H20TB Boost-Type MPPT Solar Charge Controller

Product Overview

Introducing the H20TB Boost-Type MPPT Solar Charge Controller—a cutting-edge core component for off-grid solar PV systems. Professionally researched and designed, this device revolutionizes solar charging solutions for electric vehicles and significantly enhances energy utilization efficiency across various off-grid PV applications. This MPPT solar charge controller features an ultra-wide battery voltage compatibility range of 36V to 90V. It is compatible with Ternary Lithium, Lead-Acid, and Lithium Iron Phosphate (LiFePO4) batteries, and also supports user-customizable battery parameter settings, making it an ideal choice for a diverse array of solar charging scenarios within the global market. The core advantage of the H20TB lies in its integration of industry-leading Maximum Power Point Tracking (MPPT) technology. With an MPPT tracking efficiency exceeding 99.9% and a tracking speed of less than 1 millisecond, the device ensures that the solar panel array continuously locks onto its maximum power point in real-time, regardless of fluctuations in external conditions such as light intensity or ambient temperature. Unlike traditional PWM charge controllers—which often fail to fully harness the potential of solar panels—the H20TB dynamically adjusts the solar panel’s input voltage and current. This boosts overall energy utilization efficiency by 20% to 30%, delivering a higher charging current to the battery. Consequently, solar-powered devices and electric vehicles achieve more efficient energy harvesting while simultaneously extending battery lifespan.
Constructed using high-end manufacturing processes and premium-quality components, the H20TB MPPT solar charge controller features a high-grade aluminum heat sink. It employs a dual-cooling mechanism—combining natural convection with forced air cooling—and incorporates high-temperature power derating capabilities. This ensures stable and efficient operation even under extreme working temperatures ranging from -35°C to 65°C (with no power derating losses occurring below 45°C, provided there is adequate ventilation). In addition to its robust physical structure, the product features comprehensive built-in software and hardware fault detection and protection mechanisms. These include multi-layered safeguards covering PV over-voltage, reverse polarity, and short-circuit protection; reverse-discharge protection during nighttime hours; battery over-voltage and under-voltage protection; load short-circuit and overload protection; and over-temperature protection. The multi-layered protection design not only effectively prevents damage to the controller and external components caused by installation errors or system malfunctions, but also ensures the long-term safety and stability of the entire solar power system. The controller supports simultaneous full-power charging and discharging—a highly practical feature that maximizes solar energy utilization by allowing the system to power external loads while simultaneously charging the battery, all without any loss of performance. Furthermore, the device integrates a suite of practical functions, including adjustable charging current, customizable full-charge parameters, temperature compensation, and parallel charging capabilities. This allows both professional installers and end-users to configure and fine-tune the solar system to meet their specific requirements.
In terms of connectivity and intelligent operation, the H20TB MPPT solar charge controller is engineered for seamless integration and remote management. It supports dual communication modes—RS485 and TTL—utilizing the standard Modbus protocol, with a default baud rate of 9600 (configurable up to 115200 via host software). Optional Bluetooth and Ethernet communication modules are available to enable advanced wireless and wired remote monitoring and control. Additionally, an auxiliary 12V output port (max current ≤150mA) provides a convenient power source for peripheral devices. The unit features an intuitive display interface that allows for real-time monitoring of key system data, including battery State of Charge (SOC), PV voltage/current/power, battery voltage/temperature, load status, and the various charging stages (trickle, constant current, and constant voltage). A built-in backlight ensures data remains clearly visible under all lighting conditions. The controller also incorporates user-friendly DIP switches for quick selection of battery types and voltage specifications, as well as tactile buttons that support custom battery voltage settings. All configuration parameters are automatically saved, eliminating the need for repetitive adjustments and significantly streamlining the operational workflow. Boasting a compact and lightweight design—measuring just 94.5 × 170 × 36 mm and weighing only 0.46 kg—the product features an IP32 protection rating, making it ideal for installation in well-ventilated indoor environments. It is equipped with dedicated grounding screw terminals; when properly grounded, the device safely diverts leakage currents, static electricity, and lightning-induced surges into the earth, thereby further enhancing operational safety. Furthermore, the controller features a historical data storage function capable of recording key operational metrics—such as total accumulated charge and daily power generation—thereby providing essential data support for the performance analysis and optimization of the solar system.
The H20TB MPPT solar charge controller is engineered specifically for durability and low maintenance; it contains no internal components requiring periodic servicing, and its robust construction effectively guards against dust and water splashes. This makes it ideally suited for a wide range of industrial and commercial off-grid PV applications—particularly scenarios involving solar charging for electric vehicles, small-scale off-grid solar power stations, and mobile solar energy systems. Whether you are designing a solar charging solution for electric bicycles or motorcycles, or constructing a residential or commercial off-grid solar system, this MPPT solar charge controller delivers unparalleled performance, compatibility, and stability. Having undergone rigorous quality testing and backed by a comprehensive after-sales service system, it stands as the definitive choice for those seeking to maximize the efficiency and longevity of their solar power systems. By seamlessly integrating cutting-edge MPPT technology with solid engineering design, this product delivers a solar charge controller that not only meets but exceeds the demands of the global renewable energy market.
Keywords: MPPT solar charge controller

