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12kW 20kWh All-in-One Solar ESS – 51.2V 392Ah LiFePO₄ for Large Home & Commercial Storage

Basic Properties
Place of Origin: China
Brand Name: Kingconn
Certification: IEC62109, UL1741, RoHS, FCC, EN61000
Model Number: 12KW+20KWH
Trading Properties
Minimum Order Quantity: 1
Payment Terms: T/T
Specifications
Nominal Capacity: 392Ah Rated Power: 12KVA / 12KW
AC Output: Dual Outputs (universal Gauge + Terminal Block) Communication: RS232 / RS485 / Dry Contact
LCD: Yes Cycle Life: ≥8,000 Cycles @ 80% DoD
Protection Rating: IP21 Operating Temp: -15°C To 50°C
Product Description

12kW 20kWh All-in-One Solar ESS – 51.2V 392Ah LiFePO₄ for Large Home & Commercial Storage

Dual MPPT | Dual AC Outputs | 160A Charging | 8,000 Cycles | Mobile Wheels

Part 1 – Overview & Features

Product Introduction

The ES Standard 12kW + 20kWh All-in-One Solar ESS is a high-capacity, fully integrated energy storage system combining a 12kW hybrid inverter with a 51.2V 392Ah LiFePO₄ battery (20kWh). Built for residential, commercial, and off-grid applications, this powerful unit delivers clean, reliable power for air conditioners, household appliances, lighting, and more — all from a single mobile cabinet.

With dual MPPT trackers, dual AC outputs, and a built-in LCD display, this system offers exceptional flexibility, efficiency, and ease of use. Its mobile wheeled base makes it easy to relocate, while the robust metal housing ensures durability in demanding environments.


Key Features

  • All-in-One Integrated Design – Inverter, battery, MPPT, and BMS in one cabinet.

  • 12kW Rated Output – 12KVA / 12KW, handles heavy loads with ease.

  • 20kWh LiFePO₄ Battery – 392Ah capacity for extended backup power.

  • Dual MPPT Trackers – 7500W + 7500W PV input, up to 15kW solar.

  • Dual AC Outputs – Universal gauge (3kW + 3kW) + terminal block (12kW).

  • High Charging Current – 160A PV / 120A AC / 160A max charging.

  • Pure Sine Wave Output – Clean power safe for sensitive electronics.

  • Fast Transfer Time – 10ms (PC) / 20ms (household) for uninterrupted backup.

  • Mobile Wheeled Base – Built-in universal wheels for easy relocation.

  • LCD Display – Real-time monitoring of system status and battery level.

  • Multiple Communication Ports – RS232 / RS485 / CAN / Dry Contact.

  • Intelligent BMS – Full protection against overcharge, over-discharge, overcurrent, and temperature extremes.

  • 8,000+ Cycle Life – Designed for over 10 years of reliable performance.

  • Quiet Operation – Suitable for residential and commercial environments.

Part 2 – Key Specifications (Table)

Inverter Specifications



Parameter Details
Model INV 12000
Rated Power 12KVA / 12KW
Max. PV Input Power 7500W + 7500W (15kW total)
AC Output Dual outputs (universal gauge + terminal block)
Universal Gauge Output 3KVA/3KW + 3KVA/3KW
Terminal Block Output 12KVA / 12KW
Max. AC Total Output 12KVA / 12KW
Input Voltage Range 170–280VAC (PC) / 90–280VAC (Household)
Output Voltage 220/240VAC ±5%
Output Waveform Pure Sine Wave
Transfer Time 10ms (PC) / 20ms (Household)
Peak Efficiency (PV to INV) 96%
Peak Efficiency (Battery to INV) 93%
MPPT Voltage Range 120–450Vdc
Max. PV Input Current 22.5A + 22.5A
Max. PV Charging Current 160A
Max. AC Charging Current 120A
Max. Charging Current 160A
Communication RS232 / RS485 / Dry Contact
LCD Yes

Battery Specifications



Parameter BAT 512392
Nominal Capacity 392Ah
Battery Energy 20,000Wh (20kWh)
Rated Voltage 51.2V (16S)
Discharge Cut-off Voltage 44V
Charge Cut-off Voltage 58.4V
Float Charging Voltage 56V
Continuous Charge Current 150A (adjustable)
Max. Discharge Current 200A
Rated Output Power 10,000W
Cycle Life ≥8,000 cycles @ 80% DoD
Communication RS232 / RS485 / Dry Contact
Protection Rating IP21
Operating Temp. -15°C to 50°C

Part 3 – Details & Convenience

All-in-One. Mobile. Built for Heavy Loads.

The ES Standard 12kW + 20kWh ESS is designed for maximum convenience and performance:

  • Fully Integrated Cabinet – Inverter, battery, MPPT, and BMS all in one unit. No separate components, no complex wiring.

  • Mobile Wheeled Base – Built-in universal wheels make it easy to move the unit to any location.

  • LCD Display – Clear real-time readout of battery SOC, input/output power, and system status.

  • Dual AC Outputs – Universal gauge (3kW + 3kW) and terminal block (12kW) for flexible load management.

  • Dual MPPT Trackers – Maximize solar harvest even with panels facing different orientations.

  • Multiple Charging Modes – PV, AC, or mixed charging for maximum flexibility.

  • Multiple Communication Ports – RS232, RS485, CAN, and dry contact for seamless integration.

  • Built-in BMS – Intelligent battery management for safety and longevity.

  • Quiet Operation – Suitable for residential and commercial environments.

Safety First

  • LiFePO₄ Technology – No thermal runaway, no fire risk, no toxic fumes.

  • Multi-Layer BMS Protection – Overcharge, over-discharge, overcurrent, short circuit, and temperature protection.

  • Rigorous Testing – Passed short circuit, overcharge, over-discharge, damp heat, and thermal shock tests.

  • IP21 Protection – Suitable for indoor installation.

  • Vibration & Shock Resistant – Designed for safe transport and installation.

Part 4 – Application Scenarios

Where Can You Use It?

🏠 Large Home Energy Storage
Store excess solar energy during the day and power your home at night. With 20kWh capacity and 12kW output, it can run multiple air conditioners, refrigerators, lights, and entertainment systems simultaneously.

🏢 Small to Medium Business
Keep your office, retail store, restaurant, or workshop running during outages. Protect cash registers, computers, refrigeration, and lighting with reliable backup power.

🏭 Commercial & Industrial Sites
Heavy-duty performance for warehouses, factories, and agricultural operations. The 12kW output and 20kWh capacity handle demanding loads with ease.

🌞 Off-Grid & Remote Communities
Perfect for off-grid homes, farms, or remote villages. Dual MPPT ensures maximum solar harvest even with varying panel orientations.

⚡ Solar Farm & Microgrid Projects
Integrate with large solar arrays and battery banks for community-scale renewable energy projects.

🏕️ Mobile & Temporary Power
The wheeled base makes it easy to relocate — perfect for temporary installations, events, or mobile workspaces.