Get in Touch G52S

Solar-powered GPS Tracker


Please note: The G52S is now only produced for specific use cases. Substantial advances in battery technology have led to this product being superseded by our battery powered device range. Learn more about the advantages of Battery Powered GPS Trackers for outdoor asset tracking here.

The G52 Solar’s rugged housing and built in solar panel allows the device to monitor and track assets in harsh and remote environments, without the need for an external power source. This compact 2G or 3G GPS tracking device provides telemetry using the power of the sun.

The SDI-12 interface allows the use of a variety of sensors commonly used in agricultural applications, such as: soil moisture probes, flow meters and humidity sensors. The device's ignition input can also be configured for pulse counting, allowing the use of a tipping rain gauge.

The G52 intelligently adjusts its behaviour to maximise usefulness under different power conditions, and to maximise it's potential to be charged by the sun.

  • Solar panel recharges internal battery
  • IP67 rugged weatherproof housing
  • Multiple inputs and outputs (harness provided)
  • Compact 2G or 3G GPS
  • Agricultural or Tracking Configuration


Agricultural Sensors

Agricultural Sensors

Rugged & Weatherproof

Rugged & Weatherproof

Multiple Inputs & Outputs

Multiple Inputs & Outputs

  • Hardware Features

    Compact Housing

    IP67 rated housing, UV resistant nylon glass composite.

    Dimensions: 126 mm x 80 mm x 33 mm
    Weight: 160 grams (complete unit)

    Solar Panel

    Power Output
    0.3W peak

    Current Output
    Approximately 50mA peak, depending on battery voltage

    Sleep Current
    10µA (micro-amps) with accelerometer on and other sensors off.

    External Power

    Input Voltage
    9-24V DC
    Absolute maximum of 45V DC, but it is not recommended to exceed 24V for thermal reasons

    Input Current
    Trickle charge at <100mA

    Internal Battery

    High temperature Lithium Polymer 800mAh battery

    Battery operating time depends on operating mode

    Operating Temperature

    -20°C to +60°C battery discharge only

    0°C to +60°C battery charge

    Below 0°C the standard internal backup battery’s ability to deliver sufficient power to operate the cellular modem is reduced.

    Below 0°C and above +60°C the internal backup battery will not be charged as a safety precaution due to dangers associated with charging batteries at extreme temperatures.

    For battery powered tracking in extreme temperatures enquire about our Remora tracker with extended temperature range battery options.


    9 pin IP67 rated connector
    Multiple harnessing options can expose power, ground, ignition, input, output, CAN and SDI-12, see the G52S user manual for details

    High sensitivity GPS
    • Supports concurrent GPS and GLONASS
    • 56 channel high sensitivity receiver
    • -161dBm industry leading tracking performance
    • Battery backed up for optimal hot-start performance
    • AssistNow Offline aiding data for fast time-to-first-fix and performance in urban canyon environments

    Low Noise GPS Amplifier

    GPS signals are boosted by a special low-noise amplifier (LNA). This allows the G52S to operate where normal units will fail to receive GPS signal.

    Cellular Communications

    The G52S can be manufactured for specific markets around the world depending on their modem requirements

    2G Modem

    Quad Band GSM/GPRS Class 10
    850 / 900 / 1800 / 1900 MHz

    3G Modem - EU
    850 / 900 / 2100
    EMEA / APAC / Latin America

    3G Modem - NA
    850 / 1900 / AWS
    North America

    3G Modem (Global Option)
    800 / 850 / 900 / AWS / 1900 / 2100
    Global coverage at a higher cost

    *enquire for other bands and LTE / 4G options


    ICASA: TA-2013/1921

    CE: Declaration of conformity with relevant test reports

    C-TICK: Declaration of conformity with relevant test reports

    Internal Antennas

    Internal GPS and cellular antennas tuned by the RF laboratories to ensure optimal performance. Having the primary antennae inside the housing makes for simple and quick installation.

    2 x Digital Inputs

    1 x ignition line with configurable pull-up / pull-down
    1 x digital input permanently pulled down (SDI-12 compatible)

    1 x Digital Output

    1 x switched ground digital output, easily wired up to switch external lights, relays, buzzers, sirens, motors and other devices.

    SDI-12 Interface

    The 5V output and digital input can be used as an SDI-12 interface, allowing the use of a variety of sensors. Commonly used sensors include: soil moisture probes, flow meters, humidity sensors.

    3 axis accelerometer

    The 3 axis accelerometer allows the G52S to detect movement and impacts. It allows the G52S to go to ‘sleep’ when not moving, resulting in extremely low standby current.

    Switched 5V Output

    The G52S can provide power to external peripherals via this 5V power line, allowing sensors and peripheral devices to be powered.
    Maximum current: 300mA


    Flash Memory

    The G52S has sufficient memory to store over 25,000 records in its flash memory. Normally the data will be sent to the server immediately but if the device is out of range then there is sufficient space to ensure that no data is lost – for many weeks of recording.

    The flash memory is also used to store parameters, GPS aiding data, firmware updates and other important information that needs to be securely stored.

  • Agriculture:

    • Soil moisture: collect data remotely via the SDI-12 interface

    • Rain gauge: connect a tipping rain gauge using the ignition input


  • Firmware Smarts

    Agriculture or Tracking Firmware

    The G52S has two distinct applications that require different firmware: Agricultural Telematics and GPS Tracking. The hardware is identical for both applications, and the firmware can be switched over the air. This following sections describe features of the firmware that apply to Agricultural Telematics, GPS Tracking, and both versions.

