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The SMILE-G3 range redefines
home energy storage

The AlphaESS SMILE-G3 range combines compatible hybrid inverters, modular battery storage and intelligent energy management to meet different household needs. Single-phase and three-phase options are available, with system capacity selected based on the property supply, solar generation, electricity use, tariff strategy and backup priorities.

Available power, battery capacity, PV input and backup functionality vary by model and configuration. An authorised AlphaESS installer will confirm the appropriate equipment for your home.

View Inverter Range

SMILE G3 hybrid inverters bring compatible solar generation, battery storage, household demand, grid exchange and energy services together within one intelligently managed system.
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View Battery Range

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SMILE-G3 PRODUCTS

Build Your AlphaESS Home Battery Storage System

SMILE-G3 systems can be configured with compatible inverter and battery options to meet different household energy needs. Your authorised installer will assess the electrical supply, solar array, consumption, available space, tariff strategy and backup priorities before recommending a system.

Backup Gateway

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Why the SMILE-G3 stands apart

SMILE-G3 brings compatible inverter, battery, monitoring and backup options together within a professionally designed home energy system. Modular configurations allow an authorised installer to design the system around the property, household demand and future energy plans.

The SMILE-G3 delivers uninterruptible power with intelligent modular design and 24/7 monitoring. Its 10-year, 10,000-cycle warranty stands among the strongest in the market.
Rated IP65, the system works indoors or outdoors with 200% PV input capability. Off-grid operation comes standard, whether for planned use or emergency backup.
Add 10 kWh battery modules as your needs evolve, using plug-and-play installation. The building-block approach means you can expand without disrupting what already works.
INTELLIGENT

Monitor and optimise from anywhere

EXPLORE ALPHACLOUD APP

Through the AlphaESS App, powered by AlphaCloud, users of compatible SMILE-G3 systems can view energy flows, battery status, system performance and available settings. Functions vary by installed model, configuration, connectivity and account permissions.

Remote Control
Manage your battery from anywhere using the dedicated mobile application.
Smart optimisation
The system predicts demand and positions itself for maximum efficiency daily.
THE COMPLETE PACKAGE

One connected
home energy system

SMILE-G3 brings compatible solar generation, battery storage, household demand, grid exchange and backup equipment together in one professionally designed system.

Integrated system design

Compatible inverter, battery and energy management functions work together within the selected SMILE-G3 configuration.

Solar and storage management

Store available solar generation and use it around household demand and configured energy priorities.

Compatible backup options

Add backup capability using compatible AlphaESS equipment and an appropriate electrical configuration.

Tariff and EV integration

Explore compatible tariff strategies and EV charging options as part of the complete home energy system.

SCALABILITY BUILT IN

What the SMILE-G3 Range delivers

Potential independence from grid volatility and rising energy costs, protection when outages strike and the flexibility to expand as your home evolves.

Energy Independence

Generate and store your own power, reducing reliance on grid supply.

Measurable savings

Lower bills through optimised charging and strategic discharge timing.

Outage protection

Stay powered during blackouts with an automatic backup gateway as an additional feature.

Scalable growth

Expand capacity later without replacing your entire system infrastructure.
AlphaESS G3 battery range
PERFORMANCE

The numbers that matter most

The SMILE-G3 range delivers consistent performance across every metric. Round-trip efficiency reaches 94%, meaning more of your stored energy returns when you need it. A 10-year warranty covers the battery, giving you confidence in your investment.

94

Round-trip
Efficiency

10

Warranty
Coverage

10000

Cycle Lifespan
Rating

RATED 4.8 ON TRUSTPILOT

Don’t just take our word for it. See what our customers have to say about their experience with us on Trustpilot.
EXPLORE
Great System - Great Support
Had an AlphaESS solar, battery, evc system fitted. Works beautifully from day one. Had one support issue so far and was answered within 5 seconds by a human (thanks Jack) who diagnosed and solved the problem in that call, using product knowledge not a sterile script. Highly recommended.
Mr Daniel Pollick
UK Installation
Second to none - 5 Stars
We’ve been installing Alpha ESS systems for the last 12 months and have been really impressed with the products and the support behind them. The systems are straightforward to install, the commissioning process is user-friendly, and the monitoring platform is simple for customers to understand and use. From an installer’s perspective, the technical support has also been excellent whenever we’ve needed assistance...
NovaSol Energy Ltd
UK Installer
Amazing aftercare and customer support
Alpha are the best . We are renegade solar and installed over 30 solar And Battery Installations and have used alpha for the bulk of these. 1 They always answer the phone . Hugely important when trying to commision or if you have a problem. 2 they always help to resolve problems. 3 they have a vast amount of knowledge and experience. The techinal team jac joe and lewis have been fantastic for us and would like to personally say thank you for all your help and support over the years .
Ashley Merritt
UK Installer
The Little Guys Matter!
I don't normally leave reviews, but on this occasion I actually asked if I could write one because the support I've received has been exceptional. The level of customer service has been far beyond anything I expected. Every query has been answered promptly, and the team has always been knowledgeable, professional, and genuinely friendly. It's refreshing to deal with a company that takes the time to help and clearly cares about its customers. As someone relying on their support for my inverter and battery system, it's reassuring to know that whenever I've needed assistance, they've been quick to respond with clear, helpful advice.
procgen
UK Customer
I am very happy with my battery system
I am very happy with my battery system. The installation was very good and now the house is using much more energy from the solar panels. Before, a lot of energy was going back to the grid but now we can store it and use it in night. The system work very quiet and the app is very good and easy to use even for me. The tech support line has been very helpful when I had question. They answer quick and explain everything with patience. For me it is a very good investment I recommend Alpha ESS to anyone who wants to save energy and use more of their own solar power.
Luis Carlos
UK Customer

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