Utility-Free Home Solutions San Diego | SunFusion Energy Systems | Solar + Battery Storage
🔒 Licensed C-10 Electrical Contractor #1053778 | ⭐ 4.9/5 Rating | 📞 Serving San Diego County

True Energy Independence is Here
SunFusion Utility-Free Home Solutions

Break free from rising utility costs forever. Professional solar + battery storage systems starting at $3,175. Eliminate meter fees, demand charges, and unpredictable rate hikes.

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The Utility Cost Crisis is Here

California utility rates are skyrocketing. Even if you use zero electricity, you'll soon pay hundreds just to stay connected to the grid.

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Rising Meter Fees

$150+

Monthly meter fees are projected to increase from $15-20 to $150+ regardless of usage within the next 12-24 months.

⚡

Demand Charges

40%+

Demand charges and time-of-use rates penalize peak consumption, adding 40%+ to bills even with solar panels.

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Total Cost Impact

$3,600+

Average California homeowners could pay $3,600+ annually just in fixed fees and connection charges by 2027.

The SunFusion Solution: Complete Energy Independence

Eliminate your utility connection entirely—legally and safely—where local regulations permit.

SunFusion Guardian Energy Storage System

Our CEO Lives Utility-Free. You Can Too.

We don't just sell utility-free systems—our leadership team lives on them daily. Our CEO's home runs entirely on SunFusion technology, and our office reduced utility costs by 75%.

  • Zero Monthly Utility Bills: No meter fees, no demand charges, no rate hikes
  • Guardian Energy Storage: Pre-engineered systems sized for your home's needs
  • ECHO LiFePO4 Batteries: 16,000+ cycle life, safest chemistry available
  • Sol-Ark Hybrid Inverters: Grid-tied or off-grid capability, seamless operation
  • Complete Code Compliance: C-10 licensed contractor handles all permits and inspections
  • Title 24 ESS-Ready: Future-proof infrastructure for California requirements

Proven Performance, Real Results

16,000+
Battery Cycle Life
$198
Per kWh (Industry Leading)
20+
Year System Lifespan
75%
Office Cost Reduction

Unbeatable Pricing, Premium Quality

Industry-leading value without compromising safety or performance. Compare our pricing to any competitor.

ECHO Battery Module

$3,175
16kWh | Just $198/kWh
  • 16,000+ cycle life rating
  • LiFePO4 chemistry (safest available)
  • IP67 waterproof submersible
  • Universal 48V compatibility
  • Cobalt & manganese free
  • Modular expansion capability
  • 20+ year lifespan
  • UL 9540B certified
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Most Popular

Guardian Tower E2.0

$15,900
Complete System | Installed
  • Sol-Ark 12K hybrid inverter
  • 48kWh ECHO battery storage
  • Guardian Shell IP67 enclosure
  • Professional installation
  • All permits & inspections
  • System commissioning
  • Warranty & support
  • Powers typical 3BR home
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Quantum Custom

Custom
Tailored to Your Needs
  • Load analysis & system sizing
  • Sol-Ark 15K or 18K inverter
  • 64kWh+ battery capacity
  • Backup generator integration
  • Advanced monitoring
  • Multi-zone capabilities
  • Commercial-grade components
  • Lifetime support
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Compare to competitors: Tesla Powerwall ($500-550/kWh) | Enphase IQ ($600-700/kWh)
SunFusion: $198/kWh 60%+ Savings

Superior Technology: LiFePO4 vs Lithium-Ion

Not all lithium batteries are created equal. SunFusion uses Lithium IRON Phosphate—the safest chemistry available.

Feature SunFusion LiFePO4 Lithium-Ion (Competitors)
Thermal Stability ✓ No thermal runaway risk ✗ Can overheat/catch fire
Cycle Life ✓ 16,000+ cycles ✗ 6,000-8,000 cycles
Cobalt Content ✓ 100% Cobalt-free ✗ Contains cobalt
Manganese Content ✓ Manganese-free ✗ Contains manganese
Environmental Impact ✓ Lower toxicity ✗ Higher toxicity
Operating Temperature ✓ Wide range (-4°F to 140°F) ✗ Limited range
Inverter Compatibility ✓ Universal 48V ✗ Often proprietary
Warranty Period ✓ 20+ years ✗ 10-15 years

What Our Customers Say

Real homeowners, real results, real energy independence.

"
★★★★★

We eliminated our $450/month SDG&E bill completely. The system paid for itself in under 5 years, and now we're producing free power every day. SunFusion's team was professional from start to finish.

