Alpha ESS
4.9 from 1600+ reviewsAlpha ESS SMILE5
The Alpha ESS SMILE5 is our go-to retrofit battery: AC coupling means it bolts onto any existing solar system without touching your current inverter — ideal for adding storage to older arrays.
Supplied & installed from
Federal battery discount applied at point of sale and itemised on your quote
- 15-year workmanship warranty
- 80% in-house, 20% subcontractors
- $0 deposit · 36 months interest-free
- Usable capacity
- 10.1 kWh
- Continuous power
- 5 kW
- Warranty
- 10 yrs
- Blackout backup
- Yes
Why the SMILE5
What you get with the Alpha ESS SMILE5.
AC-coupled
retrofits to any existing solar system
No inverter replacement needed
Expandable storage modules
Proven performer in Australian conditions
Full specifications
- Usable capacity
- 10.1 kWh
- Continuous power
- 5 kW
- Coupling
- AC
- Expandable
- Yes — up to 2 units
- Blackout backup
- Yes
- VPP ready
- Yes
- Warranty
- 10 years
Rebate eligibility
- Federal — Cheaper Home Batteries
- Eligible
- WA Residential Battery Scheme
- Synergy customers
The federal Cheaper Home Batteries discount applies to eligible batteries between 5 and 50 kWh and is taken off the price before you pay. We itemise the current amount on your quote rather than publish a dollar-per-kWh rate. State support depends on your retailer and property.
Check my eligibility
Get the Alpha ESS SMILE5 quoted for your home
4.9★ rating
1,600+ reviews
4x SunWiz 2026 awards
#1 Local Solar Hero, Perth South West
Tesla Premium Certified
4 consecutive years
15-year workmanship warranty
80% in-house, 20% subcontractors