3.6kW 5kWh Residential Energy Storage System for Solar Backup Power

Residential Solar Storage for Essential Home Loads

This residential energy storage system combines a 3.6kW pure sine wave inverter, 5kWh battery, MPPT solar charger, LCD display and WiFi monitoring within one compact cabinet.

It provides 5kWh of rated energy and approximately 4.5kWh of usable energy at 90% depth of discharge. The stored energy can support selected household loads when solar generation is low or grid power is temporarily unavailable.

The system is suitable for residential solar self-consumption, essential-load backup and home energy projects requiring an integrated inverter and battery solution.

How the Home Energy System Can Be Used

Store Daytime Solar Energy

Compatible photovoltaic panels can charge the battery during the day, allowing stored solar energy to be used when household demand continues after solar production decreases.

Support Essential Loads During Outages

The 3.6kW inverter can supply compatible lighting, routers, televisions, computers, refrigerators and other selected household equipment during temporary grid interruptions.

Improve Solar Self-Consumption

Instead of using all solar energy immediately, homeowners can store part of the daytime generation for later household use and reduce direct grid consumption.

Provide Fast Backup Transfer

A specified 10ms transfer time supports fast switching for compatible essential circuits. Equipment with strict continuity requirements should still be checked before installation.

Home Backup Time Reference

The system provides approximately 4.5kWh of usable energy at 90% depth of discharge. Actual operating time depends on load power, inverter efficiency, battery condition and operating temperature.

The values above are planning estimates and are not guaranteed operating times.

Residential ESS Technical Specifications

Home Solar Array Planning

The MPPT solar charger supports up to 5000W photovoltaic input and operates within a 40–450Vdc range. Maximum photovoltaic open-circuit voltage is 500Vdc.

• Calculate the photovoltaic string voltage using the panel open-circuit voltage.
• Allow for voltage changes caused by low outdoor temperatures.
• Keep the total photovoltaic input current within the 18A limit.
• Confirm cable size, connector type, polarity and protective devices.
• Solar array design should be completed by a qualified installer.

Residential Installation Checklist

• Install in a dry indoor or protected technical area because the enclosure is rated IP20.
• Provide suitable ventilation and clearance for operation and maintenance.
• Confirm household AC voltage, grid frequency and wiring arrangement.
• Separate essential backup circuits from loads that exceed the inverter rating.
• Check the starting demand of refrigerators, pumps and air-conditioning equipment.
• Apply output derating when the installation altitude exceeds 1000m.

Residential Energy Storage FAQ

Can this system provide whole-home backup?

It is primarily intended for selected essential household circuits. Whole-home suitability depends on total continuous load, appliance startup power and the required backup duration.

How much battery energy can the homeowner use?

The system has 5kWh rated energy and approximately 4.5kWh usable energy when configured for 90% depth of discharge.

Can it run a refrigerator during an outage?

Many household refrigerators may be compatible, but the compressor startup power must be checked together with the power demand of all other connected loads.

Can the system be monitored remotely?

Yes. The product supports an LCD interface, USB communication and WiFi monitoring for checking operating information and system status.

Is it suitable for outdoor installation?

The enclosure is rated IP20 and is not presented as a weatherproof outdoor product. Install it in a dry indoor or protected technical area.

What information is needed for a residential project quotation?

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

Residential ESS Supply Support

This 3.6kW 5kWh residential energy storage system is suitable for solar installers, energy storage distributors, electrical contractors and project developers serving home solar markets.

Voltertech provides household load assessment, photovoltaic array matching, voltage selection, monitoring configuration, installation data and quotation support.