Skip to main content
SMILE-G3 BATTERY MODULES

Build battery capacity around your home.

SMILE-G3 battery modules store available solar or lower-cost grid electricity so you can use it 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.
FIND AN ALPHAESS INSTALLER
AlphaESS SMILE-G3

Choose capacity around your energy needs

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

Battery compatibility, module quantity, total system capacity and installation method vary based on the selected inverter and overall system design.

SMILE-G3-BAT-4.0S

A 4.0 kWh LFP battery module with 3.8 kWh stated usable capacity.

Its smaller capacity step provides flexibility when designing storage around modest household demand or building capacity incrementally within a compatible SMILE-G3 system.

Download Datasheet

SMILE-G3-BAT-4.8S

A 4.8 kWh LFP battery module with a 4.56 kWh stated usable capacity.

Wall-mounted and optional base installation arrangements provide flexibility when designing an appropriately sized, compatible SMILE-G3 home energy system.

Download Datasheet

SMILE-G3-BAT-9.6S

A 9.6 kWh LFP battery module with 9.3 kWh stated usable capacity.

Its larger capacity step suits compatible SMILE-G3 configurations designed for higher household electricity use, solar generation or planned energy requirements.

Download Datasheet

SMILE-G3-BAT-10.1P

A 10.1 kWh LFP battery module with a 9.6 kWh stated usable capacity.

Designed for compatible parallel configurations, it offers a higher-capacity starting point for households that need more storage in an appropriately designed system.

Download Datasheet
WHY MODULAR CAPACITY MATTERS

Capacity designed around real demand

The right battery is not necessarily the largest available. A properly sized configuration considers how much electricity your household uses, when it is used and what you want the system to achieve.

SMLE-G3 Modular design
Make more use of 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.
COMPLETE SYSTEM DESIGN

Battery capacity is only part of the decision

Battery capacity determines how much energy it can store. Inverter power affects how much electricity the system can supply at one time. A larger battery provides more stored energy, but it doesn't automatically increase the power available when several high-demand appliances run at the same time.

An authorised installer will assess both capacity and power before recommending a compatible SMILE-G3 configuration.

LEARN MORE - EXPLORE OUR HOME BATTERY STORAGE GUIDE
SAFETY BY DESIGN

Protection from cell monitoring to system control

  • LFP battery chemistry for the listed SMILE-G3 modules.
  • Battery management monitoring of cell voltage, current and temperature.
  • Product-specific aerosol safety provisions and pressure-relief features for SMILE-G3-BAT-4.8S and SMILE-G3-BAT-9.6S modules.
  • System monitoring, visibility through the AlphaESS App and commissioning by an authorised AlphaESS installer.

Installed as part of a
complete home energy system

An authorised installer must assess battery location, mounting, clearances, protection, cable routes, temperature, electrical connections and commissioning requirements. A product's IP rating does not make every indoor or outdoor location suitable.

UK support and aftercare

AlphaESS UK supports its authorised installer network with product training, technical guidance, commissioning assistance and ongoing support. This helps installers provide homeowners with a professionally designed battery system, informed installation and dependable aftercare.

FIND AN ALPHAESS INSTALLER

Connected monitoring:
The AlphaCloud App

Once commissioned, homeowners can use the AlphaESS App to view compatible battery status, system performance and configured energy flows.

Available information, settings and controls depend on the installed equipment, system configuration, connectivity and account permissions.

LEARN MORE ABOUT ALPHAESS APP

See how households are using battery storage

Explore residential installations that show how professionally designed AlphaESS systems help households store solar generation, shift electricity use and support individual home energy priorities.

Smarter home energy with SMILE-G3

Discover how an AlphaESS SMILE-G3-S8 inverter and 28.8 kWh of battery storage helped a UK household make greater use of solar generation and shift electricity use away from peak periods.

VIEW CASE STUDY
Solar PV & Battery Storage Solution for Maximum Energy Bill Savings

Cutting electricity costs through smart solar generation and battery load shifting with AlphaESS SMILE-G3-S8 inverter and 28.8kWh of battery storage.

VIEW CASE STUDY
Off-grid power backup ensuring energy supply resilience for a rural Locations

This case study explores how AlphaESS UK, in collaboration with Woodhouse Plumbing, Heating and Electrical Ltd, provided a lifeline to the homeowner through Solar PV combined with the innovative

VIEW CASE STUDY
Maximising Energy Efficiency and Resilience at Home with AlphaESS Battery Energy Storage

A 5-bedroom detached home, built in 2020 and expanded in 2021, required an advanced energy solution to enhance sustainability, cost efficiency, and resilience.

VIEW CASE STUDY
    FAQs
    How much battery capacity do I need?

    The right capacity depends on how much electricity your household uses, when it is used, available solar generation, tariff strategy, backup requirements and future plans.

    An authorised installer should review your household consumption and expected energy use before recommending a compatible configuration.

    Can I add another battery later?

    Additional capacity may be possible, but compatibility must be checked first.

    The installer will consider the inverter, battery model, existing module age and condition, permitted configuration and overall system limits before recommending an expansion.

    Can SMILE-G3 batteries be installed outdoors?

    Some listed SMILE-G3 battery modules carry an IP65 rating, but this does not make every outdoor location suitable.

    Temperature, exposure, mounting, clearances, protection and cable routes must be assessed by an authorised AlphaESS installer.

    What does usable capacity mean?

    Rated energy is the battery's stated total energy capacity. Usable capacity is the portion available within the product's operating limits and specified test conditions.

    Always compare figures from the applicable product datasheet.

    Does a larger battery always save more?

    No. The value provided by a larger battery depends on household consumption, solar generation, electricity tariffs, charging opportunities and how frequently the stored energy is used.

    Appropriate system sizing is more important than selecting the largest available battery.

    Can every G3 battery be used with every SMILE-G3 inverter?

    No. Battery compatibility, permitted module quantities, and total system capacity depend on the selected inverter, battery model and approved system configuration.

    An authorised installer must confirm compatibility before installation or expansion.

    How can I monitor my battery?

    Homeowners can use the AlphaESS App to view available battery status, system performance and energy flows.

    The information and controls available depend on the installed system, configuration, connectivity and account permissions.

    Who installs and supports the battery system?

    An authorised installer will assess the property, design the system, install the equipment and complete commissioning.

    AlphaESS UK supports its installer network with product training, technical guidance, commissioning assistance, documentation and escalation routes.

    Find the right battery
    configuration for your home

    Select battery capacity as part of your complete home energy system.

    An authorised AlphaESS installer can assess your property, electricity use, solar generation, inverter requirements, backup priorities and future plans before recommending a compatible battery configuration.

    FIND INSTALLERS
    Find an installer location pin