| Published capacity range | 8.2–60.5 kWh |
| Scored configuration | 9.6 kWh |
| Cell chemistry | LFP (LiFePO4) |
| Usable capacity | 9.6 kWh |
| Usable energy / DoD | 95% DoD |
| Continuous power output | 5 kW |
| Round-trip efficiency | 95% |
| Cycle life | 10000 cycles |
| Warranty period | 10 yr |
| Safety certification | UL9540A + IEC62619 (thermal-runaway tested) |
| Reliability testing | Not independently tested |
| Carbon footprint / EPD | Corporate ESG stated |
| Manufacturing track record | 10-15 years |
Some values are estimated where independent verification was not available: see the full scorecard and review.solar/terms.
Smile G3 S5 · every criterion scored by the live rubric (Solar Analytica battery rubric v2.9.0), with its recorded value, evidence status, and any linked source. Page 1 carries the buying-decision summary; this and the next page are the full record for verification and right of reply.
| Capacity & Usability | |||
| Usable energy / DoD (%) | 95 | datasheet | Source |
| Modularity & scalability | Fully modular / stackable expandable | datasheet | Source |
| Energy density / footprint | Average | est. | No link |
| Power & Efficiency | |||
| Round-trip efficiency (%) | 95 | est. | No link |
| Continuous power output (kW) | 5 | datasheet | Source |
| Backup switching speed | <20ms seamless relay switching (whole-home loads maintained through transition | stated | Source |
| Operating temperature range | Wide (-20 to 50C+), heat-optimised | datasheet | Source |
| Backup surge / motor-start capability | Peak/surge rating published with duration | datasheet | Source |
| Longevity (verified) | |||
| Cycle life (cycles to 70%) | 10000 | est. | No link |
| Warranty throughput | 2.5-5 MWh warranted per kWh usable | derived | Source +1 |
| Warranty period (yrs) | 10 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | stated | No link |
| Verified reliability | Not independently tested | stated | No link |
| Cell balancing architecture | Passive cell-level balancing (charge dissipation) | stated | Source |
| Warranty degradation guarantee | End-point only: minimum capacity at end of warranty term | stated | Source |
| Safety & Chemistry | |||
| Cell chemistry | LFP (LiFePO4) | datasheet | Source |
| Safety certification | UL9540A + IEC62619 (thermal-runaway tested) | stated | No link |
| Thermal & fire mitigation | Active thermal mgmt + fire suppression / cell isolation | stated | Source +1 |
| AC terminal & connection protection | Not specified | stated | No link |
| Ingress protection (outdoor) | IP65+ / IP66 outdoor-rated | datasheet | Source |
| Cell provenance & traceability | Undisclosed | stated | No link |
review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/alpha-ess-co-ltd-alphaess-smile-g3-modular-lfp-residential-e
Smile G3 S5 · continued from page 2 · Solar Analytica rubric Solar Analytica battery rubric v2.9.0.
| Guarantee & Backbone | |||
| Warranty assurance | Parts & labour | stated | No link |
| Financial strength & warranty backing | Financially strong (profitable / strong parent) | stated | No link |
| Manufacturing track record | 10-15 years | stated | No link |
| Energy Ecosystem | |||
| Grid-forming & backup tier | Whole-home backup via paired hybrid inverter (capability is inverter-dependent | datasheet | Source |
| Open protocol & API maturity | Modbus TCP + REST local + SunSpec certified | stated | Source |
| VPP & grid services readiness | Frequency ancillary services capable + live VPP program (named market) + open | est. | No link |
| EV charging integration | No EV integration | stated | Source |
| Thermal load management | No thermal load integration | est. | No link |
| Smart home & IoT depth | Community integration (Home Assistant, no native support) | stated | Source |
| Firmware & security disclosure | Firmware updates referenced; no security documentation | stated | Source +1 |
review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/alpha-ess-co-ltd-alphaess-smile-g3-modular-lfp-residential-e