Photovoltaic-storage DC-coupled integrated machine

Core Components and Technical Advantages

1. Photovoltaic Grid-Connected Module
   It incorporates a high-efficiency photovoltaic inverter (such as a string inverter with a conversion efficiency of over 98.5%) and supports MPPT (Maximum Power Point Tracking) function. This allows dynamic adaptation to changes in light intensity, maximizing solar energy capture. For example, in oilfields or remote areas with unstable 光照，it can quickly respond to light variations and maintain stable power generation efficiency.
2. Energy Storage Integration Unit
   It is usually paired with a lithium iron phosphate battery pack (with a cycle life of over 6000 times). Through a DC converter, it is directly connected to the DC bus of the photovoltaic module, eliminating the conversion 环节 from photovoltaic AC power to energy storage DC power and reducing energy loss by approximately 5%-8%. Meanwhile, it supports seamless switching between off-grid and grid-connected modes, ensuring uninterrupted power supply in case of grid failure (response time < 50ms).
3. Intelligent Control System
   Equipped with an Energy Management System (EMS), it uses IoT technology to real-time monitor photovoltaic output, energy storage status, and load demand, and automatically optimizes energy distribution strategies:
   • When photovoltaic power is sufficient, it prioritizes meeting load demand, and the surplus electricity is directly stored in the battery;
   • When 光照 is insufficient or at night, it automatically releases stored energy to supplement power supply;
   • In grid-connected scenarios, it can participate in grid peak regulation to achieve "peak-valley arbitrage" (e.g., charging at low valleys and discharging at high peaks).

Typical Application Scenarios

1. Oilfields and Remote Industrial Scenarios
   For high-energy-consuming areas far from the power grid, such as oilfield well sites and mines, it can serve as the core equipment of an independent microgrid, providing stable green power. For example, a 50kW photovoltaic-storage DC-coupled all-in-one machine used at an oilfield wellhead generates approximately 200kWh of electricity per day, meeting the needs of pumping units, monitoring equipment, and other loads, and reducing carbon emissions by over 150 tons annually.
2. Distributed Household/Commercial Energy Storage
   Household rooftop photovoltaics paired with a 10-20kWh all-in-one machine can achieve "self-generation and self-use, surplus electricity storage," reducing reliance on the power grid. Commercial buildings can construct a 100-kilowatt-level energy storage system through multi-machine parallel connection to smooth out peak electricity consumption and reduce electricity costs.
3. Emergency Power Supply System
   Key locations such as hospitals and communication base stations can use it as a backup power source. Photovoltaic charging ensures long-term endurance, and the energy storage module guarantees quick startup in case of power outage. Compared with traditional diesel generators, it is more environmentally friendly and has lower operation and maintenance costs.

Comparison with AC-Coupled Systems

Technical Trends

• Adoption of liquid cooling technology to adapt to high-temperature environments (such as desert oilfields);
• Integration of AI algorithms to predict load and 光照，optimizing charging and discharging strategies;
• Support for 5G/IoT remote monitoring, enabling unmanned operation and maintenance.