Growatt NEXA 2000 Expansion Battery – expansion battery 2 kWh for NEXA 2000

Is 2 kWh just a little too tight for your situation? With the Growatt NEXA 2000 Expansion Battery, you can easily expand the NEXA 2000 to up to 8 kWh of storage capacity. This expansion module was specially developed for the NEXA 2000 and fits in seamlessly , both technically and visually. Stack it, connect it, done – without complex wiring or additional inverters.

The NEXA 2000 expansion battery is compact, stackable and prepared for plug & play use. Ideal if you want to scale up later when consumption increases (heat pump, EV, working from home) or if you just want more autonomy in dynamic tariffs or emergency power scenarios.

Key features Growatt NEXA 2000 Expansion Battery

• Special for: Growatt NEXA 2000
• Storage capacity per module: 2 kWh
• Maximum total capacity: up to 8 kWh (NEXA 2000 + several expansion modules)
• Compact and stackable: can be neatly stacked or placed side by side
• IP66 enclosure: dust-proof and spray-proof, suitable for indoors and sheltered outdoors
• Start-up at low temperatures: works from -20 °C, so also suitable for barn, garage or unheated equipment room
• Power+ function via main unit: the available power can be adjusted via the NEXA 2000 according to consumption and configuration
• Integration with smart control: deployable in systems with Shelly Pro 3EM or Shelly 3EM for smart on/off or charging strategy
• Manufacturer number: NEXA-2000-EXPANSION-BATTERY

Dimensions and specifications

• Storage capacity: 2 kWh per module
• Height: 270 mm
• Width: 235 mm
• Depth: 406 mm
• Protection rating: IP66

When to choose a NEXA 2000 Expansion Battery?

• If 2 kWh of basic NEXA 2000 storage is too little for your consumption pattern.
• If you want more autonomy during peak hours, dynamic tariffs or possible grid failures.
• If you want to be able to scale up later to 4, 6 or 8 kWh without replacing your system.
• If you want smart control of surplus or cheap hours in combination with Shelly Pro 3EM / Shelly 3EM.

Examples of configurations

• NEXA 2000 + 1× Expansion Battery: 4 kWh total
• NEXA 2000 + 2× Expansion Battery: 6 kWh total
• NEXA 2000 + 3× Expansion Battery: 8 kWh total (maximum capacity)

Please note – this is an expansion module, not a standalone battery

The NEXA 2000 Expansion Battery does not contain its own inverter, controller or grid connection. The module:

• only works in combination with the Growatt NEXA 2000 main unit;
• cannot be separately connected to an inverter or 230 V grid;
• is controlled, monitored and monitored via the NEXA 2000.

Don’t have a NEXA 2000 yet? Then always start with the base unit and then add one or more Expansion Batteries.

Installation tips

• 1. Dry, stable surface
  Place the expansion battery on a flat, stable surface or wall bracket. Leave some space around it for ventilation and cabling.
• 2. Stack according to manual
  Stack the modules according to Growatt instructions. Use the original fittings and cable sets and follow the order indicated.
• 3. Connecting to the NEXA 2000
  Connect the extension to the main unit via the supplied DC and data cables. Check the polarity and connectors carefully – everything should be “click-free” and tight.
• 4. Configuration in the NEXA 2000
  After physical connection, the additional battery should be recognised in the NEXA 2000’s menu. Go through the installation wizard or follow the manual to set the new total capacity.
• 5. Testing
  Run the system through one or more charge/discharge cycles and check via the app whether the total kWh is displayed correctly.

Buy Growatt NEXA 2000 Expansion Battery from Radiant Green

With the Growatt NEXA 2000 Expansion Battery, your storage system simply grows with your consumption. You keep the trusted NEXA 2000 as your “brain” and only add additional storage where needed – modular, scalable and plug & play.

Are you unsure how many kWh make sense for your situation, or how best to combine NEXA with Shelly Pro 3EM, for example? Feel free to contact us. We will be happy to think with you about a practical, affordable and future-proof storage configuration for your home or project.

Datasheet User manual Installation manual App manual