Product Features

Core performance parameters

1. Power and current: Maximum solar panel adaptation power of 800W, rated battery charging current of 15A, maximum photovoltaic input current of 20A; MPPT tracking efficiency>99.9%, tracking rate<1ms, charging conversion efficiency>96%, achieving efficient capture and conversion of solar energy.
2. Voltage adaptation: The photovoltaic open circuit voltage supports 16V~60V, and the recommended photovoltaic power point voltage is 16V~52V. The maximum withstand voltage of the system is 100V (± 2%); The battery is compatible with a wide voltage range of 36V~90V and is compatible with lithium iron phosphate, ternary lithium, lead-acid/colloidal batteries. Custom batteries can set their own undervoltage and overvoltage points within the 36V~90V range.
3. Static power consumption: ≤ 30mA, low-power design effectively reduces energy loss in non working state and improves the overall energy efficiency of the system.

Battery and working mode

1. Battery management: Supports trickle/constant current/constant voltage three-stage charging, with adjustable charging current, full charge parameters, and battery charging temperature control, with temperature compensation function; Supports parallel charging to meet the needs of high-power charging scenarios, while also supporting accurate display of SOC power to monitor battery status in real-time.
2. Working mode: The system is in boost mode, and the load supports manual/automatic dual mode (which can be independently configured through the upper computer); The charging status can be recognized in real time, supporting the preservation of historical data, recording key indicators such as total power generation and daily power generation, which facilitates system performance analysis.

Communication and external functions

1. Communication configuration: Supports RS485 and TTL dual communication with standard Modbus protocol, with optional baud rates of 4800/9600/1440/19200/38400/56000/57600/115200, default 9600 (can be modified on the upper computer); Optional Bluetooth and Ethernet communication modules for wireless/wired remote monitoring and control.
2. External output: Expanded 12V power supply interface, maximum output current ≤ 150mA, can provide stable low-voltage power supply for various auxiliary equipment, and meet the power needs of peripheral equipment in the system.

Protection and Security

1. Full dimensional protection: equipped with PV overvoltage/reverse connection/short circuit protection, night anti reverse charging protection, input power limit protection, and over temperature protection; Battery overvoltage/undervoltage/overcurrent/over temperature/low temperature protection; Load short circuit/overload/primary overcurrent/secondary overcurrent protection, multiple protections to prevent equipment damage and safety hazards.
2. Temperature protection: When the equipment exceeds the temperature limit, it will automatically reduce power or turn off charging; Battery over temperature protection supports external NTC temperature sensors. Charging stops when the temperature exceeds the set value, and the temperature drops below 5 ℃ for 2 seconds before automatically recovering. Precise temperature control ensures the safety of the battery and equipment.

Physical and environmental parameters

1. Structural dimensions: The length, width, and height of the body are 94.5 × 170 × 36mm, with a net weight of 0.46kg. The compact and lightweight design saves installation space and facilitates layout in various scenarios.
2. Heat dissipation and protection: Using high-quality aluminum heat sinks, combined with natural heat dissipation and air cooling dual cooling methods, the fan intelligently starts and stops according to temperature; Protection level IP32, dustproof and splash proof, suitable for use in multiple environments.
3. Working temperature: -35 ℃~65 ℃ Wide temperature operation, no derating operation within 45 ℃ when well ventilated, can adapt to extreme climates such as high cold and high temperature, and suitable for use in different regions around the world.

Display and operation

1. Display interface: Equipped with a high-definition display screen, the default backlight is always on (it stays on while charging, automatically turns off after 10 minutes without charging, and can be awakened by turning on and off), displaying real-time core data such as photovoltaic/battery/load voltage, current, power, as well as charging status, battery type, temperature, SOC power, etc.
2. Operation configuration: Equipped with a body dial switch, it can quickly select battery type, voltage specifications, and Chinese English interface; Equipped with touch buttons and start switches, supporting custom battery voltage settings, all parameter settings are automatically saved without the need for repeated debugging; Support factory reset and solve various configuration issues.

Other parameters

1. Wiring interface: Adopting KF2EDGR specification interface, including load, battery, and photovoltaic input interfaces, RS485 communication interface can be externally connected to Bluetooth/4G/WIFI/Ethernet remote modules, equipped with ground screw holes, and supports reliable grounding.
2. Protocol and Function: Communication is based on the standard Modbus RTU protocol, supporting function codes such as 0x02/0x03/0x04/0x05/0x06/0x10, to achieve data reading, writing, and batch configuration; The device supports fault code display, which can quickly locate the fault types of modules such as photovoltaic, battery, and load, facilitating maintenance and repair.