The Wireless Signal Transmitter enables real-time connectivity and seamless radio communication between the Smart Meter and the inverter, eliminating the need for traditional RS485 cabling.

Each package includes a pre-paired transmitter and receiver, making installation fast and effortless.

With a transmission range of up to 800 meters in open environments, the system ensures stable, long-distance connectivity. Operating on the reliable 868 MHz frequency, the transducer delivers strong performance even in demanding conditions.

This Plug-and-Play solution is factory-paired and ready to use straight out of the box. Maximum range is achieved in line-of-sight conditions, when the two antennas can “see” each other without obstacles, and there is a clear, unobstructed visibility between the two antennas. For cases where this is not possible, we can provide a 10-meter extension cable that can be used to lead the antennas to the roof, to the side of the building, to a place where the two antennas can communicate clearly.

Key benefits

• Wireless replacement for an RS485 cable
• Designed for RS485 / Modbus communication
• Suitable for Smart Meter ? solar inverter communication
• 868 MHz radio communication
• Available in 100 m, 400 m and 800 m versions
• Factory-paired transmitter and receiver
• No Wi-Fi required
• No Internet connection required
• No cloud connection required
• Suitable for residential, commercial and industrial installations
• External antenna option available
• 10 m antenna extension cable available for difficult installations
• Compact enclosure suitable for electrical cabinets
• 3-year warranty
• Worldwide delivery

When should you use a wireless RS485 bridge or why do you need the RS485 Signal Transducer on radio?

This device is an excellent solution for places where cable connection is not possible or difficult. Or it would simply not be aesthetically pleasing.

A concrete example is the case when you need to connect a remote Modbus device outdoors. Whether you would install the wiring on a pole or underground, you would need special wiring, not to mention cable pulling or digging.

The Levtech Wireless RS485 Bridge is useful when:

1. The Smart Meter and inverter are far apart

If the Smart Meter is installed near the electrical distribution board while the inverter is located elsewhere, installing a new RS485 cable can be inconvenient.

The wireless bridge allows the two devices to communicate without running a long physical RS485 cable.

2. There is no suitable cable route

Sometimes the problem is not the distance but the building itself.

Walls, floors, concrete structures, roads, yards or existing installations can make cable installation difficult or expensive.

3. You need to avoid drilling or excavation

For some installations, routing a new cable means drilling through walls or running cables underground.

A wireless RS485 connection can eliminate this work when radio communication conditions are suitable.

4. The RS485 cable would be visually undesirable

In residential, commercial and architectural installations, running a visible communication cable may not be desirable.

5. You need to connect equipment in separate locations

The wireless RS485 bridge can be used where two RS485 devices are installed in different locations and a suitable radio path can be established.

Why 868 MHz?

The system operates in the 868 MHz radio band, which is widely used for industrial and wireless communication applications in Europe.

Compared with higher-frequency wireless technologies such as 2.4 GHz Wi-Fi, 868 MHz radio can be advantageous for certain long-range applications because lower-frequency radio signals generally have different propagation characteristics and can perform well over longer distances and through some obstacles.

However, the actual range depends on the installation environment.

For the most reliable communication, the antennas should have a clear line of sight whenever possible.

How does the wireless RS485 bridge work?

The principle is simple:

Smart Meter ? RS485 ? Levtech transmitter ? 868 MHz wireless link ? Levtech receiver ? RS485 ? inverter

The Levtech system transfers the RS485 communication wirelessly between the two devices.

The wireless bridge does not replace the Smart Meter or inverter and does not process the meter data in the cloud. Its purpose is to replace the physical RS485 communication path with a radio connection.

This makes it particularly useful when the Smart Meter and inverter cannot be conveniently connected with a cable.

Available transmission ranges

The Levtech Wireless RS485 Bridge is available in two versions: 400 m for larger residential installations and light industrial applications and 800 m for industrial installations and longer-distance connections.

The specified distance is a maximum open-area transmission range. Actual performance depends on the environment, antenna position, building construction, interference and other radio conditions.

Important: line of sight

The best results are achieved when the two antennas have a clear line of sight.

If the Smart Meter and inverter are separated by a building, reinforced concrete wall or another significant obstacle, the antennas may need to be relocated.

For difficult installations, a 10-meter antenna extension cable can be used to move an antenna to a more suitable position, such as a roof, exterior wall or another location with better radio visibility.

Plug-and-play installation

The wireless transmitter and receiver are supplied as a factory-paired set.

For compatible preconfigured applications, this significantly simplifies installation: connect the RS485 interfaces and power supplies, position the antennas correctly, and establish the wireless link.

For applications requiring communication parameter changes, the RS485 communication parameters can be configured according to the connected equipment.

