20.48kWh Stackable Whole Home Battery Bank Solar Energy Storage System

20.48kWh Stackable Home Battery Bank for Whole-Home Solar Backup Projects

More Residential Storage for Longer Backup Objectives

This 20.48kWh stackable home battery bank is designed for residential solar projects that require substantially more stored energy than a single 5.12kWh battery module. The complete configuration combines four 51.2V 100Ah LiFePO4 modules into a 51.2V 400Ah battery bank.

The larger nominal capacity can be considered for homes, villas and off-grid residences with longer backup targets or a wider group of priority circuits. Typical planning may include lighting, refrigeration, communication equipment, security systems and other selected household loads.

A 20.48kWh home battery does not automatically guarantee that every appliance in a house can operate simultaneously. The inverter output rating, motor-starting demand, battery-side current and required operating time must still be calculated for the actual project.

Why Use Four Separate Battery Modules

Calculate the Battery Bank from Daily Energy Use

Residential battery sizing should begin with the load schedule. The installer should record the average power, startup demand and required operating time of every circuit that needs backup support.

Stored energy and inverter power describe different parts of the system. The 20.48kWh rating represents nominal battery energy, while the inverter determines the available AC output power and the types of loads that can operate together.

The full nameplate capacity should not be treated as guaranteed AC energy. Inverter conversion efficiency, battery settings, operating temperature, DC cable losses and the selected discharge limits influence the energy available to household equipment.

For longer backup periods, high-consumption loads may need to be separated from essential circuits. Air conditioning, electric heating, cooking equipment and large pumps can significantly shorten the operating time of a residential battery bank.

Battery Current and Installation Planning

The connected inverter must support a nominal 51.2V lithium battery and operate within the complete 40.0–58.4Vdc battery range. Its charging configuration should also support the listed 56.0V floating-charge voltage.

The four-module battery bank supports up to 200A of continuous charging current and 400A of continuous discharge current. These values are maximum battery limits rather than required operating settings.

Module interconnection cables, inverter cables, M6 terminals, busbars, breakers, fuses and disconnect devices must be selected for the planned current. Similar cable lengths and suitable conductor sizes are important when coordinating multiple modules in one battery bank.

Each module weighs 45kg net. The complete four-module battery bank has a combined net weight of approximately 180kg, so the supporting floor and installation position must be evaluated before placement.

Whole-Home Battery Bank Specifications

20.48kWh Residential Battery FAQ

Is this one 20.48kWh battery enclosure?

No. The battery bank consists of four separate 5.12kWh modules operating as one 20.48kWh residential storage configuration.

Can this battery bank support every load in a house?

That depends on the inverter power, load schedule, startup demand and required operating time. A project-specific load calculation is required.

Does the system include a hybrid inverter?

No. This is the battery-storage section of the residential system. The inverter and DC protection equipment must be selected separately.

Can the four modules continuously discharge at 600A?

No. The continuous discharge limit is 400A. The 600A value applies only to a one-second pulse condition.

What installation space is required?

Allow space for four modules, battery cables, DC protection, ventilation clearance and maintenance access in a dry indoor technical area.

Whole-Home Backup Planning Support

Provide the household load list, required backup hours, inverter rating, charging source and available installation space to assess whether 20.48kWh is suitable for the project.