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Home battery · Alpha ESS · SMILE-S5 series · CEC approved March 2026
CEC listing: SMILE-S5 V (AS4777-2 2020)
A 23.94 kWh home battery. Medium home size, the 20 to 30 kWh band.
Read from the figures on this page. No review written yet.
The numbers that matter for a home. The full datasheet is below.
This warranty covers the product for 5 years, ensuring replacement or repair of faulty units. Exclusions include damages from improper installation and environmental factors.
Synergy SSL inverter pairing, VPP participation and state-rebate qualification for this battery. Rebate and STC amounts are shown in the pricing panel.
Under current WA rules, new rebate applications require VPP enrolment and CSIP-AUS compliance. How the scheme works · Estimate VPP earnings
Every figure on file for the Alpha ESS SMILE-S5, by section.
Parsed from the manufacturer datasheet, install manual, and warranty document. Confirm against the linked PDFs before relying on a value for a quote or installation.
Extracted from the installation manual
Showing 10 of 10. The official install manual is the authoritative source — always confirm before acting.
100007criticalCall your installerInsulation fault
100008criticalCall your installerGFCI fault
100025criticalCall your installerBattery over voltage
100026criticalCall your installerBattery under voltage
100038criticalCall your installerOutput DC over current
100060criticalCall your installerDSP self-check error
100005warningBus over voltage
100010warningCall your installerGrid relay fault
100027warningCall your installerBattery lose
100012infoPV reverse connection
$21,546
Estimated installed price, before rebates
Estimate, modelled from its size, Feb 2026 ratesThe WA Battery Scheme pays $1,300 on this size when it is installed with a Synergy-approved inverter and enrolled in a VPP. STCs assume about $39.9 a certificate. Estimated installed price, modelled from its size at February 2026 rates. Installer quotes vary.
Usable capacity, for one battery system
This battery is one unit in the medium home band. The WA rebate caps at 10 kWh, but that is a rebate limit, not a sizing guide.
Estimated federal rebate (STCs) for this 23.94 kWh battery
The Alpha ESS SMILE-S5 V against the closest-sized batteries from other brands.
| Specification | Alpha ESS SMILE-S5 VAlpha ESS | RoyPow 5*RBmax5.1LRoyPow | RoyPow 5*RBmax5.1L2RoyPow |
|---|---|---|---|
| Usable capacity? | 23.94 kWh | 23.95 kWhbest value | 23.95 kWhbest value |
| Continuous power? | 5 kW | Not verified | Not verified |
| Peak power? | Not verified | Not verified | Not verified |
| Round-trip efficiency? | 97%best value | 92% | 92% |
| Warranty | 5 years | Not verified | Not verified |
| Chemistry | LFP | LFP | LFP |
Specs from the CEC register and datasheet enrichment. Indicative: confirm exact figures with your installer.
Other CEC-approved products from Alpha ESS available in Australia.
Get a quote from an installer from our network that covers your area. You choose whether to act on it. No obligation.
This model is one entry in the desk's index of solar batteries for Perth: every CEC-approved battery on one comparable dataset.
Product specifications, pricing, and availability are subject to change without notice. We make no warranties regarding product performance, longevity, or suitability for your specific needs.
Always verify specifications with the manufacturer and installer before purchase. Warranty terms are set by manufacturers and may have conditions not disclosed here. Battery performance degrades over time.