Grid-Tied Inverter Single-Phase F-G2 Series(3kW-6kW)

FoxESS F-G2 3kW-6kW Single-Phase Grid-Tied Inverter

The FoxESS F-G2 Series is a 3kW-6kW single-phase grid-tied solar inverter designed for residential and small commercial photovoltaic systems. The series combines dual MPPT tracking, a wide PV operating voltage range, IP65 protection and remote monitoring in a compact wall-mounted design.

With up to 97.4% maximum efficiency and 99% MPPT efficiency, the F-G2 Series converts DC power from photovoltaic modules into grid-compatible single-phase AC power while independently managing two PV strings through two MPP trackers.

The inverter supports up to 600V maximum PV input voltage, an 80-550V MPPT operating range and 14A maximum input current per MPPT. FoxCloud monitoring and optional WiFi, GPRS or 4G communication support remote system supervision for installers, distributors and system operators.

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F-G2 Series Key Specifications

F-G2 3kW-6kW Model Range

The F-G2 platform covers multiple output levels for residential and small commercial PV system sizing. Available configurations include F3000-G2, F3600-G2, F4600-G2, F5000-G2, F5300-G2 and F6000-G2.

Dual MPPT for Two Independent PV Strings

Each F-G2 inverter is equipped with two independent MPP trackers and supports one PV string on each MPPT. This allows two module strings with different roof orientations, tilt angles or irradiance conditions to be tracked independently.

The maximum input current is 14A per MPPT and the maximum short-circuit current is 18A per MPPT. PV module Isc and operating current should therefore be checked carefully during system design, especially when using modern high-current solar modules.

600V PV Input and 80-550V MPPT Range

The F-G2 Series supports a maximum PV input voltage of 600V and operates across an MPPT voltage range of 80V to 550V. The rated input voltage is 360V.

The minimum PV input voltage is 80V, while the specified inverter start-up voltage is 120V. These two values should not be treated as the same specification when calculating PV string length.

Installers should calculate cold-temperature open-circuit voltage, operating string voltage and module current before finalizing a PV array configuration.

Up to 97.4% Maximum Conversion Efficiency

The F-G2 Series provides up to 97.4% maximum inverter efficiency, 96.8% European efficiency and 99% MPPT efficiency.

Total harmonic current distortion is specified below 3%, while the power factor can be adjusted from 0.8 leading to 0.8 lagging where permitted by the applicable grid configuration.

IP65 Protection for Indoor and Outdoor Installation

The inverter enclosure is rated IP65 and is designed for suitable indoor or outdoor installation according to the installation manual and local electrical requirements.

The specified operating-temperature range is -25°C to +60°C, with relative humidity from 0 to 100% non-condensing and a maximum operating altitude of 3000m.

Natural Cooling and Low-Noise Operation

Natural-convection cooling eliminates the need for an internal cooling fan during normal operation. Typical noise emission is specified below 30dB.

This makes the F-G2 Series suitable for residential and light-commercial applications where inverter placement and operating noise are important installation considerations.

Electrical Protection Functions

The F-G2 Series includes insulation monitoring, residual-current monitoring, DC reverse-polarity protection, anti-islanding protection, AC short-circuit protection, AC overcurrent protection and AC overvoltage protection.

DC and AC Type II surge protection, a DC switch and AFCI are available as optional configurations according to the applicable product version and market.

System designers should verify the exact inverter configuration and local grid requirements before specifying optional protection equipment.

FoxCloud Remote Monitoring

The F-G2 Series supports remote photovoltaic system monitoring through the FoxESS monitoring platform using a smartphone app or web portal.

Optional WiFi, GPRS or 4G monitoring modules are available. Communication interfaces include RS485, Meter / CT and DRM, depending on the system configuration and regional requirements.

Remote monitoring allows system operators and installers to review system performance, operating data and inverter status without relying exclusively on on-site inspections.

Battery Storage Upgrade with FoxESS Charge Controller

The F-G2 Series is a grid-tied PV inverter rather than a conventional hybrid inverter with a direct battery connection.

FoxESS describes the F-G2 platform as battery ready for future storage upgrades when paired with a compatible FoxESS charge controller. Battery-system design, compatible equipment and operating functions should be confirmed for the specific project before installation.

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Compact Wall-Mounted Design

The current F-G2 product specification lists dimensions of 402 × 453 × 148mm and a weight of approximately 14.8kg.

Its compact wall-mounted format supports residential utility rooms, garages, exterior walls and suitable small commercial PV installations where installation space is limited.

