Alpha ESS 40.4kWh Battery + Smile S5 G3 Hybrid Inverter Bundle (Up to 10kW PV Input)

The Alpha ESS 40.4 kWh Battery, paired with the Alpha ESS SMILE-S5 G3 5 kW Hybrid Inverter (supporting up to 10 kW PV input), delivers an extremely high-capacity residential and light commercial storage solution — ideal for large homes, off-grid capable living, farms, and energy-intensive properties.

This advanced Alpha ESS system allows you to store a huge amount of solar energy, dramatically reduce reliance on the grid, and maintain full operational continuity during power outages — while securing significant savings through Australia’s federal and state battery rebates.

Whether you are upgrading an existing solar installation or deploying a new one, this configuration helps you:

• Maximise the use of solar day and night
• Reduce electricity bills by increasing self-consumption
• Maintain critical home and business loads during outages
• Access valuable government rebate incentives

Featuring 40.4 kWh usable storage and a 5 kW hybrid inverter, this bundle provides:

• Reliable charging from up to 10 kW rooftop PV
• Smooth single-phase supply for residential circuits
• Seamless switching between solar, battery, and grid supply

This system can typically support large household energy loads — including EV charging, HVAC, pumps, refrigeration, and continuous appliances — for 30–48 hours, depending on usage patterns.

Supported by a 10-year product warranty, smart Alpha Cloud monitoring, and expert CEC-accredited installation, this system ensures maximum energy independence and exceptional lifetime savings.

🔑 Key Features

• 40.4 kWh usable capacity — Ultimate storage for high-demand homes & off-grid resilience
• 5 kW single-phase hybrid inverter — Efficient and stable residential performance
• Blackout protection — Keeps essential loads running during grid failure
• Advanced LFP (Lithium Iron Phosphate) battery chemistry — Superior safety & cycle life
• Modular + expandable — Scale storage as energy needs increase
• Smart monitoring via Alpha Cloud — Real-time system visibility and remote control
• All-weather rated — IP65 inverter suitable for outdoor installation
• Quiet operation — Low-noise performance for residential comfort
• 10-year comprehensive warranty — Full protection for battery + inverter

🏷️ About the Brand – Alpha ESS

Founded in 2012, Alpha ESS is a leading global battery storage manufacturer with systems deployed in 90+ countries.

Why Australians choose Alpha ESS:

• Local Australian service & support capability
• CEC-approved and compliant with Australian standards
• Industry-leading safety using LFP technology
• Modern design + intelligent monitoring features
• Eligible for national and state rebate programs

Alpha ESS systems are trusted for reliability, modern design and affordability.

💰 How are prices calculated?

We like to keep things simple and transparent, so you always know what you’re paying for — and what you’re saving.

Total Price = Battery Price – Federal Battery Rebate

All eligible battery systems receive a federal rebate based on usable capacity. The rebate is currently calculated as:

$350 × Usable kWh of the battery

For example, let’s say you’re looking at a battery system with 15 kWh usable capacity. The rebate would be:

$350 × 40.4 = 14,140.00 federal rebate

So if the system’s full retail price is $17,000, the displayed price on our website would be:

$24,090.00 – 14,140.00 = $9,950.00

This is the amount you’d typically pay (incl. GST) for standard installation. 

✅ No paperwork is needed — we apply the rebate upfront and handle the claim process for you.

✅ Our Online Price Includes:

• The full battery + hybrid inverter bundle
• Federal rebate already applied
• Standard installation in metro areas
• Monitoring app setup and commissioning
• Certified installation by a CEC-accredited professional
• GST included

📌 Final Quote May Vary Based On:

• Your property’s location and accessibility
• Switchboard condition or upgrade requirements
• Distance between the switchboard and the battery location
• Additional installation materials, if needed

We’ll provide a personalised quote before any work begins — no surprises, no pressure.