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Why San Diego Homeowners Choose SunFusion

We're not just another Energy Storage Installer, We are the Manufacture with Installation teams that know our systems. We're your partner in achieving true energy independence with the safest, most reliable systems on the market.

Industry-Leading Safety

Guardian Shell housing with 1125° fire rating and ultra-safe LiFePO4 batteries that won't catch fire or explode. Your family's safety is our top priority.

Massive Savings

30% federal tax credit + California incentives. Most customers eliminate 70-100% of their electric bills and see ROI in 6-8 years.

Never Lose Power

Seamless 5ms switchover keeps your lights on, refrigerator running, and Wi-Fi connected during outages. You won't even notice the switch.

Smart Monitoring

Monitor and control your system from anywhere with our mobile app. Get real-time energy data and AI-powered insights to maximize savings.

25+ Year Lifespan

Premium components designed to last 25+ years. ECHO batteries deliver 16,000+ charge cycles - that's decades of reliable performance.

Premium Sol-Ark Hybrid Inverters

The brain of your Energy Storage system. Sol-Ark inverters seamlessly manage solar panels, batteries, grid power, and backup generators for ultimate reliability and efficiency.

Sol-Ark 15K

Perfect for Most Homes

15kW
Continuous Power / 12kW battery Only
200A
Battery Charging
3 MPPT
Solar Inputs
<5ms
Transfer Time
  • Powers most homes with 15kW continuous output
  • 3 independent solar inputs for maximum harvest
  • Lightning-fast backup power switching
  • Works with any generator for extended backup
  • Monitor and control from your phone
View Details & Pricing →

Sol-Ark 18K

Maximum Power & Capacity

18kW
Continuous Power across the board 18kW all the way 36kW 10ms Peak
350A
Battery Charging
6 Ports
Solar Inputs
28kW
Max Solar
  • Highest capacity for large homes or businesses
  • 6 DC solar ports with 3 full MPPT controllers
  • Massive 350A battery charge rate
  • UL certified and California Rule 21 compliant
  • Virtual Power Plant (VPP) ready
View Details & Pricing →

ECHO LiFePO4 Battery Modules

Store your solar energy for use anytime. Ultra-safe LiFePO4 chemistry with Guardian Shell protection gives you decades of reliable backup power.

ECHO 2.0

Professional Grade Storage

14.3 kWh
Per Module
99%
Usable Capacity
16,000+
Cycles
250A
Peak Power
  • Ultra-safe LiFePO4 chemistry won't catch fire
  • 14 kWh usable capacity per module
  • 16,000+ cycles = 25+ years of daily use
  • UL certified for safety and performance
  • Stack up to 16 modules (228 kWh total)
View Details & Pricing →

ECHO 3.0

Next-Generation Storage

16.38 kWh
Per Module
99%
Usable Capacity
16,000+
Cycles
400A
Peak Power
  • Grade A cells with 99% depth of discharge
  • 400A peak discharge for high-power needs
  • Advanced BMS with AI-powered analytics
  • Extended temp range: -40°C to 60°C
  • Mobile monitoring down to cell level
View Details & Pricing →

Complete Turnkey Systems

Everything you need in one package. Inverter, batteries, and Guardian Shell housing - professionally installed and ready to power your home.

Guardian E2.0 System

Complete Whole-Home Backup

18kW Inverter
49.14 kWh Storage
1125° Protection
  • Sol-Ark 18K inverter + 3 ECHO 3.0 modules
  • Guardian Shell with 1125° fire protection
  • 24+ hours backup for typical homes
  • Supports up to 28kW solar array
  • Indoor/outdoor installation approved
  • Professional installation included
  • Remote monitoring and control
  • Comprehensive warranty coverage
Get System Quote →

Guardian Tower E2.0

Scalable for Any Need

Modular Design
49-98 kWh
Expandable
  • Choose your Sol-Ark inverter (5K to 18K)
  • 3-6 ECHO 3.0 modules (scalable)
  • Vertical tower design saves space
  • Hot-swappable battery modules
  • Perfect for high-demand homes
  • Expand storage as needs grow
  • Time-of-use optimization built-in
  • Professional engineering & install
Configure Your System →

How Solar + Storage Works

It's simpler than you think. Here's how your system keeps you powered 24/7.

☀️

During the Day

Solar panels generate electricity. Your home uses what it needs. Excess energy charges your batteries and flows to the grid for credits.

🌙

At Night

Your batteries power your home with stored solar energy. No expensive grid power needed during peak-rate hours.

During Outages

System automatically switches to battery power in under 5ms. Your lights stay on, fridge keeps running, Wi-Fi stays connected.

Your Questions Answered

Everything you need to know about going solar in San Diego

How much does a solar and battery system cost?

A complete solar and battery backup system for a typical San Diego home ranges from $25,000 to $50,000 before incentives. The 30% federal tax credit reduces this by $7,500 to $15,000. Most homeowners see their electric bills drop by 70-100%, with the system paying for itself in 6-8 years through energy savings. We offer free consultations to provide accurate pricing for your specific home and energy needs.

How long does installation take?

Physical installation typically takes 1-3 days. The complete process from consultation to activation takes 6-12 weeks, including system design, permitting, utility approval, installation, and final inspection. We handle all paperwork and coordination with the city and utility company, making it completely hassle-free for you.

Will I have power during an outage?

Yes! Unlike standard solar panels that shut off during outages, our Sol-Ark hybrid systems with ECHO batteries automatically keep your home powered. The system switches to battery power in under 5 milliseconds - so fast you won't even see your lights flicker. Depending on your battery capacity, you can power your entire home for 24-48 hours or longer.

Are LiFePO4 batteries safe?

Absolutely. LiFePO4 (Lithium Iron Phosphate) batteries are the safest lithium technology available. They're chemically stable, resistant to thermal runaway, and won't catch fire or explode. Our ECHO batteries add Guardian Shell housing with a 1125° fire rating for extra protection. They're UL certified and approved for both indoor and outdoor installation.

How long do the batteries last?

ECHO batteries are designed for 16,000+ charge cycles, which equals 25+ years of daily use. Even after 10,000 cycles, they still maintain 80% of their original capacity. This far exceeds lead-acid batteries (3-5 years) and matches or beats most other lithium systems. They're built to last as long as your solar panels.

Can I expand my system later?

Yes! Our systems are modular and designed for expansion. You can add more solar panels (within your inverter's capacity) and easily expand battery storage from 3 modules up to 16 modules (228 kWh). Start with what you need today and grow as your family or energy needs change. It's one of the key advantages of the ECHO system.

What incentives are available in California?

California homeowners can benefit from the 30% federal solar tax credit (ITC), which applies to the full system cost including batteries. Additional local incentives may be available through SDG&E or your municipality. Property tax exemptions mean your home value increases without raising property taxes. We'll help you identify and apply for all available incentives to maximize your savings.

Do you offer financing?

Yes, we work with multiple financing partners to offer flexible payment options including solar loans, leases, and power purchase agreements (PPAs). Many customers find that their monthly loan payment is less than their previous electric bill, meaning immediate positive cash flow. We'll help you find the best financing option for your situation.

Ready to Take Control of Your Energy Future?

Get a free, no-obligation consultation and custom system design for your home. Find out how much you can save with solar + storage.

Or use our online calculator to estimate your savings instantly

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