The device supports configurable:

• Baud rate
• Parity
• Stop bits
• Device address / communication parameters where applicable

For configuration, a computer and USB-to-RS485 converter can be used.

https://levtech.ro/product/signal-transmitter-rs485/

Compatible Solar Inverters and Smart Meters

The Levtech Wireless RS485 Bridge is designed to provide a wireless RS485 communication link between compatible solar inverters, Smart Meters and other RS485 devices.

It is particularly useful when a Smart Meter must communicate with a solar inverter but installing a physical RS485 cable is difficult, expensive or impractical.

The wireless bridge replaces the physical RS485 communication cable while allowing the connected devices to continue communicating through their normal RS485 interface.

Solar inverter brands

The Levtech Wireless RS485 Bridge can be used in compatible RS485 applications involving solar inverters from major manufacturers, including:

• Huawei
• Solis
• GoodWe
• Growatt
• Fronius
• SMA
• Victron Energy
• Sungrow
• Sofar Solar
• Deye
• SolaX
• SAJ
• Kostal
• SolarEdge
• FoxESS
• LuxPower
• Sigenergy
• Sunsynk
• Solplanet
• Afore
• Ginlong
• Kehua
• MUST
• Voltronic Power
• Megarevo
• SRNE

Compatibility depends on the exact inverter model, RS485 interface, communication parameters and Smart Meter configuration.

If your inverter brand or model is not listed above, contact Levtech. The system can potentially be used with other RS485/Modbus RTU-compatible solar inverters as well.

Smart Meter brands and models

The wireless RS485 bridge can be used to connect compatible Smart Meters and energy meters to solar inverters.

Common Smart Meter brands and product families include:

Huawei Smart Meters

• Huawei DTSU666
• Huawei DTSU666-H
• Huawei Smart Power Sensor
• Huawei three-phase Smart Meter solutions

Levtech offers a dedicated wireless RS485 solution for the Huawei DTSU666 Smart Meter.

Solis Smart Meters

• Solis Smart Meter
• Acrel ACR10R-D16TE
• Compatible Solis RS485 energy meter configurations

GoodWe Smart Meters

• GoodWe Smart Meter
• GoodWe GM3000
• GoodWe GM1000
• Compatible GoodWe RS485 energy meter configurations

Growatt Smart Meters

• Growatt Smart Meter
• Growatt TPM
• Compatible Growatt three-phase Smart Meter configurations

Fronius energy meters

• Fronius Smart Meter 63A
• Fronius Smart Meter TS 65A-3
• Fronius-compatible RS485 energy meter configurations

SMA energy meters

• SMA Energy Meter
• Compatible SMA RS485 / Modbus energy metering configurations

Other energy meter manufacturers

Depending on the communication parameters and RS485 configuration, the system can also be considered for compatible meters from manufacturers such as:

• Eastron
• Carlo Gavazzi
• Janitza
• Socomec
• Schneider Electric
• ABB
• Siemens
• Acrel
• Chint
• DDS
• SDM
• Moxa-compatible RS485 systems

Always confirm compatibility for the exact Smart Meter model before installation.

Need help choosing the right wireless RS485 solution?

If you are planning to connect a Smart Meter and solar inverter wirelessly, send us:

1. Smart Meter manufacturer and model
2. Inverter manufacturer and model
3. Approximate distance between the two devices
4. Whether there are walls, buildings or other obstacles between them
5. Whether the installation is residential, commercial or industrial

We can help you determine which Levtech Wireless RS485 version is appropriate for your installation.

Contact Levtech

Levtech Service & Production SRL
Romania
Email: office@levtech.ro
Phone: +40 761 318 594

Product summary

Product: Wireless RS485 Signal Transmitter / RS485 Wireless Bridge
Application: Smart Meter ? Solar Inverter wireless communication
Interface: RS485
Protocol: RS485 / compatible Modbus RTU applications
Frequency: 868 MHz
Range: 400 m / 800 m
Connection: Wireless point-to-point RS485 communication
Power: 100–270 VAC
Best suited for: Solar PV, Smart Meters, inverters, industrial automation and remote RS485 devices

Levtech Wireless RS485 Bridge – replace the cable, keep the RS485 communication.

Technical specifications

Specification

Value

Product

Levtech Wireless RS485 Signal Transmitter

Product code

LSP-STR-485

Communication interface

RS485

Typical protocol

Modbus RTU / RS485 serial communication

Wireless frequency

868 MHz

Transmission range

400 m / 800 m

Supply voltage

100–270 VAC

Baud rate

9600–115200 baud

Parity

None / Even / Odd

Stop bits

1 / 2

Antenna connector

SMA

Status indication

Red / Blue LED

Dimensions

80 × 85 × 25 mm

Installation

Electrical cabinet / suitable enclosure

Communication wiring

RS485 A / B / GND

Warranty

3 years

What is included?

Each wireless RS485 system includes:

• 1 × wireless RS485 transmitter
• 1 × wireless RS485 receiver
• Antenna(s)
• Connection hardware as supplied for the selected version

The transmitter and receiver are supplied as a paired set.