With the rapid advancement of renewable energy, villa photovoltaic-storage systems—green energy solutions integrating solar power generation and energy storage—are becoming the preferred choice for villa owners.

 

  These systems not only efficiently utilize solar resources to reduce dependence on traditional power grids, but also provide emergency power supply during sudden outages, comprehensively enhancing living comfort and electrical safety. In the operation and management of villa photovoltaic-storage systems, electricity meters serve as the core equipment for energy measurement.

 

 Their connection methods directly determine system measurement accuracy, operational efficiency, and electrical safety, making them a critical component in ensuring stable system operation.

 

 

1. Electricity metering of villa light storage system

 

1.1 Electric Energy Metering Scheme

 

   Traditional household integrated energy storage systems primarily serve single-family residences. These systems feature high power specifications and stringent requirements for long-term stable operation, functioning as the core energy hub of households while fulfilling two key roles: ensuring basic power supply and optimizing electricity billing.

 

    For villa balcony solar-storage scenarios, WiFi meter solutions demonstrate remarkable adaptability. The streamlined villa layout allows easy planning for anti-backflow meters and inverters, while maintaining stable WiFi coverage to meet essential metering and communication needs.

 

 

 

 

For scenarios lacking WiFi coverage or experiencing weak signals, where costlier 485 wiring solutions are not feasible, point-to-point transparent transmission has emerged as the preferred solution.

 

The WIFIhalow communication module combination offers both stability and ease of use, with this technology currently deployed primarily in Europe and Australia. Due to domestic frequency band restrictions, it has not yet been adopted in China.

 

 

1.2 electricity metering device

 

The ADL200W/ADL400W series external transformer dual-circuit radio energy meters are smart instruments specifically designed for renewable energy generation scenarios such as photovoltaic grid-connected systems, micro-inverter systems, energy storage systems, and AC coupling systems. These meters feature high measurement accuracy, compact size, rapid response, and easy installation. The series enables precise monitoring and measurement of various power parameters including real-time power, supports communication protocols like Modbus-TCP and HTTP, and connects to inverters or Energy Management Systems (EMS) via WiFi or LoRa.

They perform functions such as anti-reverse flow control, power generation regulation, and battery charge/discharge management, while supporting bidirectional metering to meet the full-process energy management needs of household distributed photovoltaic systems.

 

 

2. Guide to Meter Installation and Wiring

 

2.1 Dimensions of electricity meter and its transformer

 

(Note: Refer to the meter's factory manual for exact dimensions to ensure proper installation space and compatible equipment.)

 

2.2 current voltage wiring diagram

 

The wiring must comply with the following specifications: Single-phase meters should only connect to Phase A; ADL¨-CT/¨-1-¨ meters require only CT1 connection;

 

For electrical safety, a 5A fuse must be installed at the voltage input terminal; All equipment must be completely de-energized before wiring to eliminate hazards;

 

ADL200W-CT models use one CT per CT group, while ADL400W-CT models use three CTs per CT group, with wiring standards varying by model.

 

 

3. Summary of the Technical Advantages of Meter

 

Compact and efficient design: Featuring a 1P specification with 18mm standard rail mounting, it seamlessly accommodates four application scenarios—single-phase, dual-phase, single-three-phase, and dual-three-phase configurations—fulfilling diverse photovoltaic-storage system requirements for villas.

 

Wireless connectivity: Fully compatible with both LoRa and WiFi, it ensures efficient and stable power data transmission, adapting to diverse villa communication environments.

 

Design of plug-and-play voltage terminals: The terminals are easy to install and remove, paired with a press-type wiring fixation method that significantly reduces wiring complexity, enhances installation efficiency, and meets the needs of rapid on-site deployment.

 

Adaptive wiring intelligence: Featuring built-in wiring diagnostics to accurately detect abnormal connections, it works in tandem with the inverter to perform CT failure diagnosis, automatically adjust voltage/current phase shifts, and reverse current adjustments, ensuring metering accuracy.

 

Ultra-fast electrical parameter updates: With a mere 50ms update cycle, real-time power data synchronization ensures precise support for system dispatching and energy management.

 

Comprehensive and rigorous certification: The product has obtained multiple authoritative certifications including CE-RED, ROHS, REACH, and SGS, meeting both domestic and international standards for new energy equipment applications, ensuring compliance and reliability.

 

 

 

 

Conclusion

         

   In villa photovoltaic-storage systems, smart meters have evolved from basic energy measurement tools into the central hub of home energy management. By collecting real-time power data, implementing intelligent control strategies, and coordinating various devices, these systems not only enhance operational safety and cost-effectiveness but also drive the transition from passive energy consumption to proactive energy management.

 

      As power metering technology and IoT integration deepen, smart meters will further empower villa photovoltaic-storage systems, enabling more accurate power generation forecasting, flexible energy storage scheduling, and low-carbon electricity usage patterns.

 

    For villa owners pursuing quality living and sustainable development, selecting smart meters tailored to their needs is a crucial step in building a smart home energy ecosystem.