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EquiWatt-V4000 Residential Energy Storage System, 4kW/8kWh (Floor-Standing)

The EquiWatt-V4000 is a mid-range model in Changhong’s residential energy storage integrated system series. It features a floor-standing design, with a rated output power of 4000W and a total energy capacity of 8038.4Wh (approximately 8kWh). It uses 314Ah lithium iron phosphate batteries and comes equipped with an MPPT solar charge controller (PV max. 5000W). The system supports dual-path self-charging from both the utility grid and photovoltaic sources. Its pure sine-wave output, combined with an ultra-fast UPS switchover time of ≤20ms, ensures uninterrupted power supply even during outages. With its flexible floor-standing installation, this model is ideal for medium-to-high electricity demand scenarios such as villas, self-built homes, and commercial spaces.

    description1

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    01

    Floor-standing design

    430740×250mm body size, flexible placement, suitable for villas, self-built houses, commercial spaces, and other scenarios.

    02

    8High-capacity energy storage in kWh

    Lithium iron phosphate batteries meet the basic daily electricity needs of average households.

    03

    4000W high power output

    Pure sine wave, capable of simultaneously powering mixed loads such as air conditioners, refrigerators, washing machines, and lighting.

    04

    5000W Photovoltaic Self-Charging

    PV maximum 5000W (60–500Vdc); rapid solar power charging during the day.

    05

    ≤20ms UPS switchover

    Seamless power transition from mains to battery backup, ensuring uninterrupted power supply to critical loads throughout the entire home.

    06

    RS232 communication (RJ45 interface)

    Supports local integration with inverters and EMS to enable data collection and system interconnection.

    1

    ApplicationApplication Scenarios

    6

    Villa/Custom-built house

    Combined with a photovoltaic system, it enables self-consumption during the day and battery power supply at night.
    1

    Household power supply for daily use

    TV, lighting, and refrigerator used together for approximately 5.4 hours.
    2

    Air conditioning scene

    Drives a household air conditioner for approximately 2.9 hours.
    5

    Night standby

    The low-power device provides continuous power for approximately 21.4 hours.
    3

    Backup power for small businesses

    Ensure uninterrupted power supply for cash registers, lighting, and surveillance.
    4

    Off-grid solar power supply

    Achieve household energy self-sufficiency in conjunction with photovoltaics.

    ReferenceUse time reference

    The above data were obtained by our internal laboratory under specific environmental conditions. Actual usage duration may vary depending on factors such as load type, ambient temperature, and battery condition; please refer to actual testing results for accurate information.

    Use case

    Battery life

    Nighttime standby (low-power devices such as routers and security cameras)

    Approximately 21.4 hours

    Household appliances for daily use (combined appliances such as TVs, lighting, refrigerators, etc.)

    About 5.4 hours

    Air conditioning scenario (driving high-power devices such as household air conditioners)

    Approximately 2.9 hours

    Full-load operation (4000W rated output)

    About 1.6 hours

    ParametersTechnical Parameters

    Basic parameters

    Parameter

    Specifications

    Product Model

    EquiWatt-V4000

    Product Category

    Household (Home) Integrated Energy Storage System

    Installation method

    Floor-standing

    Output power

    4000W

    Total energy

    8038.4Wh (approximately 8 kWh)

    Rated voltage

    25.6V

    Battery cell energy

    314Ah (LFP)

    Cycle life

    6000Next (95% DO)D & EOL: 80% SOH)

    Cabinet dimensions (width × height × depth)

    430×740×250mm

    Weight

    77kg

    Photovoltaic Input Parameters

    Parameter

    Specifications

    PV maximum power

    5000W

    MPPT Maximum Voltage

    500Vdc

    Maximum charging current

    100A

    MPPT voltage range

    60~500Vdc

    Communication input parameters

    Parameter

    Specifications

    Rated voltage

    230Vacuum

    Voltage range

    90~280 VAC

    Input frequency

    50/60Hz (adaptive)

    Maximum current

    120A

    Communication Output Parameters

    Parameter

    Specifications

    Rated output power

    4000VA/4000W

    Rated voltage

    230Vac±5%

    Output frequency

    50/60Hz (adaptive)

    Output waveform

    Pure sine wave

    Switching Time (UPS Switching)

    ≤20ms

    System parameters

    Parameter

    Specifications

    Communication method

    RS232 (RJ45)

    Storage temperature

    0~35℃

    Operating temperature

    -10~50℃

    Humidity

    <95% RH

    Protection rating

    IP21

    Altitude

    <2000m

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