How much does a solar plus battery system cost?

SunFusion Sol-Ark systems start at $5,999. ECHO 3.0 LiFePO4 batteries start at $3,175. The Guardian whole-home system starts at $27,373. The 30% federal tax credit (IRA) applies to all systems, significantly reducing net cost.

What makes SunFusion's batteries better than competitors?

SunFusion uses LiFePO4 (lithium iron phosphate) chemistry — zero thermal runaway risk, 16,000+ cycle life vs 3,000-5,000 for NMC competitors. Our industry-leading 9% failure rate compares to the competitor average of 30-60%.

Is SunFusion licensed to install solar in California?

Yes. SunFusion Energy Systems Inc. holds California C-10 Electrical Contractor License #1053778. Walter Ellard, founder and CEO, has 40+ years of electrical and energy industry experience.

What areas does SunFusion serve?

SunFusion installs throughout San Diego County, Riverside County, and San Bernardino County — including Temecula, Murrieta, Corona, Riverside, Palm Springs, San Bernardino, Redlands, and Rancho Cucamonga. We sell and ship Sol-Ark inverters, ECHO 3.0 batteries, and Guardian systems worldwide.

Does SunFusion sell products worldwide?

Yes. SunFusion sells and ships Sol-Ark hybrid inverters, ECHO 3.0 LiFePO4 battery systems, and Guardian energy storage solutions to customers worldwide. Contact us at (858) 217-8861 or info@sunfusion.us for international orders.

What is the ECHO 3.0 LiFePO4 battery cycle life?

The ECHO 3.0 LiFePO4 battery is rated for 16,000+ charge cycles — approximately 43+ years of daily use. This is 3-5x longer than NMC battery systems used by most competitors, and means you will likely never need to replace your battery bank.

Does SunFusion support FEMA and government agencies?

Yes. SunFusion's REDS (Rapid Energy Deployment Systems) division serves FEMA, DARPA, DoD, and federal facilities with ruggedized, deployable energy storage systems capable of 48-hour deployment to any location nationwide.

Does SunFusion offer financing?

Yes — $0-down solar loans, PACE financing, and lease/PPA options are available. Combined with the 30% federal solar tax credit, most customers achieve positive cash flow from day one.

How much does a solar plus battery system cost in San Diego?

A typical residential solar plus battery storage system in San Diego ranges from $15,000 to $45,000 depending on home size and energy needs. SunFusion offers Sol-Ark systems starting at $5,999 and ECHO 3.0 battery systems starting at $3,175. Federal tax credits of 30% apply, significantly reducing net cost.

What makes SunFusion's batteries better than competitors?

SunFusion uses LiFePO4 (lithium iron phosphate) chemistry in our ECHO and Guardian battery systems instead of the industry-standard NMC chemistry. LiFePO4 is dramatically safer (no thermal runaway risk), lasts 16,000+ cycles versus 3,000-5,000 for NMC, and never needs replacement under normal use. Our industry-leading 9% failure rate compares to the competitor average of 30-60%.

Is SunFusion licensed to install solar in California?

Yes. SunFusion Energy Systems Inc. holds California C-10 Electrical Contractor License #1053778. Walter Ellard, our founder and CEO, has 40+ years of experience in the electrical and energy industry.

What areas does SunFusion serve?

SunFusion serves San Diego County, Riverside County, and San Bernardino County in Southern California — including San Diego, La Jolla, Poway, Escondido, El Cajon, Chula Vista, Oceanside, Carlsbad, Encinitas, Temecula, Murrieta, Corona, Riverside, San Bernardino, Redlands, Palm Springs, Rancho Cucamonga, and Ontario. We also sell and ship ECHO LiFePO4 batteries, Sol-Ark inverters, and Guardian systems worldwide. Federal and commercial clients are served nationwide through our REDS division.

How long does a Sol-Ark solar installation take?

A typical residential Sol-Ark installation takes 1-2 days for the physical installation. Permits and utility interconnection can add 2-6 weeks to the total timeline. SunFusion handles all permitting, inspections, and utility coordination for you.

What is the ECHO LiFePO4 battery cycle life?

The ECHO LiFePO4 battery system is rated for 16,000+ charge cycles, which translates to approximately 43+ years of daily use. This is 3-5x longer than competing NMC battery systems and means you will likely never need to replace your battery bank.

Does SunFusion offer financing?

Yes, SunFusion offers multiple financing options including $0-down solar loans, PACE financing, and lease/PPA options. Combined with the 30% federal solar tax credit and California incentives, many customers achieve bill savings from day one.

What is the Guardian energy storage system?

The Guardian is SunFusion's premium whole-home energy storage solution. It integrates with Sol-Ark hybrid inverters and provides seamless whole-home backup power, solar self-consumption, and time-of-use optimization. Available in residential and commercial configurations.

SunFusion Energy Systems | Explore Clean Energy

Our Systems

Industry-Leading Energy Systems

Three product lines engineered for maximum reliability, safety, and performance. Every system we install goes into someone's home where their family lives — that's why we accept nothing less than the best.

