AlphaESS is one of the most established names in home energy storage, trusted by more than 50,000 Australian households and with systems operating in 130+ countries. Their batteries are known for safe LFP chemistry, intelligent optimisation, reliable backup performance and a strong long-term track record.
With over 200,000 systems installed globally, AlphaESS has built a reputation for smart engineering, dependable hardware and cloud-based monitoring that gives homeowners complete visibility over how much energy they generate, store and use. The brand’s local Australian presence including service teams and support centres ensures fast assistance and long-term reliability.
For households looking for proven, flexible and future-ready storage, AlphaESS remains one of the most trusted choices.
| Feature | SMILE-G3-S5 Hybrid (AC/DC-Coupled) | SMILE-G3-B5 AC-Coupled | SMILE5 Additional Battery Modules |
|---|---|---|---|
| Best For | New solar + battery installs or major system upgrades | Homes with existing solar wanting to add battery storage | AlphaESS homes needing extra night-time or backup capacity |
| System Type | Hybrid system supporting AC and DC coupling | AC-coupled battery system for retrofits | Additional AlphaESS battery modules only (no new inverter) |
| Inverter Output | 5 kW single-phase hybrid inverter included | 5 kW single-phase AC-coupled inverter included | Uses the existing AlphaESS inverter |
| PV Input | Accepts new PV input (up to ~10 kWp) in DC-coupled mode | Uses existing solar inverter & panels | Depends on existing AlphaESS system; modules do not add PV input |
| Battery Capacity Options | 10.1 kWh modules (expandable) | 10.1 kWh modules (expandable) | 10.1 kWh or 15.3 kWh additional modules |
| Expandable Storage Range | ~10.1 to ~60.5 kWh (stackable) | ~10.1 to ~60.5 kWh (stackable) | 10.1 / 15.3 kWh upward, based on AlphaESS system limits |
| Backup Capability | UPS-grade essential-circuit backup | UPS-grade essential-circuit backup | Extends backup runtime when used with compatible systems |
| Key Advantages | Hybrid flexibility, STC-eligible PV, strong VPP performance | Ideal retrofit option, broad inverter compatibility | Widest expansion options, ideal for EV or high night-time usage |
| Typical Use Case | New builds or full system upgrades | Homes adding battery + backup to existing solar | AlphaESS users increasing storage capacity |
In many cases, yes. An AlphaESS home battery system supplied, configured and installed by SunEnergy can generally qualify for support under the Australian Government’s Cheaper Home Batteries Program, provided it meets the current technical and program requirements.
The program offers an upfront subsidy toward approved home battery installations, reducing your out-of-pocket cost with no reimbursement process required. SunEnergy will confirm whether your proposed AlphaESS system configuration meets the Cheaper Home Batteries Program criteria during your quote and will apply any approved subsidy directly to your installation.
A smarter, cheaper and more reliable way to power your home starts with the right battery.
AlphaESS gives you lower bills, stronger backup and better use of every ray of solar you generate.
Yes, but it depends on the model:
SMILE-G3-B5（AC-coupled） is specifically designed for homes that already have solar panels and an existing inverter.
It connects on the AC side and is compatible with all major inverter brands in Australia.
SMILE-G3-S5（Hybrid） can be installed with new solar panels or used to upgrade an older system.
It supports new PV input through its built-in hybrid inverter.
SMILE5（Additional battery only） can expand an existing AlphaESS system’s storage capacity.
Our team will check your switchboard, inverter and solar layout to confirm the best match for your home.
Yes, when it’s wired with an essential-load backup circuit, an AlphaESS home battery system can keep selected circuits running during a grid outage.
The SMILE-G3-S5 and SMILE-G3-B5 include UPS-grade backup as standard, and SMILE5 systems can provide backup when paired with a compatible AlphaESS inverter and configured for backup operation.
In practice, this means key loads such as lighting, refrigeration, internet and other agreed-essential appliances can stay on during a blackout, with backup duration depending on your battery size and how much power those loads are using.
AlphaESS offers:
10-year Product Warranty
10-year Battery Performance Warranty
The warranty begins on the installation date and applies only when the system is installed by a properly certified installer with a valid AlphaESS Installer ID, which SunEnergy provides.
Yes. all AlphaESS modules use Lithium Iron Phosphate (LFP) chemistry, the safest mainstream battery technology and include:
multi-layer BMS protection
thermal monitoring
UPS-grade backup performance
compliant installation under Australian Standards
