| Published capacity range | 13.5 kWh |
| Scored configuration | 13.5 kWh |
| Cell chemistry | Other / unspecified |
| Usable capacity | 13.5 kWh |
| Warranty period | 10 yr |
| Safety certification | UL9540 / IEC62619 |
| Reliability testing | Not independently tested |
| Manufacturing track record | 10-15 years |
Some values are estimated where independent verification was not available: see the full scorecard and review.solar/terms.
Powerwall 3 Expansion · every criterion scored by the live rubric (Solar Analytica battery rubric v2.10.0), with its recorded value, evidence status, and any linked source. Page 1 carries the buying-decision summary; this page is the full record for verification and right of reply.
| Capacity & Usability | |||
| Modularity & scalability | Fully modular / stackable expandable | datasheet | Source |
| Battery generation compatibility | Same-generation expansion only: matching spec modules required; clean path but | datasheet | Source |
| Power & Efficiency | |||
| Operating temperature range | Wide (-20 to 50C+), heat-optimised | datasheet | Source |
| Longevity (verified) | |||
| Warranty throughput | Unlimited cycles for standard solar use | datasheet | Source |
| Warranty period (yrs) | 10 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | datasheet | Source |
| Verified reliability | Not independently tested | reviewed absence | Source +1 |
| Cell balancing architecture | Pack-level only / not disclosed | reviewed absence | Source |
| Warranty degradation guarantee | End-point only: minimum capacity at end of warranty term | datasheet | Source |
| Safety & Chemistry | |||
| Cell chemistry | Other / unspecified | reviewed absence | Source +1 |
| Safety certification | UL9540 / IEC62619 | datasheet | Source |
| Thermal & fire mitigation | Basic | stated | Source |
| AC terminal & connection protection | Not specified | stated | Source |
| Ingress protection (outdoor) | IP65+ / IP66 outdoor-rated | datasheet | Source |
| Cell provenance & traceability | Undisclosed | reviewed absence | Source +1 |
| Guarantee & Backbone | |||
| Warranty assurance | Parts only | datasheet | Source |
| Financial strength & warranty backing | Financially strong (profitable / strong parent) | datasheet | Source |
| Manufacturing track record | 10-15 years | datasheet | Source |
| Energy Ecosystem | |||
| Open protocol & API maturity | Proprietary / no documented API | datasheet | Source |
| Dual-port flexibility | Fixed single function, no port flexibility or external device sync | datasheet | Source |
review.solar · audit sheet · Solar Analytica battery rubric v2.10.0 · https://review.solar/cards/tesla-powerwall-3-expansion-au