Product Series: |
All in One ESS ONE SERIES |
Power Range: |
8.2KW / 10.2KW |
System Type: |
Integrated Energy Storage System |
Battery Type: |
Lithium Battery |
Application: |
Residential & Backup Power Solution |
OEM All in One ESS ONE SERIES 4.2KW 6.2KW Solar Inverter
All in one ESS ONE SERIES 4.2KW/6.2KW is a compact energy storage solution designed for residential solar applications and backup power needs. Integrating a hybrid inverter and lithium battery into one system, it offers efficient energy management, stable power output, and convenient installation. The ONE SERIES helps users optimize solar energy usage, reduce electricity costs, and maintain reliable power supply for everyday home energy demands.
Note: Please read the safety and installation manual before using the product. We reserve the right of finalinterpretation.
The specifications in this datasheet are subject to change without notice.

Features
- Pure sine wave solar inverter(on/off Grid)
- Built-in 120A MPPT Solar charge: max 6200W (for 4.2KW),max6500W(for 6.2KW)
- Output power factor 1.0
- High PV input voltage range(60~500VDC)
- WIFl&GPRS available for lOS and Android
- Built-in anti-dust kit for harsh environment
- Inverter can run without battery
- Smart battery charge design to optimize battery life
- One-key restoration to factory Settings
- Dual output
- Dual communication ports for Battery communication and Wifi communication
- Built-in Lithium battery automatic activation
Product Description
| Inverter | ||
| MODEL | ESS ONE-4.2KW | ESS ONE-6.2KW |
| Phase | 1-phase | |
| Maximum PV Input Power | 6200W | 6500W |
| Rated Output Power | 4200W / 4200VA | 6200W / 6200VA |
| Maximum Solar Charging Current | 120A | |
| Grid-Tie Operation PV Input (DC) | ||
| Nominal DC Voltage / Maximum DC Voltage | 360V / 500VDC | |
| Start-up Voltage / Initial Feeding Voltage | 60VDC / 90VDC | |
| MPPT Voltage Range | 60~450VDC | |
| Maximum Input Current | 1/18A | 1/22A |
| Grid Output (AC) | ||
| Nominal Output Voltage | 220/230/240VAC | |
| Output Voltage Range | 195~253VAC | |
| Nominal Output Current | 18.2A | 27.0A |
| Power Factor | >0.99 | |
| Efficiency | ||
| Maximum Conversion Efficiency (DC/AC) | 98% | |
| Two Load Output Power | ||
| Full Load | 4200W | 6200W |
| Maximum Main Load | 4200W | 6200W |
| Second Load Range | 840W~2940W | 1240W~4340W |
| Maximum Load Cut Off Voltage | 26VDC | 52VDC |
| Maximum Load Return Voltage | 27VDC | 54VDC |
| Off-Grid Operation AC Input | ||
| AC Start-up Voltage / Auto Restart Voltage | 120~140VAC / 180VAC | |
| Acceptable Input Voltage Range | 90~280VAC or 170~280VAC | |
| Frequency Range | 50Hz/60Hz | |
| Maximum AC Input Current | 24.7A | 36.4A |
| PV Input (DC) | ||
| Nominal DC Voltage / Maximum DC Voltage | 360V / 500VDC | |
| MPPT Voltage Range | 60~450VDC | |
| Maximum Input Current | 1/18A | 1/22A |
| Battery Mode Output (AC) | ||
| Nominal Output Voltage | 220/230/240VAC | |
| Output Wave Form | Pure Sine Wave | |
| Efficiency (DC to AC) | 94% | |
| Battery & Charger | ||
| Nominal DC Voltage | 24VDC | 48VDC |
| Maximum Solar Charging Current | 120A | |
| Maximum AC Charging Current | 100A | |
| Maximum Solar + AC Charging Current | 120A | |
| Hybrid Operation PV Input (DC) | ||
| Nominal DC Voltage / Maximum DC Voltage | 360V / 500VDC | |
| Start-up Voltage / Initial Feeding Voltage | 90VDC / 120VDC | |
| MPPT Voltage Range | 60~450VDC | |
| Maximum Input Current | 1/18A | 1/22A |
| Grid Output (AC) | ||
| Nominal Output Voltage | 220/230/240VAC | |
| Output Voltage Range | 195~253VAC | |
| Nominal Output Current | 18.2A | 27.0A |
| AC Input | ||
| AC Start-up Voltage / Auto Restart Voltage | 120~140VAC / 180VAC | |
