| Published capacity range | 12 kWh |
| Scored configuration | 12 kWh |
| Cell chemistry | LFP (LiFePO4) |
| Usable capacity | 12 kWh |
| Usable energy / DoD | 100% DoD |
| Round-trip efficiency | 96% |
| Warranty period | 10 yr |
| Safety certification | Basic cert |
| Reliability testing | Not independently tested |
Some values are estimated where independent verification was not available: see the full scorecard and review.solar/terms.
Battery-Box Premium HVL · 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 page is 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 |
| Power & Efficiency | |||
| Round-trip efficiency (%) | 96 | datasheet | Source |
| Operating temperature range | Standard | datasheet | Source |
| Backup surge / motor-start capability | Peak/surge rating published with duration | datasheet | Source |
| Longevity (verified) | |||
| Warranty throughput | 2.5-5 MWh warranted per kWh usable | datasheet | Source |
| Warranty period (yrs) | 10 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | datasheet | Source |
| Verified reliability | Not independently tested | reviewed absence | Source +2 |
| Warranty degradation guarantee | End-point only: minimum capacity at end of warranty term | datasheet | Source |
| Safety & Chemistry | |||
| Cell chemistry | LFP (LiFePO4) | datasheet | Source |
| Safety certification | Basic cert | datasheet | Source |
| Thermal & fire mitigation | Passive thermal mgmt | reviewed absence | Source |
| Guarantee & Backbone | |||
| Warranty assurance | Parts only | datasheet | Source |
| Energy Ecosystem | |||
| Grid-forming & backup tier | Whole-home backup via paired hybrid inverter (capability is inverter-dependent | datasheet | Source |
| Open protocol & API maturity | Proprietary / no documented API | reviewed absence | Source +1 |
| Firmware & security disclosure | Firmware updates referenced; no security documentation | reviewed absence | Source +1 |
review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/byd-byd-battery-box-premium-hvl-12-0-us