What is LiFePO4 and why is it safer than other batteries?

LiFePO4 (Lithium Iron Phosphate) is the safest lithium battery chemistry available. Unlike NMC batteries used by most competitors, LiFePO4 has zero thermal runaway risk — it physically cannot catch fire or explode. SunFusion exclusively uses Hithium 314Ah Grade-A LiFePO4 cells with 16,000+ cycle life.

Does SunFusion ship nationwide across the United States?

Yes. SunFusion ships Sol-Ark hybrid inverters, ECHO LiFePO4 batteries, and Guardian energy storage systems to all 50 states. Installation services are available in San Diego, Riverside, and San Bernardino Counties. Product sales and shipping are available nationwide and worldwide.

What Sol-Ark inverter models does SunFusion carry?

SunFusion carries the full Sol-Ark lineup: Sol-Ark 12K and 15K (single-phase residential), Sol-Ark 18K (single-phase whole-home), Sol-Ark 30K (3-phase 208V commercial), and Sol-Ark 60K (3-phase 480V industrial). All models include 10-year warranties and are available for immediate shipping.

What ECHO battery options are available?

SunFusion offers the ECHO 3.0 (16.38 kWh, 48V residential), ECHO 4.0HV (48.2 kWh, 153.6V, 48 cells), ECHO 5.0HV (96.5 kWh, 307.2V, 96 cells), and ECHO 6.0HV (144.7 kWh, 460.8V, 144 cells). All use Hithium 314Ah Grade-A LiFePO4 cells with 16,000+ cycle life and are compatible with Guardian HV enclosures.

Is there a federal tax credit available for solar and battery storage?

Yes. The Inflation Reduction Act provides a 30% federal tax credit on the full installed cost of solar and battery storage systems through 2032. On a $30,000 system, that is $9,000 back at tax time. SunFusion systems qualify for this credit.

How long do ECHO LiFePO4 batteries last?

ECHO batteries using Hithium 314Ah Grade-A LiFePO4 cells are rated for 16,000+ cycles at 98% depth of discharge, with a calendar life of 25+ years. This means daily cycling for over 40 years before reaching end of life. SunFusion batteries come with a 15-year warranty.

What is SunFusion's failure rate compared to the industry?

SunFusion has achieved a 9% failure rate, compared to the industry average of 30-60%. This is accomplished by using only Hithium Grade-A cells, Sol-Ark inverters, and treating every installation as a 40-year investment. SunFusion has had zero field failures since launching the ECHO 3.0 platform in 2023.

Is monitoring included with SunFusion systems?

Third-party monitoring (such as Solar Assistant) may be provided as a courtesy at no cost, but it is not designed, maintained, or warranted by SunFusion. SunFusion Monitor is our proprietary premium add-on monitoring platform with cell-level monitoring, PSPS alerts, Storm Mode, and 25-year data retention. It is available at additional cost and is the only monitoring system supported by SunFusion.

How do I contact SunFusion Energy Systems?

The best ways to reach SunFusion are by text message to (858) 217-8861, email to info@sunfusion.us, or leaving a detailed voicemail. As the founder and sole owner/operator of a rapidly growing company, Mr. Ellard personally reviews every message and will investigate your issue and get back to you.

ECHO® HV Flagship · Maximum Capacity LiFePO₄

ECHO 6.0HV
48.2 kWh High-Voltage
Battery System

The flagship of SunFusion's HV lineup. 144 Hithium 314Ah Grade-A LiFePO₄ cells in a massive 144S configuration deliver 460.8V nominal and 144.7 kWh of total energy. The ultimate battery for Sol-Ark 30K and 60K commercial systems. Guardian HV enclosure. 16,000+ cycles.

144.7kWh

Usable Energy

460.8V

Nominal

314Ah

Hithium Grade-A

16,000+

Cycles

🔋 Get HV Quote ☎ (858) 217-8861

ECHO® 6.0HV

Charging

ECHO 6.0HV

144.7 kWh · 460.8V · 144S1P

92%

State of Charge

475.2V

Bus Voltage

133.1kWh

Available

23°C

Cell Temp

144

Cells

314Ah

Hithium

3.30V

Avg Cell V

144S Architecture · 9 × 16-Cell Sub-Modules in Series

16S

= 144S · 460.8V · 144.7 kWh

Technology

Hithium 314Ah — The Gold Standard

Every ECHO HV system uses the same Hithium 314Ah Grade-A prismatic cells that power our 48V ECHO 3.0 modules — now in high-voltage series configurations for 3-phase commercial inverters.

🔋

144.7 kWh · 144S1P

144 Hithium 314Ah cells wired in series. Nine 16-cell sub-modules create 460.8V nominal — maximum energy density in a single battery string.

144 × Hithium 314Ah Grade-A
144S1P (9 × 16S sub-modules)
460.8V nominal (345.6–525.6V)
Same cells as ECHO 3.0
98% usable DOD

⏳

16,000+ Cycle Life

Hithium Grade-A LiFePO₄ cells deliver 16,000+ cycles at 98% DOD — that's 25+ years of daily cycling without ever replacing a cell.

16,000+ cycles @ 98% DOD
25+ year calendar life
Zero capacity memory effect
<0.5% monthly self-discharge
Grade-A cell selection only

🧠

HV Battery Management

Master + slave BMS architecture with active balancing across all 48 cells. CAN bus and RS485 for native Sol-Ark communication.

Master + 9 slave BMS boards
Active cell balancing
CAN bus & RS485 comms
Sol-Ark native protocol
Cell-level voltage monitoring

🔒

Zero Thermal Runaway

LiFePO₄ chemistry physically cannot catch fire or explode. No NMC, no NCA — ever. The chemistry trusted in aircraft and medical devices.

