The Fronius IG Plus 35 V-1 is a single-phase grid-connected photovoltaic inverter designed to convert direct current (DC) produced by photovoltaic modules into alternating current (AC) synchronized with a 230V single-phase electrical grid.
The model identified by code 4.210.015 features, according to the specified configuration, a power rating of 3150W and apparent power up to 3500VA. It belongs to the professional IG Plus series, developed by Fronius for grid-connected photovoltaic systems.
Unlike Transformerless inverters, the Fronius IG Plus family uses a high-frequency (HF) transformer topology. The system integrates Maximum Power Point Tracking (MPPT), with an MPP tracking efficiency declared above 99.9% in the technical documentation of the series. The IG Plus 35 V-1 model is associated with 1 MPPT.
The inverter features a front LCD display for viewing production data, operating parameters, system status and any error codes. Cooling is active and regulated, while the integrated DC disconnect switch facilitates isolation of the photovoltaic array.
⚙️ Main Features
Single-Phase Grid-Connected Photovoltaic Inverter
Specified Power: 3150W
Apparent Power: 3500VA
Grid Voltage: 230V AC
Number of MPPTs: 1 MPPT
Integrated MPPT System
HF Transformer Topology
Front LCD Display
Operating Parameter Monitoring
Diagnostics and Error Display
Regulated Active Cooling
Integrated DC Disconnect Switch
Indoor / Outdoor Installation According to Technical Requirements
Protection Rating of the European IG Plus V Family: IP54
📋 Technical Specifications
Brand: Fronius
Series: IG Plus
Model: IG Plus 35 V-1
Product Code: 4.210.015
Type: Grid-Connected Photovoltaic Inverter
Grid Configuration: Single-Phase
Specified Power: 3150W
Maximum Specified Apparent Power: 3500VA
Nominal AC Voltage: 230V AC
Nominal Frequency: 50Hz / 60Hz Depending on Grid Configuration
Number of MPPTs: 1 MPPT
MPP Voltage Range: 230–500V DC
Maximum DC Voltage: 600V DC
Maximum DC Current: 16.1A
Maximum Efficiency: 95.7%
European Efficiency: 95.0%
MPP Tracking Efficiency: >99.9%
Topology: High-Frequency HF Transformer
Cooling: Regulated Active Ventilation
Protection Rating: IP54
Operating Ambient Temperature: -20°C to +55°C
User Interface: Front LCD Display
DC Disconnect Switch: Integrated
The main electrical values listed above are consistent with the technical datasheet of the European Fronius IG Plus V series and with technical sources specific to the 35 V-1.
🔧 Integrated Functions
The inverter is designed to automatically manage photovoltaic energy conversion and synchronization with the electrical grid.
Main Functions:
Automatic Maximum Power Point Tracking (MPPT)
DC/AC Conversion
Automatic Grid Synchronization
AC Voltage and Frequency Monitoring
DC-Side Parameter Control
DC Insulation Measurement
Automatic Operating Point Management
Power Limitation Under Overload Conditions
Temperature Monitoring
Data Visualization via LCD Display
Error Logging and Display
Integrated DC Isolation
⚠️ Possible Errors and Faults
The Fronius IG Plus 35 V-1 can display status codes and faults related to electrical, thermal or internal inverter conditions.
Main Possible Error Categories:
AC Grid Voltage Error – Voltage Outside Permitted Limits
Grid Frequency Error – Frequency Outside the Operating Window
DC Voltage Too High – Photovoltaic Input Above Permitted Limits
Insufficient DC Voltage – PV Energy Insufficient for Start-Up
DC Insulation Error – Possible Leakage to Ground in the Photovoltaic Array
Inverter Overtemperature – Excessive Internal Temperature
Ventilation System Error – Possible Cooling Fault
Internal Communication Error – Problem Between Electronic Modules
Grid Error / Synchronization Failure – Unable to Connect Correctly to the Grid
Automatic Power Reduction – Derating Due to Temperature or Operating Conditions
Internal Power Electronics Error – Fault in the Conversion Section
Permanent Fault / State Code – Condition That May Require Technical Diagnosis
Note: Specific numerical codes must be matched to the manual of the exact variant and national configuration, avoiding attribution of unverified codes to the individual unit.
🔌 Compatibility
Compatible, subject to technical verification of the electrical parameters, with:
Residential Photovoltaic Systems
230V Single-Phase Systems
Grid-Tie Photovoltaic Installations
PV Strings Compatible with the MPPT Range
DC Configurations Within the Maximum Permitted Limit
Existing Systems with Fronius IG Plus Inverters
Retrofit Applications
Replacement of Compatible Equivalent Inverters
🏭 Applications
Ideal for:
Domestic Solar Installations
Single-Phase Photovoltaic Systems
Residential PV Systems
Retrofit of Existing Photovoltaic Installations
Replacement of Compatible Fronius Inverters
Systems with 230–500V DC MPP Voltage
Compatible Indoor and Outdoor Technical Applications
🌟 Advantages
1 Integrated MPPT
Maximum Efficiency up to 95.7%
MPPT Efficiency >99.9%
Integrated HF Transformer
LCD Display for Monitoring and Diagnostics
Regulated Active Cooling
Integrated DC Disconnect Switch
IP54 Protection
Robust Professional Construction
Suitable for Retrofit of Existing Photovoltaic Installations
Proven Fronius IG Plus Platform
📦 Product Condition
Used Inverter
Cosmetic Condition to Be Verified According to the Photographs of the Individual Unit
Possible Normal Signs and Traces of Use
Operation Should Be Declared as Tested Only After an Actual Technical Test
Electrical Compatibility Must Be Checked Before Installation