Applications for the FoxESS F-G2 Series

Residential Rooftop Solar Systems

The 3kW-6kW output range is suitable for many single-phase residential photovoltaic systems where system capacity, local grid limits and household electrical requirements are compatible.

Small Commercial PV Systems

The higher-power F-G2 models can also be evaluated for small shops, offices and other light-commercial buildings using single-phase grid connections.

Roofs with Two Different Orientations

Dual MPPT tracking is useful where PV arrays are divided between two orientations or tilt angles, allowing each string to operate independently within the inverter's electrical limits.

Selecting PV Modules for the F-G2 Inverter

PV module selection should be based on voltage and current compatibility rather than module wattage alone.

The module string open-circuit voltage must remain below the inverter's maximum DC input voltage under the lowest expected site temperature. Operating string voltage should remain within the 80-550V MPPT window.

Module operating current and short-circuit current must also remain within the applicable 14A maximum input-current and 18A short-circuit-current limits per MPPT.

Grid Compliance and Project Configuration

Published F-G2 specifications reference EN/IEC 62109-1/2 safety requirements, EN 61000-6-1/2/3/4 EMC standards and grid regulations including AS/NZS 4777.2 and CEI 0-21 for applicable configurations.

Certification and grid-code requirements vary by country and model version. Distributors, installers and EPC contractors should confirm the exact model and required regional approvals before procurement.

5-Year Product Warranty

The current Ocean Solar product listing specifies a 5-year product warranty for the F-G2 Series.

Warranty terms, coverage and regional conditions should be confirmed with the commercial quotation and applicable warranty documentation before ordering.

For Solar Distributors, Installers and EPC Contractors

The F-G2 Series is suitable for professional procurement of single-phase grid-connected photovoltaic systems. Buyers should specify the required inverter model, destination country, grid voltage, PV module specification and monitoring requirements when requesting a quotation.

For projects that may require battery storage later, the compatible FoxESS charge controller and battery-system configuration should be evaluated during system planning rather than assuming a direct battery connection to the F-G2 inverter.

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Frequently Asked Questions About FoxESS F-G2 Inverters

What power ratings are available in the FoxESS F-G2 Series?

The F-G2 family covers single-phase inverter ratings from 3kW to 6kW, including F3000-G2, F3600-G2, F4600-G2, F5000-G2, F5300-G2 and F6000-G2 configurations.

Does the F-G2 inverter have two MPPT trackers?

Yes. The F-G2 Series has two independent MPP trackers with one PV string per MPPT.

What is the F-G2 start-up voltage?

The specified start-up input voltage is 120V. The 80V value refers to the minimum PV input voltage and lower end of the MPPT operating range.

What is the MPPT voltage range?

The published MPPT operating voltage range is 80V to 550V, with a rated DC input voltage of 360V.

What is the maximum PV input voltage?

The maximum PV input voltage is 600V. Actual string length must also account for module Voc and cold-temperature voltage increase.

What is the maximum PV input current per MPPT?

Maximum input current is 14A per MPPT and maximum short-circuit current is 18A per MPPT.

What is the maximum inverter efficiency?

Maximum efficiency is 97.4%, European efficiency is 96.8% and MPPT efficiency is 99%.

Can the FoxESS F-G2 be installed outdoors?

The inverter has an IP65 enclosure rating and is designed for suitable outdoor installation when installed in accordance with the applicable installation instructions and local requirements.

How noisy is the F-G2 inverter?

The inverter uses natural-convection cooling and has a published typical noise level below 30dB.

Does the F-G2 support remote monitoring?

Yes. The F-G2 supports remote monitoring through the FoxESS monitoring platform, with optional WiFi, GPRS or 4G communication modules.

Can the F-G2 connect directly to a battery?

The F-G2 is a grid-tied PV inverter and should not be treated as a standard hybrid inverter with a direct battery port. FoxESS specifies that the series can be upgraded for battery storage when paired with a compatible FoxESS charge controller.

What protection functions are included?

Standard protection functions include insulation monitoring, residual-current monitoring, DC reverse-polarity protection, anti-islanding protection, AC short-circuit protection, AC overcurrent protection and AC overvoltage protection. Other protection options depend on the selected configuration.

What are the dimensions and weight?

The current product specification lists dimensions of 402 × 453 × 148mm and a weight of approximately 14.8kg.

What information should I provide when requesting an inverter quotation?

Provide the required inverter power, destination country, grid voltage and frequency, PV module model, module quantity or string configuration, and any monitoring or storage-upgrade requirements.

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