Hoymiles HiBattery 4020 Series Installation Guide

Before You Begin

Safety First

  • Read the User Manual completely before installation.
  • Installation must comply with local electrical regulations.
  • The battery is heavy — always use two people to lift and install.
  • Disconnect all power sources before making any electrical connections.
  • Do not install in areas exposed to standing water or direct sunlight.

Installation Requirements

Choose a location that is:

  • Flat and stable
  • Well ventilated
  • Protected from rain and direct sunlight
  • Within operating temperature range (-20°C to 55°C)
  • Close to required power connections
  • Easy to access for future maintenance

Installation Guide — HiBattery 4020 X

Designed for new rooftop solar systems with direct PV connection.

Step 1. Position the Battery

  • Place the HiBattery 4020 X on a solid, level surface.
  • Ensure sufficient ventilation around all sides.
  • If expansion batteries are used, stack them according to installation instructions before wiring.

Step 2. Connect Expansion Batteries (Optional)

  • Power must remain OFF.
  • Remove connector covers.
  • Carefully stack each battery module.
  • Secure the battery connection according to the locking mechanism.

The system supports expansion from 4.02 kWh up to 16.08 kWh.

Step 3. Connect PV Modules

Connect the solar panels directly to the four integrated MPPT inputs.

  • Verify PV voltage is within specification.
  • Connect MC4 positive and negative connectors securely.
  • Confirm correct polarity before energizing.

Step 4. Connect AC Output

Connect the AC output cable to the household electrical system according to local electrical codes.

  • Ground connection is completed.
  • Circuit breaker is installed.
  • AC wiring is securely fastened.

Step 5. Install Energy Meter (Recommended)

Install a compatible smart meter for:

  • Automatic charging
  • Self-consumption optimization
  • Export limitation
  • Backup power management

Related product: Hoymiles Smart Meter, 3 Phases

Step 6. Power On

  1. Turn on the battery.
  2. Switch on the AC breaker.
  3. Enable PV input.
  4. Verify LED indicators show normal operation.

Step 7. Configure in S-Miles Home

  • Connect via Bluetooth
  • Configure Wi-Fi
  • Add the battery
  • Pair the smart meter
  • Check firmware updates
  • Confirm normal charging and discharging

LED Status Check

LED Status Meaning
Solid Green Normal operation
Flashing Green Starting up or communicating
Solid Red Fault detected
No Light Power off or no input

Installation Differences

Feature HiBattery 4020 X HiBattery 4020 AC
Best for New solar installations Existing solar systems
PV connection Direct connection to PV panels (4 MPPT inputs) No direct PV connection
Built-in inverter Yes Yes
AC connection Required Required
Smart meter Recommended Recommended
Expandable Up to 16.08 kWh Up to 16.08 kWh
Typical installation time About 1 minute after positioning and wiring About 1 minute after positioning and wiring