Fox ESS EQ5500-L9 High Voltage Storage Battery

The manual expressly names EQ5500/EQ5500(w) in its scope and says: The battery chemistry of these products is Lithium Iron Phosphate. Exact module codes are printed on PDF page 12 and in the individual tables. No cell manufacturer, cell model or scalar property is inferred.

Location: PDF page 4, Notes on This Manual; exact module names on PDF pages 12, 38-39

Documented

Printed for this exact model in the cited table.

Location: PDF page 39, EQ5500-L9 Nominal energy (kWh)

Documented

Printed for this exact model in the cited table.

Location: PDF page 39, EQ5500-L9 Nominal voltage (V)

Documented

EQ&TQ manual expressly labels this rated capacity. The other manual labels its separate equal figure nominal capacity; neither label is silently changed.

Location: PDF page 39, EQ5500-L9 Rated capacity (Ah)

Documented

Printed for this exact model in the cited table.

Location: PDF page 40, (CC-CV) Standard charging current (A)

Documented

Printed for this exact model in the cited table.

Location: PDF page 40, Max. charge/discharge current (A)

Documented

Charging cut-off current; not discharge cutoff or an external protection rating.

Location: PDF page 40, Constant current and voltage charging cut-off current (A)

Documented

The table expressly names charge and discharge. Standard charge and peak discharge have separate rows.

Location: PDF page 40, Max. charge/discharge current (A)

Documented

Peak discharge for 60 seconds, as printed; not continuous current.

Location: PDF page 40, Peak discharge Current (60s) (A)

Documented

Printed system range; no module multiplication or calculated maximum.

Location: PDF page 39, EQ5500-L9 Battery voltage range (V)

Documented

The datasheet expressly labels both directions; separate from CC-CV standard charge row.

Location: PDF page 2, Recommend Charge/Discharge Current [A]

Documented

Strict >95 bound; @25°C, 0.3C charging/discharging, as printed.

Location: PDF page 2, Battery Pack Round-Trip Efficiency [%], footnote 2

Documented

Printed whole-system weight, not added from components.

Location: PDF page 40, EQ5500-L9 Weight (kg)

Documented

Printed whole-system dimensions; not a sum of parts. The native cell prints 570*1352*380; the PDF text layer separates its characters with spaces, and the literal extraction probe preserves those spaces.

Location: PDF page 40, EQ5500-L9 Dimensions (W*H*D) (mm)

Calculated

Printed for this exact model in the cited table.

Location: PDF page 40, Ingress protection

Documented

Printed for this exact model in the cited table.

Location: PDF page 40, Communication interfaces

Documented

Exact-model specification row in EQ&TQ manual. EQ Series table prints the same range, with (Recommended) on Main-pack and system rows; the separate conditional storage chapter is retained in storage_schedule.

Location: PDF page 40, Storage temperature (°C)

Documented

Maker claims each battery unit has a fire-protection module, not independent fire testing. Separate conflicting firefighting passages p12/p14 remain unresolved. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 9: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 9, section 2.2.2 Fire Protection Function

Documented

Unsuffixed model. Charge 0~55; discharge -10~55. Warm-up versions are recorded separately without scalar-table transfer.

Location: PDF page 40, Operating charge/discharge temperature (°C)

Documented

Printed for this exact model in the cited table.

Location: PDF page 40, Operating charge/discharge temperature (°C)

Documented

Separate printed contexts retained. Odd between±5% wording is preserved, no calculated threshold or voltage inferred. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 14, 37: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 12 and 35, installation and FAQ expanded-capacity requirements

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Display

Documented

Item G is Grounding cable in p16 package. Native p25 inset shows grounding connection at main-pack and M5 label, without numeric earth-terminal torque. Do not substitute mounting M5 torque. Support-pack diagram p7 has no separately identified external earth terminal. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 7, 8, 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 7-8 interface; PDF page 25 native grounding note and warning

Documented

Printed row, not calculated from the component counts.

Location: PDF page 2, Scalability

Documented

5 ~ 95 (No Condensation), as printed; not a storage-schedule humidity rating.

Location: PDF page 2, Humidity [%]

Documented

Both native diagram and prose preserved separately; wording ambiguity is not resolved by replacing rear 20 with 300. No numerical front clearance invented. Local installation and safety-clearance regulations apply. Module remains exposed to ambient air, cooled by natural convection; covering/shielding may stop operation. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 19: Same native rear ≥20 mm and top/left/right ≥300 mm diagram; different prose uses the figure for distances, rather than repeating ≥300 mm around the module. To ensure proper heat dissipation of the battery pack, a reasonable clearance must be left around it (see the figure above for the specific distance).

Location: PDF page 17, section 5.2 Clearance, diagram and second note

Documented

Literal maker standards/transport claims only; no independent certifier listing, certificate number, region or test result verified.

