Resilient clean energy for all
Smart Energy Storage Solutions for Homes & Businesses
Why Energy STorage?
Reduce Energy Costs
Energy storage allows you to store excess solar power, reducing reliance on the grid and lowering electricity bills.
REduce Carbon Footprint
By using stored solar energy, you minimize dependence on fossil fuels, contributing to a cleaner environment.
POwer outage protection
Solar batteries provide backup power during outages, ensuring uninterrupted energy supply for your home or business.
Off-grid independence
Energy storage gives you the flexibility to live or operate in remote areas without access to the traditional power grid.
Why Fortress Power?
Industry leading warranty up to 25 years
We’re setting industry standards with cutting edge battery technology, super durable product hardware and intelligent energy management. Our advanced LFP battery technology has the longest life cycle (8000+ cycles).
Earn upfront and ongoing incentives
Our energy storage systems enable seamless Virtual Power Plant (VPP) participation, earning you upfront and ongoing incentives while supporting grid stability and a sustainable energy future.
Proven Quality
As an industry pioneer, we’ve supplied Uninterrupted Clean Energy to 40,000+ homes and businesses around the globe with the highest quality products.
Local Support Engineers
Knowlegable in-house engineers and local dealer partners are available 7 days a week to provide you best-in-class support.
Residential, Commercial and Industrial
Energy Storage Solutions

Our Residential solutions provide homeowners with reliable backup power, lower energy costs, and the ability to participate in grid programs for additional savings.

For Commercial & Industrial applications, our scalable storage systems optimize energy management, reduce peak demand charges, and enhance resiliency.

Did you know?
Your Fortress Power System can Earn you Money
With Fortress Power’s Energybroker VPP program, you can sell your extra energy back to the grid and earn passive income. It’s a simple way for you to let your Fortress Power energy system start paying you back!
We Have You Covered
Residential, Commerical and Industrial Applications

Whole Home Backup
Keep your entire home powered during outages with a reliable solar energy storage system

Off-Grid Living
Achieve true grid independence by choosing a self-sustaining solar storage solution

Energy Independence
Reduce reliance on the grid and take control of your energy usage with solar energy storage

Reduce Energy Costs
Solar storage can help to reudce your peak charges from the utility company to save money.

Zero Export
Ensure all your solar energy is consumed or stored onsite, minimizing grid dependency.

Demand Mitigation
Reduce peak energy usage by storing solar power, lowering utility costs and demand charges.

EV Charging
Combine solar and battery storage to deliver efficient, cost-effective energy for commercial charging stations.

Microgrid
Microgrids can help businesses by providing a cost-effective solution for managing energy usage and saving money
Client Testimonials
Don’t just take our word for it
Our reputation speaks for itself. Hear from our Certified Fortress Power Installers, Industry Distribution Partners and satisfied Homeowners and Business Owners.
Ken BenderApril 7, 2025Trustindex verifies that the original source of the review is Google. This last weekend and I mean on a Sunday my Fortress battery guy Gary Oosbree, whom I have never met, help me restart my system. I had a Sol-Ark inverter that went bad. My Fortress batteries are humming! All is well Jody Dugan (72Devilz)April 6, 2025Trustindex verifies that the original source of the review is Google. I have been installing the Fortress Power Envy and EFlex products for primarily off grid installs in California since late 2023 and have been working directly with Gary in technical support on every install since day one. The product has been solid, remains the most well rounded product I have available for mid to large installs and has met all my customers needs, the operation and app operation has been picked up quickly by my customers and callbacks have been minimal to none since install(s). Any issues that have surfaced have been addressed in quick fashion by Gary or in unusual cases he has worked directly with me to troubleshoot and identify a problem and work out a solution. Gary has taken the time to answer my questions and explain operation related to customization for each different scenario I have ran into and continues to look over each and every system remotely after deployment to make sure everything is set up for maximum efficiency. My calls and questions have been answered directly or within the day each time I have called in. I have worked with many manufacturers over the years and in almost all cases the reason I have moved away from a product has been lack of available tech support and lack of knowledge by tech support, I don’t have time to sit in a long queue or wait a day or two to get a return call and the main reason I remain with this company is their attention to their installers. I can say that their attention to my needs and openness to my suggestions is what keeps me loyal and will remain so as long as their installer support remains the way it has been these past couple years. Included are a few pictures of some of the installs of the Fortress Power Envy product. South EnergyMarch 22, 2025Trustindex verifies that the original source of the review is Google. EL SERVICIO TECNICO DEL CREW DE PR ES EL MEJOR! Lee ShusterMarch 11, 2025Trustindex verifies that the original source of the review is Google. Caroline Poroski is a customer-centric professional that listens carefully and answered all my questions. It's rare to encounter such professionalism these days! Kudos to Caroline! Mark MoxMarch 6, 2025Trustindex verifies that the original source of the review is Google. When Sol-Ark would not support closed loop with my E-flex batteries, the Fortress engineers stepped up to give me tools to update my batteries' software and helped with connecting the closed loop communications. Thanks to all of my friends at Fortess. Mark Mox, Michigan Christian OrtizMarch 4, 2025Trustindex verifies that the original source of the review is Google. Llevo poco mas de 5 años trabajando con sistemas solares en PR y la velsatilidad que brinda Fortress no tiene comparacion. Exelente servicio de Hector Sanchez (Account Manager) y exelente compromiso de Maria Elena (Directora de Latam & PR) con los clientes y las compañias instaladoras. Recomiendo el producto 100% para su confiabilidad y tranquilidad para su negocio o casa. Jose "West" Pagan-SanabriaMarch 4, 2025Trustindex verifies that the original source of the review is Google. Great Team, Great Company, Great Leadership, Great Technology ! Highly Recommended! One of the best Technical Support Team! Daniel OcasioMarch 4, 2025Trustindex verifies that the original source of the review is Google. I had the pleasure of working with Maria Elena Barrera from Fortress Power, and I can confidently say that her professionalism, expertise, and dedication to customer satisfaction are unmatched. She is incredibly knowledgeable about advance LFP technology and solar energy solutions and goes above and beyond to ensure clients receive the best support possible. Maria Elena’s prompt responses, clear communication, and problem-solving skills make her an invaluable asset to Fortress Power. Whether addressing technical inquiries or guiding customers through product solutions, she consistently delivers exceptional service. I highly recommend working with her for anyone in need of reliable and efficient energy storage solutions! It’s a ⭐️⭐️⭐️⭐️⭐️ Company! Ron ZanottiMarch 4, 2025Trustindex verifies that the original source of the review is Google. I had a BMS issue in one of my 2 eVault Classic subsystems causing a deep discharge and total outage on it. When I recognized the outage, I sent a email to Fortress technical support where it was quickly responded to by one of their techs Luis. What made the experience a 5 star rating is that Luis responded quickly and was genuinely concerned about getting my system fixed quickly and correctly. He inquired daily about whether their local reseller was responding to my satisfaction. You don’t see that level of concern from vendors much any more. And guess what, the reseller did a phenomenal job restoring my system to 100%! Thank you Fortress support!
Financing Partners
We have partnered with trusted financing providers making it easier than ever to invest in energy storage solutions. Our financing partners are committed to helping you achieve energy independence and sustainability without compromising your budget.






