3.6kW 8kWh Residential Energy Storage System for Extended Home Backup

Longer Residential Backup for Essential Home Circuits

This residential energy storage system combines an 8kWh battery, 3.6kW pure sine wave inverter, MPPT solar charger, LCD interface and WiFi monitoring in one compact cabinet.

It provides approximately 7.2kWh of usable energy at 90% depth of discharge, offering longer backup duration than the smaller 5kWh configuration while retaining the same 3.6kW continuous output platform.

The system is designed for residential solar self-consumption and selected backup circuits, including lighting, communication equipment, refrigeration, home-office devices and security systems.

How the Residential Energy Storage System Works

Household Load Planning

Communication and Lighting

The system can support compatible routers, network equipment, mobile-device charging, LED lighting and selected home security devices.

Refrigeration and Daily Essentials

A compatible refrigerator and other selected household appliances may be included in the backup circuit after their running and startup power have been confirmed.

Home Office Equipment

Computers, monitors, routers and communication equipment can be grouped into an essential home-office backup circuit within the inverter output limit.

Entertainment and Security

Compatible televisions, CCTV equipment, alarm systems and low-power household electronics may also be supported when the combined demand remains within the rated output.

Residential Installation Specifications

Residential Solar Array Planning

The integrated MPPT charger supports photovoltaic input up to 5000W and 18A, with an operating voltage range of 40–450Vdc. Maximum photovoltaic open-circuit voltage is 500Vdc.

• Calculate the total solar string open-circuit voltage before installation.
• Allow for panel voltage increases during low-temperature conditions.
• Keep photovoltaic input current within the specified 18A limit.
• Confirm cable size, polarity, connectors and protective devices.
• Use a qualified installer for photovoltaic and household circuit configuration.

Residential Site Checklist

• Install in a dry indoor or protected technical area because the enclosure is rated IP20.
• Provide suitable ventilation and service clearance around the cabinet.
• Confirm the household voltage and frequency before ordering.
• Separate essential circuits from high-power non-backup loads.
• Check appliance startup demand before final circuit selection.
• Apply output derating when installation altitude exceeds 1000m.

Residential Energy Storage FAQ

Is the 8kWh system suitable for whole-home backup?

Whole-home suitability depends on the total continuous load and appliance startup demand. The system is generally better positioned for selected essential household circuits within the 3.6kW output limit.

How much battery energy is usable?

The system provides approximately 7.2kWh of usable energy when operated at 90% depth of discharge.

Can it support a refrigerator and home office together?

They may be supported together when their combined running power and refrigerator startup demand remain within the inverter rating and overload limits.

Does the system provide fast outage transfer?

The specified transfer time is 10ms. Compatibility should still be confirmed for equipment with strict power-continuity requirements.

Can it be installed outside the house?

The enclosure is rated IP20 and is not presented as weatherproof. It should be installed in a dry indoor or suitably protected technical location.

What information is required for quotation?

Provide the installation country, household voltage, essential-load list, solar panel specifications, required backup duration, order quantity and monitoring requirements.

Residential ESS Supply Support

This 3.6kW 8kWh residential energy storage system is suitable for solar installers, distributors, electrical contractors and project developers requiring longer backup duration for essential household circuits.

Voltertech provides household load assessment, photovoltaic matching, voltage selection, monitoring setup, installation information and project quotation support.