Location: PDF page 2, CERTIFICATES, Safety/EMC/Transportation

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Cooling Method

Documented

No address-setting procedure located. Module Addressing failed is a fault label only. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 6, 7, 8, 24, 27, 35, 36: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 6-25,33-34; full 42-page text keyword scan

Not documented

No AWG/mm² power/ground conductor gauge located. Diagram D and R are cable-diameter/bend labels without numerical conductor size. Package OT Terminal label supplies no numeric cable section. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 18, 24, 25, 26, 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 16,22-25; full 42-page text keyword scan

Not documented

Power-off SOC before storage. Note also requires recharge within 7 days when SOC reaches 0%; permanent faults caused by customer-delayed charging are beyond warranty scope. No warranty duration inferred. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 37: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 35, section 7.3.2 low-SOC storage table

Documented

Printed protection class; no regional or issuer-listing proof.

Location: PDF page 40, Protective class

Documented

Salt-affected region within 1000 m of coast or prone to sea breeze, with weather/terrain qualifications. Mounting requires completely waterproof area, hard level floor, wall without noticeable incline, low stable humidity, ventilation, minimized dust/dirt. No market inferred. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 14, 15: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 12-13, sections 3.3 and 3.4

Documented

Recommended storage time not more than 6 months. RH/duration/SOC conditions stay with each row. Range boundary overlap remains as printed. Storage chapter guidance remains separate from model-table recommended/ordinary storage-temperature rows. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 17: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 15, Storage Requirement conditional table

Documented

The two same-revision manuals give different startup, shutdown and black-start instructions for the same EQ5500 scope. EQ Series uses a separate B-Start Switch; EQ&TQ uses POWER-button timing. These are retained as source claims without choosing, combining or explaining them as hardware versions. Exact installed equipment and its applicable instructions are not established by this disagreement.

Location: EQ Series PDF pages 27-28; EQ&TQ PDF pages 29-30

Sources disagree

Inset also prints bend angle ≥90° and cable diameter D. This is a diameter-dependent bound without a numerical diameter, so no radius in mm calculated. Native inset independently visually read in this review. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 25, native cable inset

Documented

Maker battery-protection list; inverter-interface protections are separately listed. No external fuse/breaker rating inferred. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 8: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 8, section 2.2.1 Battery Protection Function

Documented

Printed Cell Net Weight, separate from whole-system weight.

Location: PDF page 2, EQ5500-L9 Cell Net Weight [kg] (±5%)

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Altitude [m]

Documented

Power connectors latch by pushing until click. No numeric battery power-terminal torque located. RJ45-body torque is separate. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 25: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 23 DC output procedure; full 42-page text keyword scan

Not documented

Native table cell line wraps joined; designation not decoded or treated as an ordering SKU.

Location: PDF page 39, EQ5500-L9 Battery designation

Documented

p25 pin table:1 A-START; 2 GND; 3 /; 4 BMS-CANL; 5 BMS-CANH; 6 BMS-CANH; 7 BMS-CANL; 8 /. Default wire harness PIN to PIN. p22 communication cable: BAT side to battery, INV side inverter. No external Support-pack RJ45 assigned; Exact module/system CAN table rows are separately recorded. Inverter wiring follows its exact user manual. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 7, 8, 24, 27: Same CAN/RJ45 and pin table, but interface/control drawings differ in separate B-Start Switch. That difference is not a CAN pinout change or a Support-pack external-port tie.

Location: PDF pages 7-8,22 and 25, Main-pack interface and native pin table

Documented

EQ Series manual expressly labels this nominal capacity; separate from rated capacity in EQ&TQ manual.

Location: PDF page 40, EQ5500-L9 Nominal capacity (Ah)

Documented

Lock body onto RJ45 board-end connector with open-end spanner. Tolerance retained; not power or earth torque. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 24: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 22, section 5.5 A Step 3

Documented

Indoor installation area must be no less than 10 m². Lower bound retained. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 19: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 17, section 5.2, indoor installation note

Documented

Bottom module leveled with footstand/spirit level; check level before main-pack; secure battery to wall using brackets. L is number of system layers. PDF p21: L≤6, one pair of Item D on Main-pack; L>6, one pair on Main-pack plus additional pair in middle layer of Support-pack modules. Item D is Fixing bracket in p16 package. Ground supports battery weight; outdoors hard and leveled. No horizontal mounting inferred. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 21, 22, 23: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 19-21, section 5.4

Documented

Printed temperature, tolerance and C-rate remain beside each figure; different quantity from rated or nominal capacity.

Location: PDF page 40, Discharge capacity (Ah)

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Installation Location

Documented

Two official manuals with the same printed revision V1.0.0 and month 2026-07 print different depth-of-discharge figures for this exact model. No publication order, hardware revision, selected percentage or usable energy is inferred. Each claim is retained with its own document and page.

