The assessment
How it scores, by category
Market position
The data
DC-coupled battery
Stores DC energy and relies on system power electronics outside the battery product for household AC.
- Product role
- The published battery record covers the storage stack, controller and stated capacity range.
- Published range
- 9.32–41.93 kWh
- Phase
- Not recorded
- Backup boundary
- Installation-specific
What the documents establish
Published evidence, source-reviewed non-disclosure and unresolved questions remain separate from the product score.
Usable capacity
100% of this battery’s nominal capacity is usable, 9.32 kWh in the scored configuration.9.32 kWh usableScored configuration: EQ4800-L2. Published range 9.32–41.93 kWh.
No reserve is withheld at the stated depth of discharge.
At a sourced 100% depth of discharge the usable and nominal figures are the same number, so no separate nominal capacity is stated.
Usable capacity sourceDepth-of-discharge sourceCapacity guarantee: minimum retained at year 10
No year-by-year capacity schedule is published for this product - the manufacturer guarantees only this end-of-term minimum, not a specific decline curve. Capacity figure based on the sourced usable capacity of the base configuration; modular systems scale with additional modules.
Blackout protection
51 / 100#67 of 90 batteriesWhole-home (via hybrid inverter)
The blackout score is a standalone benchmark of outage resilience only - it re-weights sourced specs already scored in this product’s pillars (backup tier, switchover, surge strength, backup power, off-grid recharge) and never affects the overall score. Dots show the full battery fleet; the marker is this product.
Verification & sources
Market context
Global evidencechange in the site menu
Global benchmark. This scorecard is benchmarked globally. A global score does not imply local availability, certification, warranty coverage, or installer compatibility.
Benchmark anchor. The score uses the 9.32 kWh EQ4800-L2 reference stack. The Australian series supports two to nine EQ4800 modules for 9.32 to 41.93 kWh usable capacity. Scored model: EQ4800-L2 · checked 2026-07-27. Evidence.
Sources & references · checked 2026-09-04
Strong evidence coverage
31 of 31 scored criteria link directly to a published source.
Values marked estimated, derived, or not found remain visible on the audit sheet and do not carry the same evidential weight as a linked source. Coverage measures direct links, not an independent guarantee that a claim is correct.
Record revision. EQ4800 current AU regulator identity, local warranty owner and distinct PowerQ boundary re-audited 2026-08-07. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged. T6 United States first-market overlay review 2026-09-04: official United States catalogues recorded; Australian and German overlays and scores unchanged.
- Sourced valuesData card →
- Warranty summary10-year product warranty →
Show 5 more
- Archived copy of the primary sourcePDF ↗
- Verified reliabilityManufacturer ↗
- Manufacturing track recordManufacturer ↗
- VPP & grid services readinessManufacturer ↗
- Firmware & security disclosureManufacturer ↗
Product record history
3 changes to this record · 17 products changed in this update
US Evidence sources
- Before
- https://www.foxesscloud.com/us/product/battery
- After
- https://www.fox-ess.com/us/; https://www.foxesscloud.com/us/product/battery
US Support Note
- Before
- foxesscloud.com/us/product/battery returns a JavaScript shell with no retrievable EQ4800-L2 identity. Held is not unavailable. EQ5500 and PowerQ are different identities.
- After
- foxesscloud.com/us/product/battery returns a JavaScript shell with no retrievable EQ4800-L2 identity. fox-ess.com/us returns 404. Held is not unavailable. EQ5500 and PowerQ are different identities.
Source revision
- Current text
- EQ4800 current AU regulator identity, local warranty owner and distinct PowerQ boundary re-audited 2026-08-07. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged. T6 United States first-market overlay review 2026-09-04: official United States catalogues recorded; Australian and German overlays and scores unchanged.
