Guangzhou LTB2420 Solar Charger Controller User Manual
- June 17, 2024
- GUANGZHOU
Table of Contents
Solar charger controller
User manual
Revision: Rev 01
Date: 10-23-2023
Product features
- Bluetooth series solar controller, support for mobile app wireless Bluetooth connection, support battery type and load mode parameter configuration and real-time monitoring of device status.
- Protection function: charging over voltage, over current protection; load short circuit, over current protection; battery low voltage, over voltage protection; equipment internal overheating protection and lightning protection.
- The battery supports 12/24V self applicability and supports USB phone charging.
Installation instructions
- The installation holes and dimensions of the controller are shown in Figure 1.
- Connecting System Components: as shown in Figure 2, first connect the battery, and the controller will automatically recognize the type of 12V/24V battery. During the power on period, the red, yellow, and green LED indicator lights on the panel will flash for 3 seconds at the same time. Then, if the battery is 12V, the yellow light will remain on for a long time. If the battery is 24V, the yellow indicator light will continue to flash for 3 seconds. Then, connect the solar photovoltaic panel, and finally connect the load to complete the entire system connection.
Status indicator
Blue LED （BLE）| Slow flashing| Disconnect| Yello LED
（Battery）| ON| Battery normal
---|---|---|---|---|---
ON| connected| flashing| Battery low
Fast flashing| Activity status| |
Red LED （Load）
| OFF| Load off| ****
Green LED （Charge）
| OFF| No sunlight or not
enough sunlight
ON| Load on| Fast flashing| Bulk charge
Slow flashing| Overload| ON| Absorption charge
Fast flashing| Short circuit| Slow flashing| Float charge
Load Mode
Keep On| Load output controlled by battery
voltage only
| Manual| Manual load control
---|---|---|---
Light| Dusk to dawn mode| Light+Timer| Load output turned on
during 1-
23 hour after sunset
Light+Repeat| Light-controlled cycle interval timing| Repeat| 24
hour cycle interval timing
Segmaints| Segmented real-time timing (up to 5 groups)
Battery Type
Battery type| Sealed| Gel| Flooded| LiFePO4|
Lithium| Custom
---|---|---|---|---|---|---
Battery voltage| 12/24V| 12/24V| 12/24V| 12V/24V| 12V/24V| 12V/24V
Equalization charge duration| 0 Min| 0 Min| 120 Min| 0 Min| 0 Min| 120
Min
Equalization charge interval| 0 H| 0 H| 720 H| 0 H| 0 H| 720 H
Absorption charge| 0.0V| 0.0V| 14.8V/29.6V| 0.0V| 0.0V| 14.6V
Bulk duration| 120 Min| 120 Min| 120 Min| 120 Min| 120 Min| 120 Min
Bulk voltage| 14.4V/28.8V| 14.2V/28.4V| 14.6V/29.2V| 14.2V/28.4V|
12.6V/25.2V| 14.4V/28.8V
Bulk recovery voltage| 13.0V/26.0V| 13.0V/26.0V| 13.0V/26.0V|
13.0V/26.0V| 12.0V/24.0V| 13.0V/26.0V
Float voltage| 13.7V/27.4V| 13.7V/27.4V| 13.7V/27.4V| 13.35V/26.7V|
11.4V/22.8V| 13.7/27.4V
Low voltage disconnect| 11.2V/22.4V| 11.2V/22.4V| 11.2V/22.4V|
11.2V/22.4V| 8.7V/17.4V| 11.2V/22.4V
Low voltage reconnect| 12.6V/25.2V| 12.6V/25.2V| 12.6V/25.2V|
12.6V/25.2V| 9.9V/19.8V| 12.6V/25.2V
Technical specifications
| Product model | LTB2410 | LTB2420 | Self-consumption | <10mA |
|---|---|---|---|---|
| Rated change current | 10A | 20A | Charge mode | PWM |
| Rated load current | 10A | Wireless connections | BLE 4.0 | |
| Battery voltage | 12V/24V Auto Select | Weight | 150g | |
| Maximum solar voltage | 50V | Dimension (h x w x d) | 115x95x30mm | |
| USB outputs | 5V/2A |
Protections
| 1、Reverse polarity connection of the solar panels.
2、Reverse polarity connection of the battery.
3、Low voltage disconnect.
4、>110% and <160% load: Shuts down after 60sec. 5、>160% load: Shuts down after
5sec.
6、Short circuit: immediate shut down.
7、Over-temperature protection.
Operation
-
APP Download and Installation
Scan the QR code below, download and install the LiMu Solar mobile app. As shown in Figure 3-4 below.
https://www.limutech.com/download/limu_solar.html -
APP connection.
Open the app and click on the Bluetooth logo in the upper right corner. After searching for the device, click on the device to connect; The initial password is “666666” As shown in Figure 3 and Figure 4, the device status after successful connection is shown in Figure 5.
-
Device parameter setting function
Select the battery configuration on the settings page, select the corresponding battery type, and click the send button to complete the parameter configuration. As shown in Figures 6 and Figure 7.
NOTE – When changing different battery types, if the battery voltage is recognized by AUTO, the system will automatically restart the device after successful setting. After restarting, the device needs to be reconnected.
-
Device parameter setting function
Select the load configuration on the settings page, select the required load mode and parameters, and click the send button to complete the parameter configuration. As shown in Figure 8 and Figure 9.
-
Device logs and information
Select Log to view the device operation log, as shown in Figure 10; Click on information to view device information, as shown in Figure 11 below.
This device complies with part 15 of the FCC Rules. Operation is subject to
the following two conditions: (1) This device may not cause harmful
interference, and (2) this device must accept any interference received,
including interference that may cause undesired operation.
Any Changes or modifications not expressly approved by the party responsible
for compliance could void the user’s authority to operate the equipment.
Note: This equipment has been tested and found to comply with the limits
for a Class B digital device, pursuant to part 15 of the FCC Rules. These
limits are designed to provide reasonable protection against harmful
interference in a residential installation.
This equipment generates uses and can radiate radio frequency energy and, if
not installed and used in accordance with the instructions, may cause harmful
interference to radio communications. However, there is no guarantee that
interference will not occur in a particular installation. If this equipment
does cause harmful interference to radio or television reception, which can be
determined by turning the equipment off and on, the user is encouraged to try
to correct the interference by one or more of the following measures:
- Reorient or relocate the receiving antenna.
- Increase the separation between the equipment and receiver.
- Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
- Consult the dealer or an experienced radio/TV technician for help.
RF waning for Portable device:The device has been evaluated to meet general RF exposure requirement The device can be used in portable exposure condition without restriction