| Published capacity range | 7.16–25.04 kWh |
| Scored configuration | 7.16 kWh |
| Cell chemistry | LFP (LiFePO4) |
| Usable capacity | 7.155 kWh |
| Usable energy / DoD | 90% DoD |
| Continuous power output | 3.8 kW |
| Round-trip efficiency | 95% |
| Warranty period | 12.5 yr |
| Safety certification | UL9540 / IEC62619 |
| Reliability testing | Not independently tested |
| Manufacturing track record | 4-10 years (or new brand, strong parent heritage) |
Some values are estimated where independent verification was not available: see the full scorecard and review.solar/terms.
PowerQ EQ4000 · 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 (%) | 90 | datasheet | Source |
| Modularity & scalability | Fully modular / stackable expandable | datasheet | Source +1 |
| Energy density / footprint | Compact high-density (integrated) | datasheet | Source |
| Power & Efficiency | |||
| Round-trip efficiency (%) | 95 | datasheet | Source +1 |
| Continuous power output (kW) | 3.8 | datasheet | Source |
| Operating temperature range | Standard | datasheet | Source |
| Backup surge / motor-start capability | Motor-start rating published (LRA) | datasheet | Source |
| Longevity (verified) | |||
| Warranty throughput | 2.5-5 MWh warranted per kWh usable | datasheet | Source |
| Warranty period (yrs) | 12.5 | datasheet | Source |
| End-of-warranty retained capacity (%) | 70 | datasheet | Source |
| Verified reliability | Not independently tested | reviewed absence | Source +1 |
| Warranty degradation guarantee | End-point only: minimum capacity at end of warranty term | datasheet | Source +1 |
| Safety & Chemistry | |||
| Cell chemistry | LFP (LiFePO4) | datasheet | Source |
| Safety certification | UL9540 / IEC62619 | datasheet | Source +1 |
| Thermal & fire mitigation | Passive thermal mgmt | datasheet | Source |
| AC terminal & connection protection | Not specified | reviewed absence | Source +1 |
| Ingress protection (outdoor) | IP65+ / IP66 outdoor-rated | datasheet | Source |
| Cell provenance & traceability | Supplier named | stated | Source |
| Guarantee & Backbone | |||
| Warranty assurance | Parts only | datasheet | Source |
| Manufacturing track record | 4-10 years (or new brand, strong parent heritage) | secondary | No link |
| Energy Ecosystem | |||
| Open protocol & API maturity | Cloud API only | datasheet | Source +1 |
| EV charging integration | No EV integration | reviewed absence | Source +1 |
| Thermal load management | No thermal load integration | reviewed absence | Source +1 |
| Smart home & IoT depth | No local smart home integration | 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/foxess-co-ltd-foxess-powerq-all-in-one-residential-battery-s