Michael & Sarah Rodriguez
Poway, CA • Guardian Tower E2.0
"
★★★★★

After years of dealing with utility rate hikes and power outages, we went utility-free with SunFusion. Best decision ever. Our home is powered 24/7, and we haven't had a single issue in 2 years.

James Chen
Escondido, CA • Quantum Custom System
"
★★★★★

The ECHO batteries are incredible. We upgraded from our old lead-acid system and the difference is night and day. More power, more reliable, and the peace of mind knowing we're 100% independent is priceless.

Patricia Williams
Ramona, CA • ECHO Battery Retrofit

Your Path to Energy Independence

Simple, transparent process from consultation to commissioning.

1

Free Assessment

We analyze your energy usage, site conditions, and jurisdictional requirements to determine if utility-free living is right for you.

2

Custom System Design

Our engineers design a system sized precisely for your needs, with transparent pricing and ROI calculations.

3

Permits & Approvals

We handle all permitting, utility coordination, and building department approvals as a licensed C-10 contractor.

4

Professional Installation

Licensed electricians install your system with meticulous attention to code compliance and safety standards.

5

Commissioning & Training

We test every component, program your system for optimal performance, and train you on operation and monitoring.

6

Ongoing Support

Enjoy lifetime technical support, system monitoring, and access to our service team whenever you need us.

Frequently Asked Questions

Everything you need to know about going utility-free.

Is it really legal to remove my utility meter? +
Yes, in many jurisdictions—but requirements vary significantly by location. In unincorporated San Diego County and many California municipalities, you can disconnect from the utility if you maintain code-compliant essential services (hot water, running water, roof, toilet) and have a properly sized energy storage system with solar PV. SunFusion provides compliance assessments for your specific location and handles all permitting and approvals with local building departments.
How much does a complete utility-free system cost? +
Complete systems typically range from $15,900 for our Guardian Tower E2.0 (suitable for average 3-bedroom homes) to custom Quantum systems starting around $25,000 for larger homes or higher energy needs. Individual ECHO battery modules start at just $3,175 for 16kWh. We provide transparent pricing with detailed ROI calculations showing payback periods typically between 4-7 years depending on your current utility costs.
What happens on cloudy days or during winter? +
Our systems are designed with battery storage capacity to cover 3-7 days of typical usage without sun. During extended cloudy periods, the system draws from battery reserves that were charged during sunny days. We size systems conservatively based on your location's solar production data, accounting for seasonal variations. In San Diego County's climate, properly sized systems maintain year-round independence.
Why is LiFePO4 better than standard lithium-ion? +
Lithium Iron Phosphate (LiFePO4) is fundamentally safer than lithium-ion. LiFePO4 doesn't experience thermal runaway, lasts 2-3X longer (16,000+ cycles vs 6,000-8,000), contains no toxic cobalt or manganese, and operates safely across wider temperature ranges. While lithium-ion batteries have made headlines for fires and failures, LiFePO4 chemistry is proven safe for residential installations—which is why our CEO trusts it in his own home.
Can I expand my system later if my needs increase? +
Absolutely. Our ECHO battery modules are designed for modular expansion. You can start with a smaller system and add battery capacity as needed. The Sol-Ark inverters we use support multiple battery banks and can be paralleled for increased capacity. We design all systems with expansion capability in mind, making it easy and cost-effective to grow your system over time.
What kind of maintenance do these systems require? +
Minimal maintenance. Solar panels should be cleaned 2-4 times per year depending on dust and pollen in your area. The ECHO batteries are sealed units with no maintenance required. We recommend an annual system inspection to verify connections, check inverter performance, and update monitoring software. Most customers perform basic cleaning themselves, with professional inspections every 1-2 years.
What's your warranty coverage? +
ECHO batteries come with 25-year warranties covering defects and performance degradation. Sol-Ark inverters have 10-year warranties. Our installation workmanship is warranted for 10 years. We also provide lifetime technical support—if you have questions or issues at any point, our team is here to help. Unlike some competitors, we don't disappear after installation.
How long does installation take? +
After permits are approved (typically 2-4 weeks), physical installation takes 3-7 days depending on system size and site complexity. We schedule work to minimize disruption to your daily routine. The process includes solar panel installation, battery and inverter setup, electrical integration, system commissioning, and final inspection. You'll have backup generator capability during the transition if needed.

Ready to Eliminate Your Utility Bill Forever?

Get your free utility-free home assessment today. No obligation, just expert analysis and honest recommendations.

📞 Call Now: (858) 544-0227 📧 Email Us

Licensed C-10 Electrical Contractor #1053778
Serving San Diego County and Southern California