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Solenso DTU SLT - User Manual

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DTU SLT User Manual

Table of Contents

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Overview

  1. Function Description
  2. Important Technical Specifications
  3. Usage Features
  4. Maintenance Features

The Solenso DTU SLT is a data transfer unit designed for monitoring and managing microinverter-based solar power systems. It acts as a communication gateway between the microinverters and a monitoring platform, enabling data upload and system control.

Function Description

The DTU SLT facilitates communication in two primary ways:

  1. Microinverter Communication: It uses a 2.4G wireless scheme to communicate with Solenso microinverters, collecting data on their performance.
  2. Monitoring Platform Communication: It employs a network cable (Ethernet) and Wi-Fi coexistence scheme to send collected data to the Solenso monitoring platform.

Key functions include:

  • Data Collection: Gathers operational data from connected microinverters.
  • Data Upload: Transmits collected data to the Solenso cloud monitoring platform.
  • Anti-current Function: Supports anti-counterflow capabilities using RS485, compatible with specific Chint electricity meters (DDSU666 100A, DTSU666 100A, DTSU666 250A). This function is primarily for grid-side applications with a default address of 001. It supports general control mode and various three-phase and crack-phase power grids (230/400V, 120/240V, 120/208V).
  • DRM (Demand Response Management): Meets DRM power dispatch requirements, specifically for Australia.
  • Network Configuration: Allows users to configure Wi-Fi or Ethernet settings for connection to the monitoring platform via a mobile application.
  • Zero Export Setting: Enables export management, anti-counter current, power grid mode selection, and electricity meter position settings.
  • Power Station Setting: Provides options for monetary unit, electricity price, advanced settings, and network settings.

Important Technical Specifications

Communication to Microinverter:

  • Type: Wireless 2.4G
  • Maximum distance (open space): 200m
  • Max. number of connected microinverter: 25

Communication to Cloud:

  • Signal: Wi-Fi (802.11b/g/n) / Ethernet

Communication to Meter:

  • Signal: RS485
  • Maximum distance (RS485 cable): 500m

Power Supply (Adapter):

  • Type: External adapter
  • Adapter input voltage/frequency: 100 to 240 V AC / 50 or 60Hz
  • Adapter output voltage/current: 5V / 2A
  • Power consumption: 2.5W (typical), 5W (maximum)

Mechanical Data:

  • Ambient temperature: -20°C to 50°C
  • Dimensions (W×H×D mm): 114×87×28.5
  • Weight: 0.20 kg
  • Installation options: Wall mounting / Desktop mounting

Features:

  • Compliance: CE

Usage Features

Physical Interfaces:

  • LED1 (Green): SLT working condition light.
  • LED2 (Green): SLT communication with the platform indicator light.
  • LED3 (Green): SLT communication with the microinverter indicator light.
  • Reset Button: Resets associated network configuration for platform communication.
  • DC 5V Input Port: For power supply.
  • RS485 Port: For anti-counterflow and remote scheduling (Sunspec Modbus protocol).
  • Ethernet Port: For wired network connection to the monitoring platform.
  • DRM Port: For Demand Response Management (Australia only).
  • AP Button: Switches between AP (Access Point) and STA (Station) modes. AP mode is used when the DTU communicates with the Solenso cloud via a WiFi router, while STA mode is used when the DTU communicates via a 4G SIM card.

Indicator Light Descriptions:

  • Start / Firmware Upgrade:
    • Three lights flash every 0.5 seconds: Machine start.
    • Three lights flash every 1 second: Firmware update.
    • Three lights flash simultaneously (0.2s on, 0.8s off): Reset success.
  • SLT Status Indicator (Green):
    • Often bright: Electrify.
    • Light flash 0.5s+0.5s: SLT Work failure.
    • Often destroyed: Unelectrified.
  • SLT and Platform Communication (Green):
    • Often bright: Connection platform is normal.
    • Light flash 0.5s+0.5s: Waiting for / trying to connect to the network.
    • Light flash slowly 1s+1s: Not connected to the monitoring platform.
    • Light flash 0.5s +1.5s: AP mode.
  • SLT and Microinverter Communication (Green):
    • Often bright: Communication is normal.
    • Light flash 0.5s+0.5s: There are microinverters not on the communication.
    • Light flash 1s+1s: All microinverters are not communicated on.
    • Light flash 1.5s: SLT unconfigured microinverter ID.

Network Configuration:

  • Wi-Fi Connection: Connect a smartphone/tablet to the DTU's built-in Wi-Fi (SSID "DTUL-XXXXXXXX", where XXXXXXXX is the last eight digits of the DTU serial number). Use the Sofia Pro installer APP to log in, navigate to "Operation and Maintenance Center" -> "Network Configuration" -> "Wi-Fi", enter network credentials, and "Send to DTU".
  • Ethernet Connection: Connect the DTU's Ethernet port to a router's LAN port. In the Sofia Pro APP, navigate to "Operation and Maintenance Center" -> "Network Configuration" -> "Ethernet", and "Send to DTU".

Monitoring System:

  • Account Application: Accounts for distributors, installers, and individuals can be obtained through the Solenso team or distributors.
  • System Requirements: Recommended browser is Google Chrome, with a screen resolution of 1920x1080 (supports 1366x768).
  • Login Address: https://monitor.solenso.net/platform/home
  • Mobile APP: Installer APP Sofia Pro is available for both iOS and Android.

Maintenance Features

  • RTC (Real-Time Clock): The DTU retains time settings for up to 7 days after a power outage. If power is restored within this period, no time reset is needed. If power is off for more than 7 days, the time will need to be reset.
  • Network Disconnection Data Storage: The device can store data for up to one week during network disconnection, ensuring data integrity even if the internet connection is temporarily lost.
  • Upload Time Interval: Data upload to the monitoring platform occurs every 15 minutes.
  • Firmware Updates: The device supports firmware updates, indicated by the three-lights flashing every 1 second during startup.
  • Installation: For optimal performance, the SLT should be installed in a cool, dry indoor location using a wall-mounted bracket, gypsum board screws, or wall anchors.
  • RS485 Connection: The RS485 cable and optional shorting jumper cable should be securely connected to the green RS485 connector using a screwdriver.
  • Antenna Suggestion: If the SLT is installed inside a metal box or under a metal/concrete roof, an extended antenna is suggested to improve signal strength.

Solenso DTU SLT Specifications

General IconGeneral
BrandSolenso
ModelDTU SLT
CategoryNetwork Hardware
LanguageEnglish