    General Firmware Smarts


    Auto-APN allows the G52S to analyse the SIM card and select the correct APN details from a list that is pre-loaded in the device’s firmware. This means that the G52S can be shipped world-wide without requiring specialist setup for SIMs.

    Text Message Setup

    The G52S can also be sent text messages to setup the APN, and other details.

    Multi-APN for Roaming

    The G52S can be configured to roam across multiple networks and to automatically use the different APN details for the roaming networks.

    AssistNow Offline

    The G52S will track successfully where other devices just give up.

    This fantastic technology allows the GPS to predict which satellites are in orbit above it and to dramatically reduce the time-to-first-fix of the GPS, and the overall performance of the GPS, especially in ‘urban canyon’ or forested environments.

    Deep Power Down

    The G52S will enter an extremely low power state when the battery is low (below 3.5V). This maximises the potential for the battery to be charged by the solar panel. The device will do a low power wake-up every hour to check the battery status. If the battery is charged sufficiently (above 3.5V), the device will do a full wakeup and continue with normal operation.

    Power Bands

    The G52S must work in power constrained environment. The firmware has built in power bands to adjust the behaviour according to how much power is available. The battery capacity is divided into thirds. Different behaviour can be assigned to each third. This provides a flexible setup that maximises the usefulness under different power conditions. See the user manual for more information.

    Battery Protection

    The Li-Po battery is sensitive to overcharging and charging out of the temperature specification. The charge rate is very low (1/16C). The device employs a shunt strategy to divert energy away from the battery when the battery should not be charged.

    G52S devices have been operating successfully in harsh environments for over two years.

    GPS Tracking Firmware Smarts

    Emulated Ignition

    Emulated Ignition allows the G52S to determine that a trip has started based on accelerometer and GPS data and to automatically set the ‘ignition’ input on the device to emulate the ignition line.

    This means that the G52S can be installed with the option of not wiring in the ignition line and ‘emulating’ the ignition based on movement.

    Trips are started using a configurable distance and speed threshold. Trips are ended using a configurable stationary period.

    Assumed Start Point

    Once an emulated ignition (movement) trip has started, the device will calculate a sensible start point. This give more accurate trip reproduction.

    Wired Ignition

    Use the ignition wire to start and stop trips. Accurately monitor engine run hours this way.

    Run Detect

    This setting allows the G52S to monitor the system voltage and to detect changes in the voltage that indicate if the engine is running or not.

    In Trip Time Based Logging

    Once the device has determined that a trip has started, GPS logging is done on a configurable time period. The period is configurable in each power band.

    Periodic Only Logging

    The device can be configured to ignore trips and only log on a periodic basis. For example, use this to get a GPS point every hour, regardless of movement.

    Accident Detection

    The G52S uses the built-in accelerometer to detect high G impacts such as accidents and rollovers and reports these events to the server for emergency alerting.

    Agricultural Firmware Smarts

    SDI-12 Interface

    Connect SDI-12 sensors using the 5V output, input 1, and ground connections.

    Connect up to 10 sensors with unique configurable addresses.

    SDI-12 interface is 3.3V compatible.

    Rain Gauge

    Connect a tipping rain gauge to the ignition input. The ignition input is configurable to pull up internally.

    Sensor Timing

    Configure the G52S to take readings at set intervals, aligned with the hour. For example, by default it will take SDI-12 readings every 15 min, starting on the hour.

    Upload Timing

    Schedule uploads to suit the latency requirements or data bill. Data is stored in the flash until it is uploaded.

    GPS Fix Timing

    Schedule GPS fixes as required. The default setting updates the device position once per day.


    Understand the status of the G52S with the following recorded data: battery level, external power, temperature, GSM signal strength, and solar panel input voltage
  • Documentation and Support Articles

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    Get all the latest documents and support information on our online knowledge base.

    Documents and Product Support

  • Device Management – OEM Server

    All Digital Matter devices are fully managed Over-The-Air (OTA) via our OEM Server web interface. The OEM Server seamlessly manages:

    • Device firmware – firmware updates can be done remotely
    • Network (administrator) parameters relating to critical communications
    • System parameters, including GPS parameters, IO configuration, logging options and general device behaviour settings
    • GPS AssistNow Offline aiding data files
    • Remote debugging of devices, including being able to trace data, view detailed debug message logs, and view a live trace of the server debug messages
    • Remote disconnect and reboot of devices
    • Driver list downloads to devices – this allows for the Driver Identification on the device to check if the RFID tag / username / PIN is valid, and for specific drivers to be allowed to drive / operate particular vehicles, for example based on licences or permits.
    • Geo-fence syncing with the devices – this allows the device to do advanced in-cab alerting and monitoring such as geo-fence arrival and departure, speed limit alerting, dangerous intersection warnings, turn on warning lights inside a geo-fence, and disable communications inside intrinsically safe zones such as gas plants.
    • Provides a command and message queueing platform to the devices and is incorporated into the remote management and debugging applications

    Data Connectors

    The OEM Server provides Data Connectors that forward data records on to the software platform of your choice, including Digital Matter’s own Telematics Guru platform.

    For more information on the OEM Server, click here

    If you would like to integrate the G52S into a software system then please contact Digital Matter for more information on our integration protocols.