Skip to main content

Build battery capacity around the home.

SMILE G3 battery modules store available solar or lower-cost grid electricity so it can be used around your household needs, tariff strategy and configured energy priorities.
An authorised installer will assess consumption, generation, available space, compatible equipment and backup requirements before recommending the appropriate capacity and configuration.
AlphaESS Dual-System Backup Gateway unit

Choose capacity around your energy needs

AlphaESS G3 battery modules can be configured around different household energy requirements. Your authorised installer will assess electricity use, solar generation, tariff strategy, available space and compatible system equipment before recommending a battery arrangement.

The capacity available, number of modules and expansion options depend on the selected inverter and complete system design.

SMILE-G3-S3.6 and S5

Single-phase hybrid inverter options for homes requiring 3.68 kW or 5 kW nominal output. Suitable configurations can combine solar, modular G3 batteries, monitoring and an approved backup arrangement.

Download Datasheet

SMILE-G3-S8

An 8 kW single-phase option developed for homes with higher power requirements. System capacity, grid connection and backup design must be checked for the property.

Download Datasheet

SMILE-G3-T10 and T20

Three-phase hybrid inverter options for larger homes and projects requiring 10 kW or 20 kW nominal output. Battery configuration and available power depend on the complete approved system design.

Download Datasheet
WHY MODULAR CAPACITY MATTERS

Capacity designed around real demand

STORION H30/H50 G3 cabinet
Use more generated energy
Store available solar that might otherwise be exported
Shift electricity use
Charge at selected times and use stored energy when grid prices are higher, subject to tariff and system settings.
Plan for changing demand
An approved modular design can provide a route for future expansion where the selected product, age, condition and configuration permit it.
How much capacity do I need?
There is no single household answer. Good sizing considers half-hourly or daily consumption, solar generation, seasonal use, tariff strategy, high-load appliances, EV charging, backup expectations and budget. Oversizing can add cost without creating proportional value.

Installed as part of a complete system

Battery location, mounting, clearances, protection, cable routes, temperature, network connection and commissioning must be assessed by a competent approved installer. The product's IP rating does not remove the need for a suitable site.

Once commissioned, homeowners can use the AlphaESS App to view system performance and configured energy flows. AlphaCloud access and available functions depend on the system, account type and approved support route.

iOS

Design battery storage around your home

Battery capacity should be selected as part of the complete home energy system. An authorised AlphaESS installer can assess your property, electricity use, solar generation and future plans before recommending a compatible configuration.
FIND AN ALPHAESS INSTALLER
FAQs
How does home battery storage work?
A home battery stores electricity for use when you need it. It can store surplus energy generated by solar panels or electricity taken from the grid during lower-cost periods. The stored energy can then power your home when electricity prices are higher, when solar generation is low or, with the appropriate backup equipment, during a power cut.
Do I need solar panels to install a home battery?
No. A home battery can be installed with or without solar panels. A standalone battery can charge from the grid, allowing you to make greater use of lower-cost electricity tariffs. When combined with solar panels, it can store surplus solar energy that might otherwise be exported to the grid.
Can battery storage be added to an existing solar system?
In many cases, yes. The most suitable arrangement will depend on your existing solar system, inverter, electricity usage and the battery being installed. An approved installer can assess your current setup and recommend a compatible solution.
What size home battery do I need?
The right battery capacity depends on how much electricity your household uses, when you use it, whether you have solar panels and what you want the system to achieve. Your installer should review your electricity consumption and future requirements, including electric vehicle charging or heat pump use, before recommending a system.
Will my battery power my home during a power cut?

Yes. AlphaESS offers a Backup Gateway that can keep your home powered if the electricity supply is interrupted. The available backup time will depend on your battery’s charge level, capacity and household electricity use. Your AlphaESS installer can recommend the appropriate system configuration for your home.

Will my battery power my home during a power cut?

Yes. AlphaESS offers a Backup Gateway that can keep your home powered if the electricity supply is interrupted. The available backup time will depend on your battery’s charge level, capacity and household electricity use. Your AlphaESS installer can recommend the appropriate system configuration for your home.

Will my battery power my home during a power cut?

Yes. AlphaESS offers a Backup Gateway that can keep your home powered if the electricity supply is interrupted. The available backup time will depend on your battery’s charge level, capacity and household electricity use. Your AlphaESS installer can recommend the appropriate system configuration for your home.

Will my battery power my home during a power cut?

Yes. AlphaESS offers a Backup Gateway that can keep your home powered if the electricity supply is interrupted. The available backup time will depend on your battery’s charge level, capacity and household electricity use. Your AlphaESS installer can recommend the appropriate system configuration for your home.

Will my battery power my home during a power cut?

Yes. AlphaESS offers a Backup Gateway that can keep your home powered if the electricity supply is interrupted. The available backup time will depend on your battery’s charge level, capacity and household electricity use. Your AlphaESS installer can recommend the appropriate system configuration for your home.

Is home battery storage safe?

Home battery systems are designed with multiple layers of protection, including battery monitoring and safety controls. Safe performance also depends on correct product selection, positioning, installation and commissioning. Always use an appropriately qualified installer and follow the manufacturer’s operating and maintenance guidance.

Find an authorised installer

All AlphaESS UK Authorised Installers are trained and certified to carry installations across our product range. You can search for an installer who covers where you live and receive quotations based on your system requirements.
SEARCH INSTALLERS IN YOUR AREA
Find an installer location pin