SunFusion Energy Systems ECHO T Series

14–70 kWh · 9–30 kW · Lithium Ion · direct PV input · 30 configurations

UL 9540UL 1741 SBCEC listed · Jan 21, 2022

Nameplate energy14–70 kWh
Continuous power9–30 kW
Round trip (AC)96.5%
ChemistryLithium Ion

Overview

CEC Energy Storage System List

ECHO T Series: 14–70 kWh nameplate energy; 9–30 kW continuous; lithium ion; accepts solar panels directly (DC-coupled).

Models & configurations

CEC Energy Storage System List · 30 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
Echo 2.0 5T {208V, 9kW, 14kWh}	14 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 9kW, 14kWh}	14 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 18kW, 14kWh}	14 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 18kW, 14kWh}	14 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 9kW, 28kWh}	28 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 9kW, 28kWh}	28 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 15kW, 28kWh}	28 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 15kW, 28kWh}	28 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 18kW, 28kWh}	28 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 18kW, 28kWh}	28 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 9kW, 42kWh}	42 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 9kW, 42kWh}	42 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 15kW, 42kWh}	42 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 15kW, 42kWh}	42 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 18kW, 42kWh}	42 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 18kW, 42kWh}	42 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 30kW, 42kWh}	42 kWh	30 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 30kW, 42kWh}	42 kWh	30 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 9kW, 56kWh}	56 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 9kW, 56kWh}	56 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 15kW, 56kWh}	56 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 15kW, 56kWh}	56 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 18kW, 56kWh}	56 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 5T {240V, 18kW, 56kWh}	56 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 5T {208V, 30kW, 56kWh}	56 kWh	30 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 30kW, 56kWh}	56 kWh	30 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 15kW, 70kWh}	70 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 15kW, 70kWh}	70 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 5T {208V, 30kW, 70kWh}	70 kWh	30 kW	208 V	96%	Sep 21, 2023
Echo 2.0 5T {240V, 30kW, 70kWh}	70 kWh	30 kW	240 V	96%	Sep 21, 2023

Capacity & power

CEC Energy Storage System List

Nameplate energy (CEC)14–70 kWh
Rated power (CEC)9–30 kW
Max continuous discharge (CEC)9–30 kW
Full-power discharge timeabout 2.3 h at full power
Round-trip efficiency (AC-AC)96.5%
ChemistryLithium Ion
Grid connection208 / 240 V

Charging from solar in Southern California

NLR PVWatts v8 · Cali-Graf calculation · CEC Energy Storage System List

City	December	June
Los Angeles	21.8 kW	12.9 kW
Palmdale	20.1 kW	11.7 kW
Chula Vista	18.6 kW	13.3 kW
Huntington Beach	20.5 kW	14.2 kW
Riverside	20.9 kW	12.4 kW
Santa Clarita	20.6 kW	12.2 kW

Solar array size that refills the battery from empty in one average day, before the home uses any of it (NLR PVWatts v8, 20° south roof).

Direct PV inputYes

Safety listings

CEC Energy Storage System List

UL 9540 (energy storage system)Certified by Intertek
Certificate date & editionDec 2, 2021 · Ed. 1 : 2016

UL 9540 certifies the whole storage system; UL 9540A is the fire-propagation test that fire codes ask for indoors and near walls.

California grid & code compliance

CEC Energy Storage System List

UL 1741 SB (IEEE 1547-2018)Yes
UL 1741 SA (Rule 21)No
CSIP (IEEE 2030.5)Yes (with conditions)
JA12 declaration (Title 24)Yes
JA12 control strategiesBasic, TOU, Advance DR
Last CEC updateFeb 1, 2024
Monitor Key Data schedulingNo

Compare with similar batteries

CEC Energy Storage System List

Battery	Energy	Continuous power	Chemistry	Warranty	SoCal permits
Sol-Ark L3 HVR	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	7
Sol-Ark L3 HV-xxKWH-xxK	36.9–55.3 kWh	30–60 kW	Lithium Iron Phosphate	10 years	—

Same segment, similar capacity; each row from the same sources.

Questions & answers

How much energy does the SunFusion Energy Systems ECHO T Series store?

14–70 kWh nameplate, per the California Energy Commission list.

Is the ECHO T Series UL 9540 certified?

Yes — the CEC list shows UL 9540 certification (certified by intertek).

Sources

California Energy Commission — Energy Storage System List, data as of Oct 7, 2026. Manufacturer-reported values confirmed by CEC against certificates.
NLR (formerly NREL) — PVWatts v8, NSRDB PSM v3 typical-year weather for Los Angeles, Palmdale, Riverside, Santa Clarita, Chula Vista, Huntington Beach.
Cali-Graf calculations — formulas and inputs are shown next to each calculated value (efficiency from area, temperature-corrected voltages, string sizing, energy estimates).