| Published capacity range | 13.5 kWh |
| Scored configuration | 13.5 kWh |
| Cell chemistry | LFP (LiFePO4) |
| Usable capacity | 13.5 kWh |
| Usable energy / DoD | 100% DoD |
| Continuous power output | 11.5 kW |
| Round-trip efficiency | 89% |
| 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.
Powerwall 3 · 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 (%) | 100 | datasheet | Source |
| Modularity & scalability | Fully modular / stackable expandable | datasheet | Source |
| Energy density / footprint | Compact high-density (integrated) | datasheet | Source |
| Power & Efficiency | |||
| Round-trip efficiency (%) | 89 | stated | Source |
| Continuous power output (kW) | 11.5 | 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 | Motor-start rating published (LRA) | stated | Source |
| Longevity (verified) | |||
| Warranty throughput | Unlimited cycles for standard solar use | stated | Source |
| Warranty period (yrs) | 10 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | stated | Source |
| Verified reliability | Not independently tested | stated | No link |
| Cell balancing architecture | Active cell-level balancing (energy recirculation) | stated | No link |
| Warranty degradation guarantee | Stepped guarantee: minimum capacity at midterm + end of term | stated | Source |
| Safety & Chemistry | |||
| Cell chemistry | LFP (LiFePO4) | datasheet | Source |
| Safety certification | UL9540A + IEC62619 (thermal-runaway tested) | datasheet | Source |
| Thermal & fire mitigation | Basic | 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/tesla-tesla-powerwall-3
Powerwall 3 · continued from page 2 · Solar Analytica rubric Solar Analytica battery rubric v2.9.0.
| Guarantee & Backbone | |||
| Warranty assurance | Parts only | stated | Source |
| Financial strength & warranty backing | Financially strong (profitable / strong parent) | est. | No link |
| Manufacturing track record | 10-15 years | stated | No link |
| Energy Ecosystem | |||
| Grid-forming & backup tier | True grid-forming: black-start capable, creates AC reference, parallel source | stated | No link |
| Open protocol & API maturity | Cloud API only | est. | No link |
| VPP & grid services readiness | VPP-capable + live VPP program (named market) | est. | No link |
| EV charging integration | Smart V1G EV charging: solar surplus tracking, charge-only (OCPP 1.6/2.0.1 or | stated | No link |
| Thermal load management | No thermal load integration | est. | No link |
| Smart home & IoT depth | No local smart home integration | est. | No link |
| Firmware & security disclosure | Security page or vulnerability disclosure published | stated | Source +1 |
review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/tesla-tesla-powerwall-3