SunFusion Energy Systems ECHO T Series

Name: SunFusion Energy Systems ECHO T Series
Brand: SunFusion Energy Systems

14–56 kWh · 9–30 kW · Lithium Ion · direct PV input · 22 configurations

UL 9540UL 1741 SBCEC listed · Jan 21, 2022

Overview

CEC Energy Storage System List

ECHO T Series: 14–56 kWh nameplate energy; 9–30 kW continuous; lithium ion; accepts solar panels directly (DC-coupled).

CEC Energy Storage System List · 22 listings

Model	Energy	Power	Grid voltage	Round trip	CEC listed
Echo 2.0 4T {208V, 9kW, 14kWh}	14 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 9kW, 14kWh}	14 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 15kW, 14kWh}	14 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 4T {240V, 15kW, 14kWh}	14 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 4T {208V, 18kW, 14kWh}	14 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 18kW, 14kWh}	14 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 9kW, 28kWh}	28 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 9kW, 28kWh}	28 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 15kW, 28kWh}	28 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 4T {240V, 15kW, 28kWh}	28 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 4T {208V, 18kW, 28kWh}	28 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 18kW, 28kWh}	28 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 9kW, 42kWh}	42 kWh	9 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 9kW, 42kWh}	42 kWh	9 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 18kW, 42kWh}	42 kWh	18 kW	208 V	96%	Jan 21, 2022
Echo 2.0 4T {240V, 18kW, 42kWh}	42 kWh	18 kW	240 V	96%	Jan 21, 2022
Echo 2.0 4T {208V, 30kW, 42kWh}	42 kWh	30 kW	208 V	96%	Sep 21, 2023
Echo 2.0 4T {240V, 30kW, 42kWh}	42 kWh	30 kW	240 V	96%	Sep 21, 2023
Echo 2.0 4T {208V, 15kW, 56kWh}	56 kWh	15 kW	208 V	96%	Sep 21, 2023
Echo 2.0 4T {240V, 15kW, 56kWh}	56 kWh	15 kW	240 V	96%	Sep 21, 2023
Echo 2.0 4T {208V, 30kW, 56kWh}	56 kWh	30 kW	208 V	96%	Sep 21, 2023
Echo 2.0 4T {240V, 30kW, 56kWh}	56 kWh	30 kW	240 V	96%	Sep 21, 2023

CEC Energy Storage System List

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

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).

CEC Energy Storage System List

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

CEC Energy Storage System List

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
EG4 Electronics PP-16/280A3-18K1-AWLL	43 kWh	10.4–12 kW	Lithium Iron Phosphate	10 years	—
EG4 Electronics PP-16/280A3-18K2-AWLL	43 kWh	20.8–24 kW	Lithium Iron Phosphate	10 years	—
Power Center Duracell	14–42 kWh	5 kW	Lithium Iron Phosphate	—	—
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.

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

14–56 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).

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).