What is residential battery storage?

Residential battery storage systems like Tesla Powerwall and Enphase batteries store energy from solar panels or the grid to provide backup power during outages and reduce reliance on utility electricity during peak rate periods.

How long will a Tesla Powerwall power my home?

A Tesla Powerwall can power essential home systems for 8-24 hours depending on your energy usage. Multiple Powerwalls can be installed for extended backup duration and whole-home coverage.

Can I add battery storage to my existing solar system?

Yes, battery storage can be added to most existing solar panel systems. We'll evaluate your current setup and recommend the best battery solution for seamless integration.

How much does residential battery storage cost?

Residential battery storage systems typically range from $15,000-$25,000 installed, depending on capacity and features. We offer $0 down financing options and free detailed quotes.

What's the difference between Tesla Powerwall and Enphase batteries?

Tesla Powerwall offers higher capacity (13.5 kWh) in a single unit, while Enphase batteries are modular (5 kWh each) allowing for scalable systems. Both provide excellent backup power and smart monitoring features.

Do battery storage systems require maintenance?

Modern battery systems require minimal maintenance. We provide monitoring services and periodic system checks to ensure optimal performance throughout the 10-year warranty period.

Are there incentives for battery storage installation?

Yes, battery storage systems qualify for the 30% federal tax credit when installed with solar. Additional state and utility rebates may be available for Bay Area residents.

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

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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

Maximize Solar Investment

Store excess solar energy during the day and use it at night. Get full value from every kilowatt your panels produce.

100% solar utilization

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

Zero Maintenance Required

Modern battery systems are completely maintenance-free. Install it and forget it for 10+ years.

Set and forget

Our Simple Process

How Battery Installation Works

From first call to backup power protection in as little as 1-4 weeks.

Home Assessment

We analyze your energy usage, electrical panel, and backup needs to design the perfect system.

Tailored Solution

Our engineers create a tailored battery solution with detailed pricing and financing options.

Professional Installation

Certified installers handle everything—permits, electrical work, and utility coordination.

Instant Protection

Your battery activates immediately. Monitor and control everything from your phone.

PREMIUM BATTERY SYSTEMS

Top-Tier Battery Brands We Install

We install only the best battery systems with proven reliability and performance.

Tesla Powerwall

Popular Choice

13.5 kWH unit

Ideal for: Complete home backup & solar storage

Enphase IQ Battery

Flexible & Reliable

3.4 – 10.1 kWH per unit

Ideal for: Flexible sizing & existing solar systems

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

    
 
 
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   Stephanie R.G. Edelman 
 
 
 
 Trustindex verifies that the original source of the review is Google. We had a great experience using Simmitri after a previous company went bankrupt. Simmitri folks were responsive, thoughtful and knowledgeable.
  
 
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   Andrea Goldsmith 
 
 
 
 Trustindex verifies that the original source of the review is Google. Simmitri installed our Enphase solar panels and later our battery system. They did a terrific job.   Our system runs well after three years. They were good to work with. Their office helped us with the California document submission. We are pleased!
  
 
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   David Martinez 
 
 
 
 Trustindex verifies that the original source of the review is Google. After interviewing 3 solar companies I selected Simmiti for my dolar installation. The planning and submissions to PGE and SCCounty Building were done in a timely manner. The installation crew was superb. The inspector was highly impressed with the installation. Ana, my PM, stayed on all parties to get the final steps of approvals. I highly recommend Simmitri for your solar project. 9/12/2025 I just recently added 6 panels to my system (added e-car) and Pamela at Simmitri handled my project. Communication throughout the project was excellent and the crew, once again were FANTASTIC! Simmitri is a pleasure to work with.
  
 
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   Denise Tsang 
 
 
 
 Trustindex verifies that the original source of the review is Google. We can say that installing and working with Simmitri was a seamless experience. They did exactly as they say they would. The staff is amazing to work with, especially the Project Manager Pamela Rodriguez and the Sales Manager Lonnie Cory. The installation crew was fast, clean and friendly. All in all, a great experience working with them from the beginning... and continuing. We are so happy with our new system!
  
 
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   Ben Bartyzel 
 
 
 
 Trustindex verifies that the original source of the review is Google. Simmitri Inc. roofers did an excellent roof replacement for me, they were on time and on budget.  I highly recommend this firm.
  
 
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   Jerry Suarez 
 
 
 
 Trustindex verifies that the original source of the review is Google. Our project began in 2020 with the construction of our new home. When we were ready for our Solar installation, Jonathan walked us through every step of the way. The installation crew were fast, competent, and thorough. We couldn't have asked for a better experience!!
  
 
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   Lanard C 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great company....solar appointment was the best I have seen and very informative ...no pressure and very polite approach focusing on my interests and needs.  System was installed and it was a great experience...
  
 
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   Dylan Nunn 
 
 
 
 Trustindex verifies that the original source of the review is Google. Great experience!
  
 
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   Steve McShane 
 
 
 
 Trustindex verifies that the original source of the review is Google. Wow! The service and attention to detail that Jonathan and his team provides is astounding. We had a complicated project with a complicated team and every question was answered in a timely fashion. Every one of the reviews I read is spot on. Thank you, Simmitri.

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

Call Us Today!

Monday – Friday: 9am – 5pm Pacific | Free consulation

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!

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.

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