Smart Mppt Solar Charge Controller,30A 40A,12V 24V 36V 48V Auto,APP Remote (WiFi/Bluetooth) RS485,120V PV,LiFePO4 Lead Acid Gel

Dear friends all over the world, we sincerely invite you to take your time to check out this premium product.

（1）Equipped with high-power inductors and ARM Cortex-M4 core processor! This high-performance MPPT solar charge controller features powerful computing capability for parallel multitasking without lagging or crashing, with a maximum tracking efficiency ≥99%!
（2）Supports Bluetooth + WiFi remote control (Dual-link operation: Bluetooth 5.0 for local communication & 2.4G WiFi for cloud IoT access). Full-range remote intelligent control is available via dedicated mobile APP!
（3）All models are built-in RS485 interface, supporting standard Modbus bus data transmission and reception.
（4）Automatically identifies 12/24/36/48V battery systems; compatible with sealed lead-acid, gel, flooded lead-acid, 4-cell LiFePO4, 3-cell ternary lithium batteries, and customizable battery parameter settings.
（5）Comes with 8 load control modes: always-on, light control, light control with timer, voltage trigger, segmented timing, cycle mode and more.
（6）Comprehensive all-round hardware protection:
PV: Overvoltage Protection, Reverse Connection Protection,Reverse Charging Protection;Battery: Overvoltage Protection, Over‑discharge Protection,Reverse Connection Protection;Load: Overcurrent Protection, Short Circuit Protection;Overheat Protection, TVS Lightning Protection;
（7）Built-in functions: 5V 2A USB output, fault log storage, power consumption statistics, device local clock synchronization, OTA firmware upgrade.
（8）Multi-channel LED status indicators, voltage & current calibration calculation supported.
（9）Max PV input voltage range: 80V - 120V
（10）The supporting APP currently supports English, French, German, Spanish, Portuguese, Italian, Polish, Dutch, Japanese and Chinese. More languages will be continuously updated in subsequent iterations.

【12/24/36V：30A 40A】

Model：LTM2430 LTM2440
System Voltage：12V/24V/36V Adaptive
Battery Voltage：10V~43.2V
Max PV Voltage：80V

Max Charging Current：
LTM2430：12/24V（30A） 36V（20A）
LTM2440：12/24V（40A） 36V（25A）
Max Load Current:30A

Max PV Power:
LTM2430:（390W/12V）（780W/24V）（780W/36V）
LTM2440:（520W/12V）（1040W/24V）（1040W/36V）

Wireless Communication：Bluetooth BLE5.2/WiFi 2.4G
RS485 Communication：RS485 interface, default baud rate 115200

Conversion Efficiency：92%~99%
MPPT Tracking Efficiency：≥99%
USB Interface：5V 2A
Terminal Block:Max. 6AWG/13mm²
Operating Temperature：-25°C~+50°C
No-load loss：0.7W-1.2W
Housing Material：Flame‑retardant ABS + Aluminum Alloy Heat Sink Back Cover
Protection Degree：IP20
Cooling Method：Natural Heat Dissipation
Weight：0.95kg
Dimension：171mm×121mm×59mm

【12/24/36/48V：30A 40A】

Model：LTM4830 LTM4840
System Voltage：12V/24V/36V/48V Adaptive
Battery Voltage：10V~57.6V
Max PV Voltage：120V

Max Charging Current：
LTM4830：12/24V（30A） 36/48V（40A）
LTM4840：12/24V（40A） 36/48V（25A）
Max Load Current：30A

Max PV Power:
LTM4830：（390W/12V）（780W/24V）（975W/36V）（1040W/48V）
LTM4840：（520W/12V）（1040W/24V）（1170W/36V）（1300W/48V）

Wireless Communication：Bluetooth BLE 5.2/WiFi 2.4G
RS485 Communication:RS485 interface, default baud rate 115200

Conversion Efficiency：92%~99%
MPPT Tracking Efficiency：≥99%
USB Interface：5V 2A
Terminal Block：Max. 6AWG/13mm²
Operating Temperature：-25°C~+50°C
No-load loss：0.7W-1.2W
Housing Material：Flame‑retardant ABS + Aluminum Alloy Heat Sink Back Cover
Protection Degree：IP20
Cooling Method：Natural Heat Dissipation
Weight:0.95kg
Dimension:171mm×121mm×59mm

*Safest Wiring Connection Sequence:
Connect the battery first (BATTERY)
Then connect the load (LOAD)
Finally connect the solar panel (PV)
Disconnection Sequence:
Disconnect the solar panel (PV) first
Then disconnect the load (LOAD)
Finally disconnect the battery (BATTERY)

Frequently Asked Questions

⚠️ When installing the controller, connect the battery first to allow the system to identify the battery voltage, then connect the PV panels.
> When removing the battery, disconnect the PV panels first before detaching the battery. Otherwise, the controller may be damaged.

**Q1: My battery is 12V. Which type of controller should I choose?**
A1: If your battery is 12V or 24V, you can select a controller with automatic 12V/24V identification. If your battery is 48V, you should choose a 48V controller.

**Q2: I know the power and voltage of my PV panel. How do I figure out the required current rating of the controller by myself?**
A2: Generally speaking, you can calculate the suitable current specification of the controller based on the power and voltage of your PV panel. Example 1: If the PV panel is 300W 36V, the calculation is 300 ÷ 36 = 8.33A, so a 10A controller should be selected.
Example 2: If the PV panel is 300W 12V, the calculation is 300 ÷ 12 = 25A, in which case you need to choose a 30A controller.

**Q3: What voltage PV panels should be matched with a 60V battery?**
A3: To charge a 60V battery, you need PV panels with an operating voltage of 75V and an open‑circuit voltage of 82V or higher; otherwise, the battery cannot be fully charged to 100%.
To charge a 48V battery, you need PV panels with an operating voltage of 60V and an open‑circuit voltage of 66V or higher; otherwise, the battery cannot be fully charged to 100%.

**Q4: Can a 12V 60W PV panel boost voltage to charge a 48V battery?**
A4: This requires a controller with boost function to make the 12V 60W PV panel charge a 48V battery, but our controller does not have this function.

**Q5: What is the maximum input voltage of the controller? What is the maximum wattage of PV panels that can be matched?**
A5: For controllers designed for 12/24V systems, the maximum input voltage shall not exceed 50V. For 48V and 60V systems, the maximum input voltage shall not exceed 100V.
For example, a 60V 20A controller can be matched with PV panels up to 1200W in total. Exceeding this power rating will damage the controller.