Best Seller

Hybrid Inverter Systems

Sol-Ark Series

The world's most powerful all-in-one hybrid inverter. Grid-tie, off-grid, and backup power in a single unit. Powers entire homes during outages without any interruption.

Models Available12K · 15K · 18K · 30K · 60K

PhaseSingle & 3-Phase

Warranty10 Years

Battery CompatibleLiFePO4 / AGM / Lithium

Starting from $5,999

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Safest Chemistry

ECHO 3.0 LiFePO4 Battery Storage

ECHO 3.0 Series

Lithium Iron Phosphate chemistry — the safest battery technology available. No thermal runaway risk. 16,000+ cycle life means you will likely never replace this battery. Built for homes where families live.

Capacity Options10kWh · 20kWh · 40kWh

Cycle Life16,000+ cycles

ChemistryLiFePO4 (Iron Phosphate)

SafetyNo thermal runaway

Starting from $3,175

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Whole-Home Backup

Premium Energy Storage

Guardian System

SunFusion's flagship whole-home energy storage solution. Seamless backup power, solar self-consumption optimization, and time-of-use billing management. Residential and commercial configurations available.

ApplicationResidential & Commercial

IntegrationSol-Ark Compatible

MonitoringReal-time App Control

Backup SpeedSeamless (< 20ms)

Starting from $27,373

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Why SunFusion

Not All Energy Storage Is Equal

The solar industry's dirty secret: most companies use cheap NMC batteries that fail within 5 years. We refuse to. Every SunFusion system is built around LiFePO4 chemistry — safer, longer-lasting, and truly worth installing in the home where your family sleeps.

LiFePO4 Chemistry — The Safe Choice

Lithium iron phosphate cannot catch fire or explode. Zero thermal runaway risk. The same chemistry used in aircraft and medical devices. This matters when it's mounted in your home.

9% Failure Rate — Industry Benchmark

Our competitors fail at 30-60%. We've achieved 9% by engineering out failure points, using premium cells from Hithium, and treating every installation as a 40-year investment.

Sol-Ark — The Best Inverter Built

Sol-Ark's hybrid inverter is the only unit on the market that handles grid-tie, off-grid, generator backup, and whole-home battery management in a single, weatherproof enclosure.

40+ Years — Real Experience

Walter Ellard founded SunFusion after 40+ years in electrical and energy. We hold C-10 License #1053778. We've seen every shortcut in this industry — and we take none of them.

Feature SunFusion Competitors

Battery Chemistry LiFePO4 ✓ NMC ✗

Thermal Runaway Risk NONE ✓ Yes ✗

Battery Cycle Life 16,000+ ✓ 3,000–5,000 ✗

Failure Rate 9% ✓ 30–60% ✗

Inverter Brand Sol-Ark ✓ Various

Years Experience 40+ Years ✓ 2–8 Years ✗

C-10 Electrical License #1053778 ✓ Often No ✗

Federal (REDS) Capable Yes ✓ No ✗

Walter's Promise

"Every system I install goes into someone's home where their family lives. I refuse to compromise on safety or quality. That's not marketing — that's why I sleep at night."

— Walter Ellard, Founder & CEO

REDS Division

Federal & Emergency Deployment

SunFusion's Rapid Energy Deployment Systems (REDS) division provides energy storage solutions to federal agencies, FEMA emergency response, DARPA research projects, and government facilities.

FEMA Ready

DARPA Compatible

DoD Capable

Rapid Deploy

GSA Schedule

SAM.gov Registered

Our REDS units can be deployed within 48 hours to disaster zones, military installations, or emergency command centers. Self-contained, weather-resistant, and operational without grid infrastructure.

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48hr

Deployment Time

100%

Off-Grid Capable

3Φ

3-Phase Available

MW+

Scalable Capacity

5-Star Reviews

What Our Customers Say

147 five-star reviews across Google, Facebook, and Yelp. Real homeowners and businesses around the world trust SunFusion with their energy independence. The CEO uses their own system at home and business.

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(858) 217-8861

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Service Area

San Diego · Riverside · San Bernardino Counties + Worldwide

Business Hours

Mon–Fri 7am–6pm · Sat 8am–3pm

License

C-10 Electrical #1053778

30% Federal Tax Credit

The Inflation Reduction Act provides a 30% federal tax credit on the full installed cost of solar + battery systems through 2032. On a $30,000 system, that's $9,000 back at tax time.

SunFusion by the numbers

Industry-Leading Energy Systems

Sol-Ark Series

ECHO 3.0 Series

Guardian System

Not All Energy Storage Is Equal

LiFePO4 Chemistry — The Safe Choice

9% Failure Rate — Industry Benchmark

Sol-Ark — The Best Inverter Built

40+ Years — Real Experience

3 Counties. 1 World.

Federal & Emergency Deployment

What Our Customers Say

Frequently Asked Questions

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