Charged Reviews

No product photos yet.

Fox ESS CQ20 (w) High Voltage Storage Battery

By Fox ESSSKU not documented

High-voltage stacked battery51.2 V
Evidence scoreResearch pending
No reviews · Write the first
Write a review
Basic specs19.96 kWhDischargeUnknownCharge196 A recommendedPeak current: 431.2 A$ / rated kWhUnavailableWarrantyUnknownSee termsLifetime productionNot publishedSize109.96 L*W: 450 × H: 270 × D: 905 mm150 kg330.69 lb0.18 kWh/L*CertificatesNone on fileEvidence missing

Key specs

Units
Nominal energy
19.96 kWh
Official datasheet
Sources

One battery as labeled by the table. The printed minimum is four batteries per system; this is not a complete-system total.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Nominal Energy [kWh]

Documented

Nominal voltage
51.2 V
High-voltage system module; maker prints a minimum of 4 batteries per system.Official datasheet
Sources

Printed Vdc; DC nominal voltage for the named battery.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Nominal Voltage [Vdc]

Documented

Peak discharge current
431.2 A
431.2 A @60S, as printed.Official datasheet
Sources

Printed duration @60S retained; not a continuous rating.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Peak Discharge Current [A]

Documented

Operating voltage range
46.4 to 58.2 V
Official datasheet
Sources

Printed Vdc range for the named battery; no system voltage derived.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Operating Voltage [Vdc]

Documented

Battery weight
150 kg331 lb converted
Approximate 150.0 kg (±5%), as printed.Official datasheet
Sources

Approximate and ±5% are printed qualifications. No added component weight.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Weight Approximate [kg] (±5%)

Documented

Dimensions
109.96 L
Calculated: Enclosure volume: W × H × D ÷ 1,000,000
W: 450 × H: 270 × D: 905 mmW: 17.7 × H: 10.6 × D: 35.6 in convertedW*H*D: 450*270*905 mm, as printed.Official datasheet
Sources

Axes follow the printed W*H*D label: width 450, height 270, depth 905. No axis correction or inferred measurement.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Dimension (W*H*D) [mm]

Calculated

Enclosure rating
IP66
Official datasheet
Sources

This is the battery table. Box/Base IP67 is not transferred to the battery.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Ingress Protection

Documented

3 specs not documented yet: usable energy, maximum discharge current, maximum charge currentHelp fill in ›

All specs26
Nominal energy
19.96 kWh
Official datasheet
Sources

One battery as labeled by the table. The printed minimum is four batteries per system; this is not a complete-system total.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Nominal Energy [kWh]

Documented

Usable energy
Not documented
Nominal voltage
51.2 V
High-voltage system module; maker prints a minimum of 4 batteries per system.Official datasheet
Sources

Printed Vdc; DC nominal voltage for the named battery.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Nominal Voltage [Vdc]

Documented

Maximum discharge current
Not documented
Official datasheet
Details

The shared Max. Charge/Discharge Current [A] row prints '196/240'. Retained unsplit in identity_notes, with footnote 1: The current is affected by temperature, cell voltage and SOC. Neither slash value is assigned to a direction or version; no single maximum is inferred.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w), Max. Charge/Discharge Current [A], footnote 1

Not documented

Maximum charge current
Not documented
Official datasheet
Details

The shared Max. Charge/Discharge Current [A] row prints '196/240'. Retained unsplit in identity_notes, with footnote 1: The current is affected by temperature, cell voltage and SOC. Neither slash value is assigned to a direction or version; no single maximum is inferred.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w), Max. Charge/Discharge Current [A], footnote 1

Not documented

Peak discharge current
431.2 A
431.2 A @60S, as printed.Official datasheet
Sources

Printed duration @60S retained; not a continuous rating.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Peak Discharge Current [A]

Documented

Operating voltage range
46.4 to 58.2 V
Official datasheet
Sources

Printed Vdc range for the named battery; no system voltage derived.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Operating Voltage [Vdc]

Documented

Recommended charge current
196 A
Official datasheet
Sources

The shared row explicitly names both charge and discharge.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Location: PDF page 2, CQ20 / CQ20 (w) table, Recommend Charge/Discharge Current [A]

Documented

Lifetime production

Not published

Published claims and calculations are not independently tested lifetime output.

Published claims and calculations, not independent test results.

Documents

1 on file
  • PDF
    Fox ESS CQ20 datasheet, V1.1, 2026/10/27OfficialFox ESSOfficial datasheetOctober 27, 2026

    Our copy is kept as private evidence and is not available to download. SHA-256: 42d400f1ae8678555f610008815b6f355ef9771ccbf6716383ac1b79e73bebb7, captured .

    Source details
    Revision
    V1.1
    Revision date
    October 27, 2026

    Archived copy captured on 2026-11-04.

    Location: PDF page 1 cover; PDF page 2 CQ20 / CQ20 (w) table and footnotes

    Retrieved

    Unchanged official original Fox ESS PDF from Alternative Research native public download-filter packet, hash verified by Research. Original acquisition UTC retained; no fresh capture claimed. English, labeled Global, no individual country market established. Box and Base are separate held components; no exact installation manual or warranty claimed. Manufacturer claims, not independent tests.

    Open

Submit a document

Warranty

No warranty terms on file.

Sellers

No sellers found.

Report a missing or wrong seller

Price history

No seller price history.

Owner reviews

No reviews yet

Own one? A verified review needs a receipt and a serial number photo, and counts 19× in the owner rating.

Write a review

Your reviews · Review policy

Evidence score

Research pending0% documented

The Evidence score uses the priorities you choose. It counts published documents, such as certificates and warranty terms, and it compares a documented figure with the best documented figure of the same kind. It does not count owner reviews, and it is not a verdict on product quality or on how many people have reviewed it. A low score can mean little is documented, or that a documented figure is below the best of its kind. Undisclosed data scores 0.

Missing for this product: Certificates evidence needed; Warranty term needed; Warranty energy disclosure evidence needed; Lifetime / capacity evidence needed; Cell model disclosure evidence needed.

High-voltage stacked batteries · Rated capacity

The warranty term and the lifetime energy are each scored against the best documented value for a home storage battery: a value earns its share of that best, times the weight. A documented value always earns points; an undisclosed one earns 0.

Lifetime / capacityResearch pending0 / 20

No qualifying figure · 20% weight

Not published. No lifetime-production bonus.

Not documented. Undisclosed data scores 0.

Official datasheet: Fox ESS CQ20 datasheet, V1.1, 2026/10/27 Rev V1.1 · October 27, 2026 · Checked · Earlier document

Research pending, 0 points: Certificates, Warranty term, Warranty energy disclosure, Cell model disclosure.

Computed from public specifications and evidence records. Warranty duration is not service quality; certificate evidence points are not a safety rating. Compatibility and installation limits still apply.

How it works Manufacturer? Submit documentation

Certificates

No certificates on file. Certificate guide

Parts and accessories

No sourced accessories or replacement parts listed yet.

Model history

Model identity

Model
CQ20 (w)

Manufacturer SKU unknown · Earlier class: DC battery module

No historical observations recorded yet.

Community discussions

No discussions linked yet. Search DIY Solar Forum

Recalls / legal notices

No recalls or legal notices on file; this is not a complete recall or court search. All notices · Report a notice

Fox ESS logo
Fox ESSProducts, reviews and history
4.0 (1)

Something wrong that is not one of the values above?

Prices · price basis. * Calculated; estimates labeled. Value needs confirmation; select it for the reason.