T4850HG DC-DC MPPT charger module

T4850HG is 1U high voltage photovoltaic MPPT communication module.  It can extract maximum power in  real time from the solar panels throughout the day.  Module can work in outstanding reliability,efficiency  and power density. It is specially designed for  telecom, network access and data center  applications.

Electrical Specifications

1.1 Input Characteristics

1.2 Output Characteristics

1.2.1 Output Voltage and Current Regulation

Note: The deviation of various adjustable voltage set values and protection voltage set values should not exceed ±0.1V.

1.2.2 Output Ripple and Noise

Note: When testing ripple and noise, the bandwidth is set to 20 MHz.

1.2.3 Output Load Dynamic Response

Note: Load transient cycle is 4ms.

1.2.4 Start-up Output Overshoot

1.2.5 Start-up Time

Note: This is the time from power-on to the output voltage reaching 42Vdc.

1.2.6 Power Conversion Point

Note: When the photovoltaic input voltage is between 340Vdc and 425Vdc, the output power in this range is determined by the photovoltaic characteristics.

1.2.7 Output Characteristics

1.2.8 Temperature Derating

1.2.9 Noise Voltage

1.3 Protection Features

1.3.1 Output Short Circuit Protection

1.3.2 Output Overvoltage Protection

Overvoltage protection is divided into internal and external overvoltage protection. The internal overvoltage fault range is 58.5VDC~60.5VDC and can be set through monitoring. In case of a fault, the module locks. If the external voltage exceeds 63VDC for more than 500ms, the module locks. After entering the locked state, the PV power supply needs to be disconnected and re-powered on to resume operation.

1.3.3 Output Undervoltage Warning

Range: 37VDC~39VDC. When it drops below the undervoltage warning value, normal output continues and an alert is reported.

1.3.4 Input Overvoltage Protection

1.3.5 Input Undervoltage Protection

1.3.6 Undervoltage Protection

Undervoltage protection logic:

In normal operating conditions, when the input power is less than 50W and persists for 5 minutes, the undervoltage flag is set, and the machine shuts down. Otherwise (referring to the shutdown state), when the input voltage is greater than 160V and the bus voltage is greater than 150V, the undervoltage flag is cleared after 5 minutes, and the module restarts.

Minimum module power: 50W

1.3.7 Over-temperature Protection

1.4  Rectifier Module and Monitoring Module Communication Function

Communication between the rectifier module and the monitoring module is conducted via the CAN bus, supporting remote software upgrades. The module can set addresses through the address board. When the AC input is disconnected, the module needs to communicate with the host.

The CAN interface in the rectifier module requires isolated design, and the CAN power supply is +5Vdc provided internally by the rectifier module.

Key monitoring information of the rectifier module includes:

1) Voltage and current regulation: Meets battery boost and float charge requirements, and meets voltage regulation requirements.

2) Single module on/off control.

3) Protection and alarm information feedback:

AC power failure: AC power failure (AC input over/undervoltage);

Module protection: Temperature pre-alarm;

Module faults: Output overvoltage shutdown, fan failure, over-temperature shutdown, or other internal module causes leading to no output (Module is in sleep shutdown state, and AC power failure does not report module faults).

1.5 LED Indicator

The power LED indicators are installed on the front panel of the power module. The output statuses are shown in the table below:

2. Insulation Performance

2.1 Insulation Resistance