The Sigenergy Sigen Sensor Sub1G Kit is a wireless communication accessory that links Sigenergy CT/power sensors and meters to a SigenStor inverter or Energy Controller without running a physical RS485 cable between them. Supplied as a matched pair of DIN-rail mounted radio modules — an AP (master/access point) unit and an STA (slave/station) unit — it bridges the gap wherever a consumer unit, meter cabinet, or sensor location sits too far from the inverter for conventional wired RS485 to be practical.
Using WiFi HaLow (IEEE 802.11ah) sub-1GHz wireless technology, the kit is purpose-built for long-range, low-power industrial and home energy monitoring applications, where standard 2.4GHz WiFi struggles to penetrate walls or cover distance. Each unit mounts directly to a standard DIN rail alongside consumer unit components, and both are rated for continuous mains-adjacent operation.
200m
Transmission Range
868 MHz
Wireless Frequency
802.11ah
WiFi HaLow Protocol
2 W
Max Power Draw
DIN35
Rail Mounting
AP + STA
Kit Contents
What's In The Box
This kit is supplied as a matched pair: one AP (master device) unit installed near the inverter/gateway, and one STA (slave device) unit installed near the remote sensor or meter. Both are required together and are not sold individually.
When To Use This Kit
Reach for the Sub1G Kit whenever a CT clamp, power sensor, or third-party meter needs to sit further from the SigenStor inverter than a wired RS485 run can practically reach — for example, where the consumer unit and inverter are in different outbuildings, on opposite sides of a large property, or separated by structural walls that make cable routing difficult or costly. It is also useful in retrofit installations where opening up walls to run new signal cable is undesirable. With a lab-tested open-space range of up to 200m, it comfortably covers most detached garages, barns, or secondary consumer units on a single residential plot. In typical UK homes with a conventional room layout and internal walls, expect a working range noticeably below the 200m open-space figure, since walls and obstructions reduce effective distance.
Long-Range Sub1G Wireless
Delivers efficient and stable data transmission up to 200m in open-space conditions, removing the need for a physical signal cable run.
WiFi HaLow Standard
Built on IEEE 802.11ah (WiFi HaLow), a sub-1GHz wireless standard designed for longer range and better wall penetration than conventional 2.4GHz WiFi.
Single & Three-Phase Compatible
Works with both single-phase and three-phase Sigenergy sensors, making it a universal accessory across the SP2 and TP2 inverter ranges.
System Health Monitoring
Designed to monitor and recover from abnormal situations, helping maintain a reliable link between sensor and inverter without manual intervention.
Dual Communication Modes
Supports both RS485 and wireless communication, giving installers flexibility to fall back to a wired connection if ever required.
Simple DIN Rail Installation
Mounts directly to a standard DIN35mm rail inside a consumer unit or enclosure, consistent with other Sigenergy communication accessories.
General
Working mode
AP (master device) / STA (slave device)
Communication method
RS485 / wireless communication
Network protocol
IEEE 802.11ah (WiFi HaLow)
Wireless frequency
868 MHz
Wireless transmission distance
Up to 200 m (open-space, lab-tested)
Electrical
Operating voltage
85 – 277 Vac
Maximum power
2 W
Mechanical & Environmental
Dimensions (W / H / D)
18 / 118 / 66 mm
Operating temperature range
-25°C to 55°C
Installation method
DIN35mm rail mounting
Real-World Range
Sigenergy's 200m range figure is based on lab tests in open, unobstructed space. Communication distance will be shorter wherever internal or external walls sit between the AP and STA units — plan the installation with a reasonable margin rather than relying on the maximum quoted figure.
What's the difference between the AP and STA units?
The AP (Access Point) unit acts as the master device and is typically installed close to the inverter or gateway. The STA (Station) unit is the slave device, installed close to the remote sensor or meter it needs to communicate with. Both are included in this kit and are needed to complete the wireless link.
Will this work through walls?
Yes, to a degree — sub-1GHz WiFi HaLow penetrates walls better than standard 2.4GHz WiFi, but the manufacturer's 200m range figure is for open, unobstructed space. Expect a reduced working range once walls, floors, or other structural obstructions sit between the two units.
Can I use this with a three-phase Sigenergy system?
Yes. The kit is compatible with both single-phase and three-phase sensors, so it can be used across SP2 and TP2 Sigen Hybrid Inverter installations.
Does this replace the need for a wired RS485 connection entirely?
It replaces the need for a wired connection between the AP and STA units only. Each unit still supports RS485 communication with the sensor or inverter it's directly wired to; the wireless link simply bridges the gap between the two DIN-rail units themselves.
