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.

⚡ Sol-Ark® Premium · Best Seller

18K
Hybrid Inverter

The most powerful single-phase hybrid inverter on the market. 18kW continuous output, 350A battery charger, 200A pass-through, 6 solar inputs with 3 full-sized MPPTs. The inverter that does everything.

18kW

Continuous

200A

Pass-Through

350A

Battery Charger

Solar Inputs

⚡ Get Quote ☎ (858) 217-8861

Sol-Ark® Premium · Best Seller

Operational

SA-18K

18kW Hybrid Inverter

12.4kW

PV Power

92%

Battery

15.8kW

Load

18kW

AC Output

350A

Charger

5ms

Transfer

☀️

Arrays

→

⚡

18K

→

🔋

Battery

→

🏠

Home

→

⚙️

Generator

Capabilities

The Most Powerful Single-Phase Inverter

The Sol-Ark 18K is our best seller for a reason — it handles any home, any load, with the most backup power available in a single-phase unit.

⚡

18kW Maximum Power

The most backup power in a single-phase unit. 200A pass-through powers your entire home including AC, pool, EV charger.

18,000W continuous output
200A grid pass-through
5ms ultra-fast transfer
Whole home protection
Advanced surge protection

☀️

6 Solar Inputs · 3 MPPTs

Six DC solar ports with three full-sized MPPT controllers at 36A each. Maximum solar harvesting from any roof layout.

6× DC solar ports
3× full-sized MPPT
36A per MPPT controller
Wide voltage range
Maximum solar harvest

🔋

350A Battery Charger

The fastest battery charger in its class. Dual 48V battery ports with UL9540 safety certification. LiFePO₄ optimized.

350A battery charger
2× 48V battery ports
UL9540 safety options
Scalable storage
LiFePO₄ compatible

🌐

Smart Grid Control

Multi-season time-of-use optimization, peak shaving, net metering, and virtual power plant ready.

Multi-season TOU
Peak shaving
Net metering compatible
VPP ready
Advanced load management

🔧

Generator Ready

Dedicated generator port with auto-start, AC coupling support, and fuel efficiency mode for extended outages.

Dedicated GEN port
AutoStart capable
AC coupling support
Fuel efficiency mode
Load priority control

🛡️

Safety & Compliance

UL 1741 SA certified with IEEE 1547-2018, NEC 690.12 rapid shutdown, arc fault and ground fault protection.

UL 1741 SA certified
IEEE 1547-2018
NEC 690.12 rapid shutdown
Arc fault protection
Ground fault detection

Specifications

Sol-Ark 18K Technical Data

Continuous Power

200

Pass-Through

350

Battery Charger

Inputs

Solar Ports

MPPTs

Charge Controllers

Transfer Time

UL9540

Safety Certified

Years

Warranty

Specification	Value
Model	SA-18K
Continuous AC Power	18,000W
AC Voltage	120/240V Split-Phase
Grid Pass-Through	200A
Solar Inputs	6 DC Ports
MPPT Controllers	3 Full-Sized (36A each)
Max PV Current	108A total
Battery Charging	350A
Battery Ports	2× 48V
Battery Type	LiFePO₄ / AGM / Lithium
Transfer Time	5ms Ultra-Fast
Generator Port	Yes — Auto-Start
Communication	WiFi & Ethernet
Enclosure	NEMA 3R / Outdoor Rated
Certifications	UL 1741 SA, IEEE 1547-2018, UL9540
Warranty	10 Years

Our Best Seller — Sol-Ark 18K

$10,000

Inverter only · 30% Federal Tax Credit eligible · ECHO batteries sold separately

⚡ Get Free Quote ☎ (858) 217-8861

📱 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.

SunFusion Energy Systems — Shipping Nationwide 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, Scottsdale, Las Vegas, Henderson, Denver, Colorado Springs, Dallas, Fort Worth, Houston, Austin, San Antonio, Miami, Tampa, Orlando, Jacksonville, 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

Solar battery storage, home backup power, commercial energy storage, off-grid solar, LiFePO4 batteries, Sol-Ark inverters, Guardian systems, whole home battery backup, best solar company USA, solar installer near me, solar panel installation, battery backup system, residential solar, commercial solar, industrial solar.

18KHybrid Inverter