In today's rapidly evolving landscape of distributed energy storage systems, achieving precise coordination between photovoltaic (PV) generation, user loads, and grid energy remains a core issue in technological advancement. Hinen's 5kW AC Coupled Single-phase All-in-one Residential Energy Storage System, the A Series AC5S, leverages innovative dual CT (Current Transformer) technology to achieve breakthrough upgrades in system intelligence, installation efficiency, and data accuracy. This redefines the value boundaries of user-side energy storage systems.
Limitations of Single CT Mode: The Gap Between "Passive Response" and "Proactive Perception"
Currently, mainstream single CT solutions control the charging and discharging behavior of energy storage systems by monitoring the current direction and parameters of smart meters, aiming to make the grid-side current as close to 0A as possible. However, this approach has two major limitations:
1. Single Dimension Data: Relying solely on the current direction from the meter for strategy decisions fails to simultaneously perceive real-time changes in PV generation power and user load, leading to response delays in energy storage scheduling.
2. High Installation Complexity: Traditional smart meter CT installations require professional technicians, complex wiring, and pose risks of incorrect connections, increasing deployment costs.
Dual CT Technology Architecture: Building a Three-Dimensional Perception Network for Energy Flow
The dual CT solution adopted by Hinen's A Series AC5S deploys high-precision CT sensors on both the grid side and the load side, forming a bidirectional data collection channel. This provides several key functional upgrades:
- More Accurate Current Measurement: Simultaneously measuring forward and reverse currents ensures complete and accurate data.
- Comprehensive Data Visualization: Real-time synchronized collection of PV generation power, user load demand, and grid interaction power is presented through a dedicated APP, providing a full picture of energy flow.
- Dynamic Strategy Optimization: Based on predictions of PV output and load fluctuation characteristics, automatically adjust charge/discharge thresholds to maximize self-consumption rates and reduce peak electricity purchase costs.
- Anti-backflow Function: Effectively prevents backflow incidents, ensuring system safety and stability.
- Rapid Fault Localization: Cross-validation of dual-channel data can precisely identify anomalies in PV inverters, sudden changes in line losses, etc., enhancing system reliability.
Improved Installation Efficiency: Clip-on Design
Unlike the cumbersome wiring process of traditional CTs, Hinen's dual CT adopts a clip-on structural design that simplifies installation steps and enhances deployment efficiency.
Scenario-based Intelligent Control: Extending Value from Devices to Ecosystems
Dual CT technology not only brings hardware-level upgrades but also supports Virtual Power Plant Integration, users can upload generation/consumption data via API interfaces to participate in grid demand response programs and share revenue.
- AI Energy Diagnosis: Identify high-energy-consuming equipment based on load characteristics and provide energy-saving renovation suggestions.
Technological Evolution Trend: Universalization Prospects of Dual CT Standards
With increasing regulatory requirements for the accuracy of distributed energy metering across countries (such as EU MID directives and China's GB/T 34133 standards), dual CT technology is becoming the standard for new-generation energy storage systems due to its full-chain data traceability. The 5kW AC Coupled all-in-one RESS A Series AC5S uses dual CT technology to build a "perception-analysis-decision" closed-loop control system, overcoming inherent flaws in single CT systems and initiating the transition of user-side energy storage from "energy storage devices" to "smart energy hubs."
