The TS-4850L series low voltage solar charge controller module is a rack-mounted MPPT maximum power point tracking photovoltaic charging unit specially developed for 48V communication DC power supply systems. Adopting a digital DC-DC boost topology, it supports low-voltage PV module access and provides intelligent charging management for 48V lead-acid and lithium iron phosphate battery packs in off-grid and hybrid solar-storage power supply scenarios. With a standard 1U hot-swappable rack design, the module can be mixed-installed and parallelly expanded with communication rectifier modules. It is widely used in communication base stations, field industrial equipment and unattended solar energy storage systems, effectively reducing grid power consumption and improving power supply stability and new energy utilization rate.
Key Features：
1. High-precision & High-efficiency MPPT Charging
The MPPT tracking efficiency reaches up to 99.5%, supporting multi-peak shadow recognition to accurately track the maximum power point under complex working conditions such as low light, cloudy weather and partial shading. The peak overall conversion efficiency is 97.6%, with low energy loss in the full load range and excellent energy-saving performance. The wide PV input voltage design adapts to various series combinations of low-voltage PV panels and matches the configuration of small and medium-sized photovoltaic arrays.
2. Modular Hot-swappable Expansion Design
It supports lossless hot-swap technology, which allows plugging and unplugging with power without interfering with normal system operation, eliminating system power-off during maintenance and greatly reducing operation and maintenance costs and downtime risks. Intelligent current sharing parallel connection is supported, with a maximum of 6 modules paralleled in a single system. It can be mixed-installed with 48V rectifier modules of the same series in one power cabinet to realize an integrated hybrid power supply solution of solar energy and mains electricity.
3. Full-compatibility Intelligent Charging Management
Built-in 4-stage intelligent charging logic (constant current fast charging, constant voltage equalizing charging, floating charging and balanced charging) is compatible with various batteries including maintenance-free lead-acid batteries, gel batteries, flooded batteries and 48V lithium iron phosphate batteries. Equipped with a battery temperature compensation function, it automatically adjusts the charging voltage according to ambient temperature to avoid overcharging and undercharging, greatly extending battery service life. It supports automatic power derating protection at high temperature to ensure stable operation in extreme temperature environments.
4. Comprehensive Safety Protection
It is equipped with complete multi-level electrical protection, including PV reverse connection, battery reverse connection, input and output short circuit, over current, over voltage, over charging and anti-backflow protection. It adopts a smart temperature-controlled speed-adjustable fan, matched with dual thermal protection of high-temperature power derating and over-temperature shutdown to avoid equipment damage caused by high temperature. The built-in night anti-backflow circuit completely prevents reverse discharge from the battery to PV modules and avoids power loss. Integrated TVS lightning and surge protection adapts to complex field electromagnetic environments.
5. Industrial-grade Communication & Monitoring
Equipped with an isolated RS485 communication interface and standard Modbus-RTU protocol, it can be seamlessly connected with computer room environment monitoring systems and upper computer management platforms. It uploads real-time core operating data including PV voltage, PV current, battery voltage, charging power, module temperature and fault alarms. LED indicator lights on the panel display the status of operation, charging, fault and communication intuitively. The built-in isolated 5V auxiliary power supply can stably supply power for external sensors and acquisition devices.
6. Industrial-grade Reliability
Adopting imported industrial-grade power devices with stable performance and low failure rate, it supports stable operation in an ultra-wide temperature range of -40℃~+65℃. The whole machine is designed with dustproof, shockproof and anti-interference performance, and has passed CE, IEC, ISO and other safety certifications. With excellent electromagnetic compatibility, it will not interfere with precision equipment such as base station wireless and transmission devices, fully adapting to harsh working conditions such as field base stations, outdoor computer rooms and unattended stations.