Location: EQ Series PDF page 41; EQ&TQ Series PDF page 40; datasheet PDF page 2

Sources disagree

No numeric earth-terminal torque located. M5 screw label on p25 is size only; mounting/bracket M5 3~4 N·m p20 is not substituted. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 7, 8, 22, 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 7-8,20-25; full 42-page text keyword scan

Not documented

Battery system must be kept at least 2 meters from heat sources. Lower bound retained. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 19: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 17, section 5.2, heat-source note

Documented

Only printed component packages are listed. EQ5500-S is explicitly named under Support-pack Specifications (EQ Series PDF page 39; EQ&TQ page 38), and EQ5500-M under Main-pack Specifications (pages 40 and 39). Only explicit *4 quantities retained; illustration counts not counted. No whole-system package quantities derived. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 18: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 16, section 5.1 Items in the package

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Recommend Charge/Discharge Current [A]

Documented

Printed for this exact model in the cited table.

Location: PDF page 2, Fire Protection Function

Documented

Native M6 tool torque at Step 5, M5 tool torque at Step 6. Mounting/bracket fastener torques, not battery power or earth-terminal torque. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 22: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 20, section 5.4 Steps 5-6 diagrams

Documented

Printed drill diameter/depth. Strict >50 retained; not cable dimensions. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 22: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 20, section 5.4 Step 4 native diagram

Documented

Dedicated DC-output labels/steps on EQ Series PDF page 23 and EQ&TQ PDF page 25 are retained as printed evidence. The separate general paragraph on EQ Series page 25 and EQ&TQ page 27 mentions the inverter BMS port and expressly defers inverter wiring to its own manual. No completed inverter-end procedure or DC-power-to-BMS instruction is selected. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 25, 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected. Separate printed DC labels/steps: DC+ and DC- to battery; BAT+ and BAT- to inverter; DC- then DC+; push until click.

Location: PDF page 23, section 5.5 B

Not documented

Maker conditional storage-loss claim, repeated twice on page. No annual degradation calculated. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 17: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 15, repeated storage Note

Documented

Exact printed component counts. Not used to derive any system total.

Location: PDF page 39, EQ5500-L9 The number of batteries

Documented

No numeric external fuse or breaker rating located. Protection/fault labels and model-table short-circuit current are not external protective-device ratings. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 8, 16, 24, 25, 26, 27, 35, 36: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF pages 8,14,22-25,33-34; full 42-page text keyword scan

Not documented

PDF page 12 also prohibits exceeding inverter battery voltage rating and incompatible inverter connections. No exact compatible inverter list inferred. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 14, 23: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 21, warning

Documented

Battery module stored between -20°C~55°C and recharged regularly according to table after long storage. No current in amperes calculated. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 17: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 15, Storage Requirement paragraph

Documented

Adjacent note also requires screws installed. Do not merge with distinct optional protective cover p24. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 22: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 20, section 5.4 Step 6 note

Documented

Separate printed labels/scopes retained. These are not treated as replacement bounds or collapsed into one numeric value. Native ≥100mm and prose >30mm both documented; no cross-manual transfer. Main-pack EQ5500-M external interface/wiring within an assembled EQ5500 system. Do not assign external RJ45/ground/DC ports to the Support-pack EQ5500-S. EQ&TQ manual comparison, PDF pages 27: Same corresponding printed requirement or bounded unknown finding; no source priority selected. The >30 mm prose vertical length is not the separately printed ≥100 mm straight section, bend angle ≥90° or R≥6×D.

Location: PDF page 25, bottom power-cable warning and separate native bend/straight-section inset

Documented

p21 additionally prints: Support-pack less than 8(1~8) pieces; drawing prints Support-pack ≤8 Layers. Preserve awkward less-than/inclusive wording without silently changing it. Exact system component counts are on PDF page 40. No per-module scalar derived by dividing system totals. EQ5500 assembled system; on a module record, this describes installation through the assembled stack, not standalone operation. EQ&TQ manual comparison, PDF pages 6, 23: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 6, Product Introduction; PDF page 21, installation note

Documented

Fire-protection module discharge time, not electrical discharge duration. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 10: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 10, fire-protection Technical Specifications

Documented

Interval among battery-module manufacture dates, not warranty, life or maximum battery age. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 17: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 15, first-installation note

Documented

Thermal activation threshold of fire-protection module, not battery operating temperature. Common EQ5500 guidance within the named EQ4800/EQ5500 manual scope. Exact Support-pack = EQ5500-S and Main-pack = EQ5500-M are printed on PDF pages 39 and 40 respectively. EQ&TQ manual comparison, PDF pages 10: Same corresponding printed requirement or bounded unknown finding; no source priority selected.

Location: PDF page 10, fire-protection Technical Specifications

Documented