The GoodWe ESA G21 GW5.1-BAT-D-G21 is a next-generation 5.12kWh lithium iron phosphate (LFP) battery module designed specifically for GoodWe ESA G21 hybrid inverter systems. Built for modern residential and small commercial solar energy storage applications, this advanced battery module delivers reliable performance, flexible scalability, and long-term durability.

Its stackable modular design allows multiple battery units to be combined, enabling homeowners and installers to easily expand storage capacity as energy requirements grow. Engineered with low self-discharge technology and advanced LFP chemistry, the ESA G21 battery module provides excellent safety, long cycle life, and dependable daily energy storage performance. 

The battery features an IP65-rated enclosure, making it suitable for indoor or sheltered outdoor installations while offering strong protection against dust and moisture. 

Key Features

• Brand: GoodWe
• Model: ESA G21 GW5.1-BAT-D-G21
• Battery Capacity: 5.12kWh
• Battery Type: Lithium Iron Phosphate (LFP / LiFePO4)
• Stackable modular battery design
• Compatible with GoodWe ESA G21 hybrid inverters
• Expandable energy storage system
• Low self-discharge design
• Long cycle life and enhanced safety
• IP65-rated protection
• Suitable for indoor or sheltered outdoor installation

Performance & Energy Storage

• Stores excess solar energy for later use
• Helps maximise solar self-consumption
• Reduces grid electricity dependence
• Reliable daily charging and discharging performance
• Designed for long-term energy storage applications
• Stable power delivery for hybrid solar systems

The LFP battery chemistry offers excellent thermal stability, improved safety, and long operational lifespan compared to traditional battery technologies. 

Modular & Expandable Design

• Stackable architecture for flexible system expansion
• Multiple battery modules can be combined for larger storage systems
• Easy future upgrades without replacing the entire system
• Ideal for growing residential energy demands

The modular ESA platform allows flexible system sizing depending on household or commercial energy usage requirements. 

Technical Specifications

Battery

• Rated Energy: 5.12kWh
• Usable Energy: 5kWh
• Battery Chemistry: LFP (LiFePO4)
• Communication: CAN
• Low self-discharge design

Environmental

• Protection Rating: IP65
• Operating Temperature:
  • Charge: +2°C to +55°C
  • Discharge: -20°C to +55°C
• Maximum Operating Altitude: 4000m
• Noise Emission: ≤29dB

Dimensions & Weight

• Dimensions:
  • 800 × 326 × 270 mm
• Weight:
  • Approx. 57.5 kg

Compatibility

Compatible with:

• GoodWe ESA G21 Hybrid Inverters
• GoodWe ESA Residential Energy Storage Systems

Ideal for:

• Residential solar battery systems
• Hybrid solar + battery installations
• Backup power solutions
• Smart home energy management systems