatility that few other products in this price range offer. If you're looking for a reliable and cost-effective solution to charge lithium batteries in your projects, this solar charger is undoubtedly worth considering. Just handle it with care, and you’ll have a solid component to power your inventive ideas.

Customer Review

Reviewed in the United States on August 4, 2024

This is a neat, well made little board. Unfortunately I couldn't test this as it does not work with the 6.5V (open-circuit) 3W panel I intended to use it with. Looks like I should have got the 5V board for this panel. My fault.

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