Abstract

In the photovoltaic energy storage era, efficient management of solar power generation has become a pain point for every household. For instance, traditional meters are often constrained by wired connections, which make installation cumbersome and positions fixed. As a result, this leads to inflexible deployment of energy storage systems. Moreover, users must constantly worry about the backflow issues caused by photovoltaic equipment during power generation. Fortunately, Deye’s SUN-SMART-CT01 smart meter, equipped with its advanced LoRa wireless communication technology and precise anti-backflow functionality, will completely revolutionize this landscape. Therefore, this article delves into the principles, implementation methods, and application scenarios of the LoRa wireless meter, ultimately helping you understand why it is the ideal choice for enhancing household energy efficiency.

Keywords: Deye Smart CT；Anti-Backflow Meter；AC Coupled Storage；LoRa Communication Advantages

LoRa Technology Principle: The Core of Low-Power Long-Distance Communication

LoRa (Long Range) is a free, open-source, low-power wireless network technology invented by Semtech Corporation. Specifically, it primarily utilizes free radio frequencies such as 433MHz, 868MHz, or 915MHz. In contrast to traditional communication methods, LoRa employs a gradually modulating signal akin to a bird’s chirp. Consequently, this not only renders the signal less susceptible to interference but also enables better penetration through walls and other obstacles. For example, even in complex multi-story homes, LoRa’s signal transmission can effortlessly cover a 200-meter radius.

Furthermore, LoRa’s implementation relies on the following key parameters:

• Spreading Factor (SF): Adjusts from basic to advanced levels—higher settings reach farther but slow down data speed. LoRa meter uses a balanced mid-level for steady signals up to 200 meters away.
• Bandwidth: Set narrow for super-low battery drain, with quick bursts that last just milliseconds.
• Coding Rate: Adds smart error fixes to catch and repair data glitches, keeping loss near zero.

In addition, in the Deye LoRa wireless meter, the LoRa module is integrated into the smart current transformer (CT), allowing real-time remote monitoring of distant energy storage equipment (e.g., on a balcony). Unlike traditional meter installations that require extensive wiring, the LoRa meter eliminates such concerns. Thus, it is particularly ideal for retrofitting older residential buildings.

Installation Flexibility: LoRa Wireless Communication Reshapes Energy Storage Layout

Benefiting from LoRa’s remote wireless communication technology, you simply embed the meter into the meter box. At the same time, this allows photovoltaic equipment to “freely relocate”—to the balcony, basement, or living room.

In practical applications:

• Balcony Expansion: You can install the energy storage system on the balcony, combining it with the photovoltaic power generation system, while the meter is installed in the meter box—no need to worry, as LoRa’s communication range fully covers it. Moreover, LoRa can still ensure stable communication even in severe weather.
• Basement Placement: Balcony photovoltaic power generation data is bridged wirelessly via LoRa directly to the energy storage cabinet in the basement. Even penetrating thick concrete walls and multiple floors, LoRa’s strong anti-interference capability ensures millisecond-level low latency.
• Living Room Integration: If you prioritize aesthetics, you can cleverly integrate the energy storage battery into the living room furniture cabinet and view real-time data anytime via the App, without worrying about the clutter caused by wiring.

Moreover, the actual installation of the LoRa meter requires just three simple steps:

1. Clamp the meter onto the main line in the meter box.
2. Configure the SUN-SMART-TX01 transmitter.
3. Pair via the App with the LoRa network for immediate online connectivity.

LoRa Meter vs. Bluetooth Meter: Overwhelming Advantages in Distance and Stability

You might assume that common Bluetooth meters on the market also offer wireless communication capabilities. However, when compared to LoRa, the differences are stark:

Feature	Deye LoRa Wireless Meter	Bluetooth Meter
Communication Distance	200m+ (with wall penetration support)	10-30m (easily disrupted by walls)
Power Consumption	Ultra-low (battery life 5+ years)	Medium (requires frequent charging)
Penetration	Excellent (multi-wall environments)	General (rapid signal attenuation)
Data Rate	Low (ideal for monitoring data)	High (unsuitable for real-time control)
Application Scenarios	Large homes/industrial storage	Small indoor devices

In essence, LoRa leverages CSS (Chirp Spread Spectrum) modulation technology, offering exceptional anti-interference capabilities that make it perfect for signal-obstructed complex home environments. On the other hand, Bluetooth is better suited for short-range, high-frequency interactions, such as quick smartphone pairings. Consequently, LoRa-based meters effectively eliminate signal dead zones. As a result, they enable “zero-latency” responses to anti-backflow commands—even for energy storage units installed on distant balconies—ensuring unwavering system stability.