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
Primary datasheet
9 changes to this record · 152 products changed in this update
US Evidence sources
- Before
- Not previously recorded
- After
- https://www.foxesscloud.com/us/product/battery
DE Evidence sources
- Before
- Not previously recorded
- After
- https://de.foxesscloud.com/product/eq4800; https://www.foxesscloud.com/us/product/battery
Source revision
- Before
- EQ4800 current AU regulator identity, local warranty owner and distinct PowerQ boundary re-audited 2026-08-07
- After
- EQ4800 current AU regulator identity, local warranty owner and distinct PowerQ boundary re-audited 2026-08-07. First-market US and DE overlay review 2026-09-01: official regional catalogues recorded; Australian overlays and scores unchanged.
DE Support Note
- Before
- Not previously recorded
- After
- de.foxesscloud.com/product/eq4800 does not resolve. No German catalogue naming EQ4800-L2 was retrieved. Held is not unavailable.
US Support Note
- Before
- Not previously recorded
- After
- foxesscloud.com/us/product/battery returns a JavaScript shell with no retrievable EQ4800-L2 identity. Held is not unavailable. EQ5500 and PowerQ are different identities.
1 change to this record · 147 products changed in this update
Ab4C7008Ca85
- Current text
- accepted at: 2026-08-09; category: battery; certification model: EQ4800-L2; jurisdiction: au_cec; match method: exact_normalized_single_record; product slug: foxess-eq4800-au; source key: data/batteries/foxess_eq4800.json; source manufacturer name: FOXESS Co Ltd; validation: approved at: 2024-11-14; candidate model: EQ4800-L2; data confidence: High; evidence url: https://cer.gov.au/document/cec-approved-solar-batteries-0; expires at: 2027-11-14; list data version: au-cer-battery-2026-08-20-b3f077cbe945; list retrieved at: 2026-08-27T04:30:11Z; listing status at validation: listed
The previous text is not reproduced here: both versions run to a full research paragraph. Both are in the JSON record linked below.
AU market evidencesupersededAustralian approved-product source identity
2 changes to this record · 11 products changed in this update
Canonical identity
- Before
- FoxESS EQ4800 9.32 kWh
- After
- FoxESS EQ4800 High-Voltage Stack 9.32 kWh
8 changes to this record · 78 products changed in this update
State
- Before
- Not previously recorded
- After
- supported
Confidence
- Before
- Not previously recorded
- After
- high
Value
- Before
- Not previously recorded
- After
- The AU datasheet states battery-pack round-trip efficiency above 95%; 95% is stored conservatively.
State
- Before
- Not previously recorded
- After
- supported
Confidence
- Before
- Not previously recorded
- After
- high
Value
- Before
- Not previously recorded
- After
- The exact EQ4800 manual states at least 6,000 cycles at 25 C to 70% state of health; this is manufacturer engineering data, not an independent test.
Evidence sources
- Before
- Not previously recorded
- After
- https://au.fox-ess.com/Public/Uploads/uploadfile/files/20251219/ENEQ4800DatasheetAUV1.320250915.pdf
Evidence sources
- Before
- Not previously recorded
- After
- https://au.fox-ess.com/Public/Uploads/uploadfile/files/20251219/ENEQ4800DatasheetAUV1.320250915.pdf; https://www.fox-ess.com/Public/Uploads/uploadfile/files/20251231/ENEQ4800EQ5500ManualV1.0.8.pdf
This is review.solar's publication history. It does not claim the product changed on the recorded date, and it excludes compatibility, system pairing, installation suitability and relative leaderboard prose. Open the complete JSON record.
Evidence timeline
Recorded verification events for this scorecard. These are evidence checks, not historical score snapshots.
- Core scorecard evidence checked
- US market evidence checked
- DE market evidence checked
- Australian certification source identity verified
- AU market evidence checked
- Plain-language warranty summary checked
- Series benchmark evidence checked
Scored by Solar Analytica Research
Further reading from Findings
Stay across the benchmark.
New scorecards, score changes and market signals, published as they happen.
Our reading
EQ4800 High-Voltage Stack scores 67, placing 20 of 76 in the Performance & Value class against a class average of 63.0. Its strongest scoring dimension is capacity & usability (94), running 10.1 points above the class average on this dimension. Energy Ecosystem (49) is the dimension with the most room to move. Key specifications: LFP, 95% round-trip efficiency, 4.48 kW continuous output.
Dietreich Farquharson · review.solar