AlphaESS SMILE-G3-T20 20kW Three-Phase Hybrid Battery Storage System

All-in-one ESS

Home Energy Storage – 20kW Three Phase

The AlphaESS SMILE-G3-T20 is a powerful 20kW three-phase hybrid energy storage system, designed for larger homes and high-energy applications. Combining an advanced hybrid inverter with modular LiFePO₄ battery storage, it helps maximise solar self-consumption, reduce electricity costs and provide dependable backup power when the grid goes down.

With support for up to 200% PV oversizing and three independent MPPT trackers, the SMILE-G3-T20 captures more solar energy throughout the day while optimising performance across multiple roof orientations. Its modular battery design allows storage capacity to be expanded as your energy needs increase, making it an ideal solution for properties with EV chargers, heat pumps, air conditioning or other high-demand electrical systems.

Key Features

20kW three-phase hybrid inverter designed for larger residential properties and high-energy households.

Expandable battery capacity from 3.8kWh up to 45.6kWh, allowing your energy storage system to grow as your requirements increase.

Supports up to 200% PV oversizing to maximise solar generation and improve overall system performance.

Three independent MPPT trackers optimise energy harvest from multiple roof aspects and solar arrays.

Safe LiFePO₄ battery technology provides exceptional reliability, long cycle life and enhanced thermal stability.

UPS backup with <10ms switchover helps keep essential appliances and circuits running during power outages.[/fusion_li_item][fusion_li_item]IP65-rated design suitable for both indoor and outdoor installation.[/fusion_li_item][fusion_li_item]Built-in Wi-Fi and Ethernet connectivity for straightforward commissioning and remote monitoring.[/fusion_li_item][/fusion_checklist][fusion_modal name="contact" title="Request a Call Back" size="large" show_footer="no"] [fusion_form form_post_id="3438" hide_on_mobile="small-visibility,medium-visibility,large-visibility" class="" id=""][/fusion_form] [/fusion_modal][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_builder_container admin_label="Simple Features" type="flex" hundred_percent="no" hundred_percent_height="no" hundred_percent_height_scroll="no" align_content="stretch" flex_align_items="stretch" flex_justify_content="flex-start" hundred_percent_height_center_content="yes" equal_height_columns="yes" 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link="https://passafesolutions.co.uk/wp-content/uploads/2026/07/Datasheet_EU_SMILE-G3-T20_V09.24062025_UK.pdf"]Smile-G3-T20 Datasheet[/fusion_button][/fusion_builder_column][/fusion_builder_row][/fusion_builder_container][fusion_global id="2454"][fusion_global id="2453"]