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Fox ESS ECS4000-H4 High-Voltage Battery (15.9 kWh)

Brand
Fox ESS
Model
ECS4000-H4
SKU / part number
?
Category
Batteries
chargedreviews.com/batteries/foxess-ecs4000-h4

Energy and chemistry

Nominal voltage230.4 V[1]
Rated capacity?
Nominal energy15.9 kWh[1]
Usable energy?
ChemistryLFP (LiFePO4)[1]
Cell format?

Charge and discharge

Continuous charge current?
Continuous discharge current?
Maximum charge current50 A[1]
Maximum discharge current50 A[1]
Peak charge current?
Peak discharge current65 A[1]
Continuous output power?
Peak output?
Maximum charge voltage?
Charge cutoff voltage?
Discharge cutoff voltage?

BMS and communication

BMS continuous current?
Communication protocolsCAN[1]
Wireless monitoring?
Inverter compatibility?

Operating temperature

Charging temperature-25 to 55 °C[1]
Discharging temperature?
Storage temperature-20 to 55 °C[1]
Self-heating?

Mechanical and mounting

Dimensions380 D × 570 W × 590 H mm[1]
Weight143.3 kg / 315.92 lb[1]
Terminals?
Mounting / formatStackableSite classificationBased on[1]
Enclosure rating (IP)IP65[1]

Installation (from the manual)

Not documented in the manual

System limits

Maximum parallel units?
Series connection?
Maximum system energy?

Page 1 of 2 · Installation values · ? means nothing is recordedAggregated, often community-reported information, not official documentation. Do not rely on it for installation, purchase or compliance decisions; always confirm values with the manufacturer’s official documentation. Charged Reviews accepts no responsibility for errors.

Charged Reviews · Quick reference

Fox ESS ECS4000-H4 High-Voltage Battery (15.9 kWh) · ECS4000-H4

Warranty

Warranty term12.5 years[1]
Warranty cycle limit?
Warranted throughput?
Capacity retention?
Cycle rating?
Estimated throughput?
Coverage starts?
Coverage conditions?
Remedy?
Labor and shipping?
Transfer to another owner?
Registration?

Certifications and listings

UL 1973?
UL 9540?
UL 9540A?
UN 38.3?
IEC 62619?
CE?

Documents and sources

  1. Fox ESS datasheet (US): ECS4000 high voltage storage battery, V1.5 | 2026/05/28Official datasheet · Revision V1.5 | 2026/05/28 · Revised Not stated · Checked Oct 20, 2026https://us.fox-ess.com/Public/Uploads/uploadfile/files/20261009/USECS4000datasheetV1.520260528.pdf
  2. Fox ESS US product page: ECS4000 (October 20, 2026 capture)Official product page · Revised Not stated · Checked Oct 20, 2026https://us.fox-ess.com/products/residential/ecs4000