| Acceptable Input Voltage Range | 90~280VAC or 170~280VAC | |
| Maximum AC Input Current | 24.7A | 36.4A |
| Maximum Charging Current | 100A | |
| General Physical | ||
| Dimension (H×W×D) | 205 × 530 × 400 mm | |
| Carton Dimension (H×W×D) | 280 × 600 × 470 mm | |
| Net Weight | 16 kg | 16.9 kg |
| Gross Weight | 17.5 kg | 18.4 kg |
| Interface | ||
| Communication Port | RS232 / RS485 / WiFi / GPRS / Lithium Battery | |
| Environment | ||
| Humidity | 5% ~ 95% Relative Humidity (Non-condensing) | |
| Operating Temperature | -10°C ~ 50°C | |
| Standard | ||
| Compliance Safety | CE | |
Why Choose the ONE SERIES?
Integrated All-in-One Design
The ONE SERIES integrates the solar inverter, lithium battery, BMS, and EMS into a single compact system, reducing installation complexity, saving space, and lowering maintenance costs.
Intelligent Energy Management
The built-in EMS automatically manages power flow between solar panels, battery storage, and the utility grid, maximizing solar energy utilization while reducing electricity expenses through intelligent charging and discharging.
Reliable Backup Power
During power outages, the system automatically switches to battery power within milliseconds, ensuring continuous electricity for essential household appliances and business equipment.
High Safety & Long Service Life
Equipped with premium lithium battery technology, intelligent temperature management, and comprehensive safety protection, the system delivers stable operation and an extended service life.
Applications
The OEM All in One ESS ONE SERIES is ideal for various residential and light commercial energy storage applications.
Residential Solar Energy Storage
Store excess solar energy during the day and use it at night, increasing self-consumption while reducing dependence on the utility grid and lowering electricity bills.
Backup Power for Homes
Provide uninterrupted electricity during grid outages, keeping essential appliances such as lighting, refrigerators, routers, and security systems running smoothly.
Small Commercial Buildings
Suitable for offices, retail stores, clinics, cafés, and small businesses requiring reliable backup power and energy cost optimization.
Off-Grid Solar Systems
Deliver dependable power for remote homes, cabins, farms, and locations with limited or unstable grid access by combining solar panels with battery storage.
Hybrid Solar Power Systems
Work seamlessly with both the utility grid and renewable energy sources, offering flexible energy management for modern residential and commercial applications.
System Diagram

Dimension

Back Panel Description

FAQs
1. What is the difference between the 4.2KW and 6.2KW models?
The 4.2KW model is designed for basic residential energy needs and essential appliance backup, while the 6.2KW model supports higher household power demand and more simultaneous appliance usage.
2. Is the 4.2KW system suitable for small homes or apartments?
Yes. The 4.2KW ESS system is ideal for small homes, apartments, cabins, and users with moderate daily electricity consumption.
3. Why choose a 6.2KW ESS system instead of 4.2KW?
The 6.2KW model provides higher output capacity, making it better suited for larger households or users who need longer backup time and support for more electrical devices.
4. Can both 4.2KW and 6.2KW systems store excess solar energy?
Yes. Both models are designed to store surplus solar energy during the day for nighttime use or emergency backup power.
5. Which model is more suitable for daily backup power applications?systems?
The 4.2KW system works well for essential household backup, while the 6.2KW system is more suitable for users who require more stable and continuous power support during outages.





