48kWh-30kW Photovoltaic-Thermal Hybrid Energy Storage System

System Architecture and Technical Specifications

48kWh Energy Storage Battery: Utilises lithium iron phosphate cells with a design life exceeding 10 years, supporting wide-temperature operation (-10°C to +55°C). Laser welding technology ensures cell consistency. Equipped with NXP automotive-grade BMS chips, featuring overcharge/overdischarge protection, passive balancing technology, and CAN 2.0 communication interfaces. The system supports master-slave operation, intelligently managing balancing resistors to mitigate the ‘bottleneck effect’. It enables separate control of charging and discharging processes, ensuring uninterrupted power supply continuity.

30kW Sine Wave Inverter: Employing mains-frequency pure sine wave technology, it supports three operating modes: online, standby, and pure inverter. DC input voltage range: 400–800V; AC output rated power: 30kW; voltage accuracy: ±3%; efficiency up to 92%. Features switching capability to ensure uninterrupted power supply, suitable for off-grid applications.

20KW Three-Phase Charger: Utilises three-phase neutral-free AC input with up to 95% efficiency, supporting a wide output voltage range (100V-1000Vdc). Incorporates an intelligent discharge circuit with standby power consumption below 8W, operating within -40℃ to 75℃ environments. Supports constant power output (400V-750Vdc) with configurable charging parameters via LCD display. Suitable for photovoltaic storage, power systems, and DC charging stations.

50A Mppt Solar Controller: Utilises maximum power point tracking technology, dynamically adjusting impedance via DC/DC conversion circuits to ensure photovoltaic arrays consistently operate at maximum power point. Supports algorithms including conductance increment and interference observation methods to enhance power generation efficiency. Incorporates a boost circuit to broaden module input voltage range, accommodating low-light conditions and reducing battery charging losses.

Energy-efficient conversion: The system achieves bidirectional DC-AC conversion via inverters, supporting off-grid operation. The photovoltaic controller performs real-time maximum power point tracking to enhance solar generation efficiency. Integrated with energy storage batteries, it delivers a unified ‘PV + storage’ solution, increasing self-consumption rates and reducing electricity expenditure.

Intelligent management and protection: The BMS system supports insulation leakage detection and thermal management, interlocking with fire safety systems to enhance security. The system incorporates overload protection, short-circuit protection, and backflow prevention to ensure stable operation. It supports peak-off-peak pricing strategies, charging during off-peak hours and discharging during peak periods to optimise electricity costs.

Versatile Applications: Suitable for domestic backup power, small factories, outdoor emergency power supply, and mobile medical applications. In remote areas or regions with unstable grid supply, it provides reliable power support to safeguard production and daily living requirements.