Residential Battery Storage
Keep your lights on, appliances running, and family safe during outages. Professional home battery storage installation with $0 down financing.
Trusted since 1995 • Solar Energy Certified • Join 500+ Local Homeowners with Battery Backup
Why Battery Storage?
Benefits of Home Battery Storage
Discover why homeowners are adding battery storage to protect their homes and save money.
Backup Power During Outages
Keep your essential appliances running when the grid goes down. Refrigerators, lights, medical equipment, WiFi — all protected.
Peace of mind 24/7
Reduce Peak Hour Rates
Store cheap off-peak energy and use it during expensive peak hours. Cut your electricity costs by 20-40%.
Save $1,000-$2,500+/year
Energy Independence
Reduce dependence on the grid and volatile utility rates. Take control of your home’s energy future.
Grid independence
Seamless Automatic Backup
Battery kicks in instantly during outages — often before you even notice. No generators, no noise, no fuel.
Instant switchover
Our Simple Process
How Battery Installation Works
From first call to backup power protection in as little as 1-4 weeks.
PREMIUM BATTERY SYSTEMS
Top-Tier Battery Brands We Install
We install only the best battery systems with proven reliability and performance.
13.5 kWH unit
- Whole-home backup capable
- Sleek, compact design
- Tesla app monitoring
- Storm Watch feature
- Scalable up to 10 units
Ideal for: Complete home backup & solar storage
3.4 – 10.1 kWH per unit
- Micro-inverter technology
- Modular scaling
- Enphase app ecosystem
- Works with any solar
- Scalable up to 10 units
Ideal for: Flexible sizing & existing solar systems
- All systems include 10-year warranty
Why Choose Simmitri
Trusted Battery Storage Experts
Certified Installers
Tesla Powerwall Certified, Enphase trained, and fully licensed.
10-Year Warranty
Full coverage on equipment and workmanship for peace of mind.
Full-Service Provider
We handle permits, installation, and utility coordination.
Fast Installation
Most battery installations completed in just one day.
29+ Years Experience
500+ battery installations across the Bay Area.
Lifetime Support
Dedicated support team for the life of your system.
Our Promise to You
- Tesla Powerwall Certified Installer
- Enphase Trained Installer
- Premium equipment only
- 10-year comprehensive warranty
- Same-day emergency support
- 24/7 system monitoring
500+
Batteries Installed
5-Star
Customer Rating
Client Testimonials
What Our Customers Are Saying
Join thousands of happy homeowners saving with solar
Contact Us
Get Your Free Home Battery Quote
See exactly what a battery backup system costs for your home. No obligation, no pressure.
Custom System Sizing
Right-sized for your home and needs
Backup Time Calculator
See how long your battery will last
Financing Options Review
$0 down options available
See why Marion and Paul recommend Simmitri
*Real Client Experience Video Testimonial*
Frequently Asked Questions
Home Battery Storage FAQs
Everything you need to know about battery backup for your home.
How long will a home battery power my house during an outage?
It depends on your battery capacity and what you power. A single Tesla Powerwall (13.5 kWh) can power essential loads (refrigerator, lights, WiFi, phone charging) for 24-48 hours. For whole-home backup, multiple batteries may be needed. We'll calculate your specific backup time during the free assessment.
Do I need solar panels to get a battery?
No, you can install a battery without solar. The battery will charge from the grid during cheap off-peak hours and discharge during expensive peak hours, saving you money. However, pairing solar with battery maximizes savings and provides true energy independence.
How much does home battery storage cost?
A complete battery installation typically costs $10,000-$20,000 depending on the system size and brand. Tesla Powerwall is around $11,500-$15,000 installed. With $0 down financing, monthly payments can be as low as $100-$150. We provide detailed pricing in your free assessment.
What is the best battery warranty?
Most premium batteries come with 10-year warranties. Tesla Powerwall is warranted for 10 years with unlimited cycles. Enphase offers a 10-year or 15-year warranty option. We also provide our own workmanship warranty on installation.
How long does a battery installation take?
Most battery installations are completed in a single day (4-8 hours). The full process from signing to activation takes 2-4 weeks, primarily due to permit processing. We handle all permits and utility coordination.
Will the battery work automatically during an outage?
Yes! When the grid goes down, your battery automatically switches to backup mode within milliseconds - often before you even notice. When power returns, it seamlessly reconnects and resumes normal operation.
Can I add more batteries later?
Yes, most battery systems are designed to be scalable. You can start with one battery and add more later as your needs change. We design your initial installation with future expansion in mind.
What maintenance does a home battery require?
Modern home batteries are virtually maintenance-free. There are no moving parts, no fuel to add, and no regular service needed. The system monitors itself 24/7, and you can check status anytime via the smartphone app.
Still have questions? We’re happy to help!
- The Simmitri App
Putting The Sun’s Power At Your Fingertips
We’re committed to your success. This is why we built and continue to improve our mobile app. With it, you harness and control your new clean energy system from…just about anywhere! Throughout your project, it will act as a command center keeping you updated and informed in real-time every step of the way, as well as housing all your documents and media files.
Once your project is complete and your system is running, you’ll be able to monitor your usage, track production levels, maximize efficiency, review annual reports, and much more! The Simmitri app is convenient and powerful, making your energy management experience second to none, both during your installation and well beyond for the lifetime of your system.
