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SF 4000/6000 SE

On/Off-Grid Solar Inverter

The Sunflx SF 4000/6000 SE Series combines a high-frequency inverter, AC charger and MPPT solar controller for medium-sized households and rural areas with limited power. With 4kW or 6kW output and a model-specific 24V or 48V battery system, it supports dual AC outputs, PV and AC dual activation, and operation without a battery. Wi-Fi and Bluetooth monitoring enables real-time energy tracking.

24V / 48V battery system4kW / 6kW output

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2 × 22AMPPT input current

9kWMax. PV array power

120AMax. solar charge current

IP21Indoor installation

Designed for dependable supply

Key Features

MPPT Solar Charging

SF 4000 SE has one MPPT tracker; SF 6000 SE has two. Each tracker supports up to 22A input current, with up to 120A solar charging.

120–500Vdc MPPT range · 500Vdc max. PV open-circuit voltage

Flexible Battery Support

SF 4000 SE uses a 24V battery system; SF 6000 SE uses 48V. Supports lithium, lead-acid and GEL batteries.

PV and AC dual activation · Battery-free operation

Dual AC Outputs

Main and second AC outputs support smart load management for household power needs and essential-load backup.

Main output + second output

Flexible Operating Modes

Customizable operating modes suit different household energy needs. Optional feed-in to the grid provides additional flexibility.

OptionalFeed-in to the grid

Monitoring & Updates

Wi-Fi and Bluetooth monitoring supports real-time energy tracking through the available app. RS485 supports lithium battery BMS communication.

OptionalUSB one-key firmware upgrade

Built-in Dustproof Filter

A built-in dustproof filter helps protect the inverter in demanding indoor environments. Intelligent fan cooling helps dissipate heat.

IP21 · Indoor installation · 2-year warranty

Designed for homes and off-grid living.

Application Fit

Medium-sized households and essential-load backup
Off-grid and weak-grid locations
Flexible battery storage or battery-free operation
Optional feed-in to the grid

KONTAKTIEREN SIE UNS

Compare the range at a glance.

Product Specifications

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Modell	SF 4000 SE	SF 6000 SE	User-Settable
Nominal Battery Voltage	24Vdc	48Vdc
Battery Type	Lithium LiFePO4/Lead-Acid/Flooded/User Defined		√
AC INPUT
Nominal AC Input Voltage / Waveform	230Vac/Sinusoidal (Utility or Generator)
AC Input Range	90~280Vac (Appliances); 170Vac~280Vac (UPS)		√
Nominal Input Frequency	50/60Hz (Auto Detection)		√
AC Input Frequency Range	40~65±1Hz; (>42 or <63±1Hz Comeback)
Max. Bypass Current	30Amp	40Amp
Output Short Circuit Protection	Circuit Breaker
Transfer Time	10ms Typical (UPS); 20ms Typical (Appliances)
AC CHARGER
Charging Algorithm	3-Step
Max. AC Charging Current	100Amp (@V/P=230Vac)		√
Bulk Charging Voltage	29.2Vdc (AGM/Gel); 28.2Vdc (Flooded)	56.4Vdc (AGM/Gel); 58.4Vdc (Flooded)	√
Floating Charging Voltage	27Vdc	54Vdc	√
Max. Hybrid Charging Current (Solar & Utility)	120Amp		√
PV INPUT
Num.of Independent MPPT Tracker	1	2
MPPT Input Current	1*22Amp	2*22Amp
Max. PV Array Power	6000W	9000W
Max. Solar Charge Current	120Amp		√
PV Array MPPT Voltage Range	120~500Vdc
Max. PV Array Open Circuit Voltage	500Vdc
MPPT Tracking Efficiency	99.9%
INVERTER OUTPUT
Num. of Output Ports (Main & Second Output)	2
Rated Output Power of Main / Second Output	4000W/4000W	6000W/6000W
Max. Output Current of Main / Second Output	17.4A/17.4A	26.1A/26.1A
Surge Capacity	8KVA/8KW for 5 Seconds	12KVA/12KW for 5 Seconds
Output Voltage Waveform	Pure Sine Wave
Overload Protection	5s@150% Load; 10s@110%~150% Load
Output Voltage	220/230/240Vac±5%
Output Frequency	50/60Hz±1Hz
Peak Efficiency	94%
Low Voltage Cut-off Voltage	21.0Vdc	42Vdc	√
High Voltage Cut-off Voltage	33.0Vdc	63Vdc
Cold Start Voltage (When Only Connect with Battery)	23.0Vdc	46.0Vdc
No Load Power Consumption	<35W@24Vdc	<45W@48Vdc
GENERAL
Work with WIFI & BluetoothMonitoring Dongle	YES, by RS232
Work with Lithium Battery BMS	YES, by RS485
Operating Temperature Range	-10°C~50°C
Noise	≤ 60dB
Protection Degree	IP21, Indoor Only
Cooling Method	Intelligent Fan
Net Dimension (HWD)	510340120 mm
Net Weight	10 KG	11 KG
Warranty	2 Years
Certification / Standard	CE (IEC61000,IEC62109); IEC61683

Product Resources

Downloads & Support

Datasheets

SF 4000 / 6000 SE — DatasheetPDF

User Manual

SF 4000 / 6000 SE — User Manual pending

Certificate

SF 4000 / 6000 SE — Certificate pending

HD Photos

SF 6000 SE — Photo 01WEBP

SF 6000 SE — Photo 02WEBP

SF 6000 SE — Photo 03WEBP

SF 6000 SE — Photo 04WEBP

SUNFLX CLOUD APP

Work with Sunflx Cloud App

Sunflx Cloud App is a Configure and Monitor App now available in App Store and Google Play.

Work with Sunflx Smart Dongle, support both Bluetooth and Wi-Fi connection, which enables you to manage your solar device with or without an internet connection. Anytime, anywhere.