review.solar · Sourced values document
EQ4800
9.32–41.93 kWh · LFP · DC-coupled
FoxESS
Performance & Value
Released 2025 · Evidence checked 2026-07-27 · Scored to Solar Analytica battery rubric v2.9.0
64/100
Good
Overall
Score by category
Capacity & Usability
94
Power & Efficiency
68
Longevity (verified)
56
Safety & Chemistry
76
Guarantee & Backbone
50
Energy Ecosystem
45
Sourced specification values
Published capacity range9.32–41.93 kWh
Scored configuration9.32 kWh
Cell chemistryLFP (LiFePO4)
Usable capacity9.32 kWh
Usable energy / DoD100% DoD
Continuous power output4.48 kW
Round-trip efficiency95%
Warranty period10 yr
Safety certificationUL9540 / IEC62619
Reliability testingNot independently tested
Manufacturing track record4-10 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.

Page 2 · Audit sheet: complete sourced record (1 of 2)

EQ4800 · 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 (%)100datasheetSource
Modularity & scalabilityFully modular, ≤5 kWh increments, expandable in fielddatasheetSource
Energy density / footprintAveragedatasheetSource
Battery generation compatibilitySame-generation expansion only: matching spec modules required; clean path butdatasheetSource
Power & Efficiency
Round-trip efficiency (%)95datasheetSource
Continuous power output (kW)4.48datasheetSource
Backup switching speed>100ms or switching speed not disclosednot foundSource
Operating temperature rangeStandarddatasheetSource
Longevity (verified)
Warranty throughput2.5-5 MWh warranted per kWh usabledatasheetSource +1
Warranty period (yrs)10datasheetSource +1
End-of-warranty retained capacity (%)70datasheetSource +1
Verified reliabilityNot independently testednot foundSource
Cell balancing architecturePack-level only / not disclosednot foundSource
Warranty degradation guaranteeEnd-point only: minimum capacity at end of warranty termdatasheetSource +1

review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/foxess-eq4800-au

Page 3 · Audit sheet: complete sourced record (2 of 2)

EQ4800 · continued from page 2 · Solar Analytica rubric Solar Analytica battery rubric v2.9.0.

Safety & Chemistry
Cell chemistryLFP (LiFePO4)datasheetSource
Safety certificationUL9540 / IEC62619datasheetSource
Thermal & fire mitigationPassive thermal mgmtdatasheetSource
AC terminal & connection protectionNot specifiednot foundSource
Ingress protection (outdoor)IP65+ / IP66 outdoor-rateddatasheetSource
Guarantee & Backbone
Warranty assuranceParts onlydatasheetSource +1
Manufacturing track record4-10 years (or new brand, strong parent heritage)secondarySource
Energy Ecosystem
Grid-forming & backup tierWhole-home backup via paired hybrid inverter (capability is inverter-dependentdatasheetSource +1
Open protocol & API maturityProprietary / no documented APIdatasheetSource
VPP & grid services readinessVPP-capable (protocol ready, no confirmed live program)not foundSource
EV charging integrationNo EV integrationnot foundSource
Thermal load managementNo thermal load integrationnot foundSource
Smart home & IoT depthNo local smart home integrationnot foundSource
Dual-port flexibilityStandard single-mode integration: grid-tied + backup via one path, no independdatasheetSource

review.solar · audit sheet · Solar Analytica battery rubric v2.9.0 · https://review.solar/cards/foxess-eq4800-au