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Equipment directory/Energy storage
Sonnen Inc.

ECO5

Energy storage · 5 exact configurations · California, US

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A registry listing is a starting point. CEC inclusion is not nationwide installation approval. Confirm the exact model and configuration with your utility and local authority.

How to use this data

Equipment overview

3.6 kW, 4 kWh, 240 Vac LFP Energy Storage System with PCS Functionality

The figures below refer to ECO5 {4kWh}. Use the configuration table for other variants.

Nameplate power
3.6 kW
Nominal AC voltage
240 V AC
Nameplate energy capacity
4 kWh
Technology
Lithium Iron Phosphate
UL 1741 SB in CEC source
Not reported as Y
JA12 declaration
N

Specifications are reported in the CEC source; SolarApprovals has not independently tested this equipment. A missing value does not mean zero or a failed certification.

Exact configurations

CEC annotations in braces identify the listed configuration and are not part of the manufacturer’s model number. Variants share this canonical page.

Exact CEC configurations for ECO5
CEC model / configurationNameplate powerCapacityObservationCompare
ECO5 {4kWh}Energy Storage System row 62423.6 kW4 kWhListed in CEC
ECO5 {5kWh}Energy Storage System row 62433.6 kW5 kWhListed in CEC
ECO5 {6kWh}Energy Storage System row 62443.6 kW6 kWhListed in CEC
ECO5 {7.5kWh}Energy Storage System row 62453.6 kW7.5 kWhListed in CEC
ECO5 {8kWh}Energy Storage System row 62463.6 kW8 kWhListed in CEC

Source specifications and conditions

Additional source information for ECO5 {4kWh}. Qualifiers, reported control modes and required devices are retained as written. Power-control listings do not establish arbitrary battery/inverter pairings.

CEC listing date
2020-10-12
Source last update
2020-11-12
PV DC input capability
N
UL 9540 certificate date
2020-06-16
UL 9540 certifying entity
Intertek
Firmware version(s) tested
[001.006.063]
UL 1741 SB certificate date
No Information Submitted
UL 1741 SB certifying entity
No Information Submitted
Certified JA12 control strategies
No Information Submitted
Maximum continuous discharge rate (kW)
3
Manufacturer-declared round-trip efficiency (%)
No Information Submitted

Use the source row references above to inspect the conditions for each other configuration.

Documented compatibility

No specific equipment pairing has been verified for this model.

Shared voltage, a hybrid designation, or the same manufacturer does not establish compatibility. Check the manufacturer’s installation documents for exact model combinations, firmware, and operating conditions.

Registry observation history

Dates show when SolarApprovals observed a status. The first observation is not the original CEC listing date. History begins with our first import.

  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECECO5 {8kWh}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECECO5 {7.5kWh}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECECO5 {6kWh}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECECO5 {5kWh}
    Archived CEC source
  • Sep 21, 2026 · California Energy CommissionFirst observed: Listed in CECECO5 {4kWh}
    Archived CEC source