Core Function of Deye LoRa Wireless Meter: Anti-Backflow

Beyond its long-distance wireless communication, the LoRa wireless meter’s anti-backflow feature stands out as a key highlight for photovoltaic users. For example, in everyday scenarios, traditional solar systems can backflow excess power to the grid if generation exceeds demand. This not only potentially violates local regulations but also poses safety risks. Therefore, Deye’s solution achieves “Zero Export” via the LoRa meter, prioritizing surplus energy for household loads or battery storage.

Additionally, for users with existing traditional photovoltaic setups, integrating new solar storage often involves brand compatibility challenges, necessitating AC coupling. Specifically, AC coupling involves paralleling the energy storage battery into the existing system on the AC side, without altering the original DC-side equipment—a boon for quick upgrades in balcony PV installations. However, in apartments or small homes focused on self-consumption, traditional systems during peak generation send excess power to the grid rather than storage. In response, in AC coupling mode, the LoRa meter real-time monitors grid-side power direction and wirelessly instructs inverters (e.g., Deye micro-inverters) to divert surplus energy to batteries.

Detailed Explanation of the Anti-Backflow Mechanism

1. Real-Time Monitoring: Installed in the meter box, the LoRa meter uses high-precision CT sensors (supporting single-phase L1/N or three-phase L1/L2/L3/N) to track grid-side current direction and magnitude. Moreover, with a sampling frequency up to 1kHz, it ensures millisecond-level responsiveness.
2. LoRa Data Transmission: Monitoring data is encrypted (AES-128) and transmitted via the LoRa module, with latency as low as 50ms to prevent signal loss.
3. Inverter Regulation: Deye hybrid inverters (e.g., SUN-5K-SG05LP1-EU) receive the data and dynamically adjust output power. For instance, upon detecting backflow tendencies, the inverter promptly lowers the MPPT tracking point or shifts to battery charging mode, maintaining zero grid current.
4. Offline Protection: Should LoRa signals fail, the meter supports local threshold configurations, defaulting the inverter to a safe mode.

This closed-loop mechanism ensures regulatory compliance while maximizing self-consumption rates. According to Deye professional testing, self-use rates can exceed 95% in sunny peak-generation scenarios.

Furthermore, the LoRa meter incorporates intelligent load management: Via the Deye Cloud App, users can define priority loads (e.g., air conditioners, EV charging stations), enabling automatic solar energy allocation without manual interventions.

Conclusion: LoRa Wireless Meter, Ushering in Your Intelligent Energy New Era

As the “brain” of photovoltaic energy storage, the LoRa wireless meter transforms energy management from “passive” to “proactive.” In doing so, it propels the sustainable evolution of home solar storage systems. If you’re planning residential or commercial energy storage setups, consider trying Deye’s SUN-SMART-CT01 smart meter. Finally, we invite you to visit the Deye online store to discover more intelligent solutions!

Reference list：

[1] Product Overview Leaflet Global English – https://www.deyeinverter.com/deyeinverter/2025/08/07/%25E3%2580%2590b%25E3%2580%2591productoverviewleaflet_globalenglish_20250807_en.pdf

[2] Wireless Energy Management System – https://www.deyeinverter.com/deyeinverter/2025/09/23/wirelessenergymanagementsystem.pdf

[3] SUN-SMART-CT01 Manual – https://www.deyeinverter.com/deyeinverter/2025/09/19/%25E3%2580%2590b%25E3%2580%2591manual_sun-smart-ct01_30240301004804_20250919_en-1.pdf

[4] Deye ESS Brochure Global 2025 V2.6 – https://fr.deyeinverter.com/deyeinverter/2025/05/27/rand/64/deye%2520ess%2520brochure_global%2520v2.6.pdf

[5] Battery Brochure Global English – https://www.deyeinverter.com/deyeinverter/2025/09/25/rand/1376/%25E3%2580%2590b%25E3%2580%2591battery%2520brochure_global%2520english_20250925_en.pdf

[6] Hybrid Inverter Brochure – https://www.deyeinverter.com/deyeinverter/2025/03/19/brochure-250319-za.pdfMove upMove downToggle panel: AIOSEO Settings