LiFePO₄ = zero thermal runaway
No NMC / No NCA
Multi-level overcurrent protect
Over/under voltage shutoff
Thermal sensor per module

🛡️

Guardian HV Enclosure

Designed to mount inside the Guardian HV shell — aerospace-grade aluminum with integrated fire suppression and 1125°F fire safety rating.

Guardian HV shell compatible
1125°F fire safety rating
Aerospace-grade aluminum
Integrated fire suppression
Indoor / outdoor rated

📊

SunFusion Monitor

Real-time monitoring to the individual cell level via the SunFusion Monitor platform. SMS & email alerts. Predictive maintenance.

Cell-level voltage display
Real-time SOC & SOH
SMS + email alerts
Predictive maintenance
Remote diagnostics

Specifications

ECHO 6.0HV Technical Data

144.7

kWh

Total Energy

460.8

V Nominal

System Voltage

314

Hithium Cells

144

Cells

144S1P Config

16K+

Cycles

Cycle Life

% DOD

Usable Depth

Round-Trip Eff.

25+

Years

Design Life

Specification	Value
Model	ECHO 6.0HV
Total Energy	144.7 kWh
Usable Energy (98% DOD)	141.8 kWh
Nominal Voltage	460.8V
Voltage Range	345.6V – 525.6V
Cell Type	Hithium 314Ah LiFePO₄ Grade-A
Cell Configuration	144S1P (9 × 16S sub-modules)
Continuous Discharge	100A (46.1 kW)
Peak Discharge (30s)	200A (92.2 kW)
Max Charge Current	100A
Depth of Discharge	98%
Round-Trip Efficiency	≥97%
Cycle Life	16,000+ @ 98% DOD
Calendar Life	25+ years
Self-Discharge	<0.5% / month
Operating Temperature	-20°C to 60°C
BMS Architecture	Master + 9 × Slave
BMS Communication	CAN bus & RS485
Enclosure	Guardian HV Compatible
Chemistry	LiFePO₄ (Lithium Iron Phosphate)
Safety Certifications	UL9540, UL9540A, UL1973
Warranty	15 Years / 16,000 Cycles

Compatibility

Sol-Ark HV Integration

At 460.8V, the ECHO 6.0HV delivers the maximum energy possible in a single battery string — perfectly matched for both the Sol-Ark 30K and Sol-Ark 60K commercial inverters.

⚡

Sol-Ark 30K (150–550V)

460.8V sits in the upper-mid range of the 30K's 150–550V input. 144.7 kWh provides 4.8+ hours of full-load backup at 30kW continuous.

Maximum capacity for 30K

⚡

Sol-Ark 60K (160–800V)

460.8V is ideal for the 60K's 160–800V range. 144.7 kWh provides 2.4+ hours at 60kW full load — the largest single-string battery available.

Maximum capacity for 60K

Full HV Lineup

Choose Your Capacity

ECHO 6.0HV

48.2 kWh

48 cells · 153.6V
3 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles

ECHO 5.0HV

96.5 kWh

96 cells · 307.2V
6 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles

ECHO 6.0HV

144.7 kWh

144 cells · 460.8V
9 × 16S sub-modules
Hithium 314Ah Grade-A
16,000+ cycles

Get Started

144.7 kWh — Maximum HV Capacity

The ECHO 6.0HV is the most powerful single-string battery SunFusion builds — 144.7 kWh of pure LiFePO₄ in a Guardian HV enclosure.

$27,500

Battery system · Guardian HV enclosure sold separately · 30% Federal Tax Credit eligible

🔋 Configure My System ☎ (858) 217-8861

SunFusion Energy Systems — Shipping Nationwide USA

SunFusion Energy Systems ships Sol-Ark hybrid inverters, ECHO LiFePO₄ batteries, and Guardian energy storage systems to all 50 states.

States: California, Texas, Florida, Arizona, Nevada, Colorado, Georgia, North Carolina, Washington, Oregon, New York, Illinois, Ohio, Pennsylvania, Virginia, Tennessee, Michigan, Massachusetts, Maryland, Minnesota, Wisconsin, Missouri, Indiana, South Carolina, Alabama, Louisiana, Kentucky, Oklahoma, Connecticut, Utah, Iowa, Arkansas, Kansas, Nebraska, New Mexico, Hawaii, Idaho, Montana, Wyoming, Alaska, Vermont, Maine, New Hampshire, Rhode Island, Delaware

Cities: Los Angeles, San Francisco, San Diego, Phoenix, Tucson, Las Vegas, Denver, Dallas, Houston, Austin, San Antonio, Miami, Tampa, Orlando, Atlanta, Nashville, Charlotte, Raleigh, Seattle, Portland, New York, Chicago, Boston, Philadelphia, Washington DC, Minneapolis, Detroit, Columbus, Indianapolis, St Louis, Kansas City, Salt Lake City, Boise, Albuquerque, Honolulu

📱 Best Way to Reach Us

Text (858) 217-8861 · Email info@sunfusion.us · Voicemail with details
Mr. Ellard reviews every message and will get back to you.

ECHO 6.0HV48.2 kWh High-VoltageBattery System

ECHO 6.0HV

Hithium 314Ah — The Gold Standard

144.7 kWh · 144S1P

16,000+ Cycle Life

HV Battery Management

Zero Thermal Runaway

Guardian HV Enclosure

SunFusion Monitor

ECHO 6.0HV Technical Data

Sol-Ark HV Integration

Sol-Ark 30K (150–550V)

Sol-Ark 60K (160–800V)

Choose Your Capacity

ECHO 6.0HV

ECHO 5.0HV

ECHO 6.0HV

144.7 kWh — Maximum HV Capacity

ECHO 6.0HV
48.2 kWh High-Voltage
Battery System