Our Vision
To empower individuals, families, and businesses with clean, reliable energy storage solutions that create a more resilient and sustainable world.
Our Mission
To deliver safe, high-performance solar battery systems that reduce energy costs, protect against power outages, and accelerate the transition to renewable energy—backed by industry-leading support and long-term reliability.
About Us
Reliable Solar Energy Storage for a Stronger Future.
From everyday home energy savings to large-scale commercial and industrial resilience, Fortress Power provides the advanced energy storage systems needed to build smarter, more reliable power infrastructure. Our solutions deliver clean energy, dependable backup, and long-term performance—empowering customers of every size to take control of their energy future.
500+
Installer Partners
100+
Distributor Partners
50,000+
Projects Worldwide
Why Choose a Solar Energy Storage System?
Lower Energy Costs With Solar + Storage
A modern energy storage system lets you store excess solar energy during the day and use it when utility rates are highest, dramatically reducing monthly electricity bills and boosting the value of your solar investment.
Sustainable, Clean Energy for Your Home or Business
Storing and using your own solar power reduces your reliance on fossil fuels, cuts carbon emissions, and accelerates your path toward a clean, renewable energy lifestyle.
Reliable Backup Power for Outages
A home battery backup system keeps your lights on, appliances running, and critical circuits powered during blackouts—providing seamless protection from storms, grid failures, and increasingly unstable utility infrastructure.
Energy Independence On or Off the Grid
Whether you’re looking for true off-grid capability or simply greater day-to-day control over your home’s power, an energy storage system gives you long-term energy resilience, freedom, and peace of mind.
Resources for Every Step of Your Energy Journey
Whether you’re installing a new Fortress Power system or exploring clean energy solutions for your home, our resource center gives you quick access to the tools, guides, and support you need.
Installers
Access detailed installation guides, data sheets, wiring diagrams, and technical documents for every Fortress Power product.
Need assistance? Submit a support ticket and our engineering team will help you diagnose, troubleshoot, or configure your system.
Read expert articles on system design, product updates, best practices, and industry trends to stay ahead in the solar + storage market.
System Owners
Explore preconfigured solutions that show exactly what different battery and inverter packages can power in your home.
Learn about our industry-leading warranty and extended coverage options—designed to protect your investment for decades.
Use our interactive tool to estimate your energy needs, size your system, and discover the right Fortress Power solution for your home.
Locate authorized Fortress Power installers and dealer partners near you for professional system design, purchase guidance, and expert installation.
Newest Residential Products
eBoost Scalable Energy Storage System
The eBoost is a 16kWh stackable LFP battery designed for seamless integration with the Fortress Power Envy Duo 21 inverter — delivering reliable, scalable backup and off-grid energy.
eForce Stackable Whole-Home Energy Storage System
Pairing powerful 9.6 kWh LFP batteries with the Envy Inverter, eForce delivers a flexible, stackable solution for backup power, off-grid living, and energy independence.
Solo 6.5K Non-Export Inverter
The Fortress Power Solo 6.5K is a powerful and flexible 6.5kW split/single-phase hybrid inverter designed for off-grid living, backup power, and grid-tied solar systems.




Now Available to Download
Two Apps. One Powerful Energy Ecosystem.
The Fortress Power Owner and Pro apps give homeowners and installers the right tools to monitor, manage, and support Fortress Power systems, anytime, anywhere.
* Available for download on the App Store and Google Play Store as of April 6, 2026.
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 businesses.
I have been loving the Envy and eVault MAX/eFlex combo. Gary of Fortress Power tech support, absolutely has been the best. He is knowledgeable, patient, and just amazing in helping me commission systems and answering any answer that may come up. Wish I had him on speed dial 24/7. Great overall product and team, thanks!
Steven N, Installer
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 Fortress.
Mark
Quality home and commercial American battery manufacturer. They attract talent within their company and are led by a strong management team.
Andrew Breiter-Wu
Posted on jonny alfredo castilloApril 9, 2026Trustindex verifies that the original source of the review is Google. En Tecnosol Honduras hoy realizamos la instalacion por priera vez de 2 Envy 12 con 4 Baterias eBoost de Fortress Power, donde gracias a la ayuda del Ing. Omri Carrasco pudimos tener un comisionamiento exitoso, Gracias por todo el apoyo brindado en esta instalacion.Posted on Itay KleinApril 6, 2026Trustindex verifies that the original source of the review is Google. I only gave this company 5 stars cause 10 stars wasn’t available.I bought a food truck with a solar system that had fortress power lithium batteries. 2 of my batteries were not charging. I have called the company technical support and that was the best technical support I have ever received. Saul the technician was so patient and took his time to trouble shoot the system over the phone. Sent me links to buy what I needed and pictures with how to replace components and connect special charger to bring the batteries back to $48V so they can charge by the solar system. I’m so impressed to a point that I’m replacing the batteries at my other truck to fortress power Evault Max. It took a week where Saul was following up and checking on me every day. Throughly amazing service. Thank you Saul for all your helps. Can’t thank you enough. I’m going to recommend them to all my friends here on.Posted on Jacqueline BaltazarApril 1, 2026Trustindex verifies that the original source of the review is Google. Recibiendo atención de calidad por parte del ingeniero Omri Carrasco, contando con mucho profesionalismo, eficacia durante la puesta en marcha de inversores envy y baterías eflex max, siendo un proceso muy interesante por toda la información aportada por el ingeniero, un gusto recibir su apoyo.Posted on Michael HoytMarch 29, 2026Trustindex verifies that the original source of the review is Google. After my Envy 12 with 2 batteries was installed, we had a problem getting the Peak-Shaving option to work properly. The solution required an upgrade to the firmware that allowed the sytem to be set to off-grid during user specified periods. Omri Carrasco was extremely helpful during the trouble-shooting process and worked closely with me to find and implement the solution. I couldn't be happier with my Fortress Power installation.Posted on Vicki DayMarch 19, 2026Trustindex verifies that the original source of the review is Google. I’ve been thoroughly impressed over the past two years since my Fortress 5.4 battery system was installed with a Sol-Ark inverter, especially with the support from Fortress. My original installer unfortunately botched the installation, but Fortress, Sol-Ark, and the new installer have all been incredible in resolving the issues. My most recent call was with Saul (FP), who was extremely easy to work with. He quickly corrected the issue and reassured me that if anything else comes up, I can simply reach out to him directly. Kudos to Saul and Fortress for delivering truly outstanding customer service, even long after the sale is complete.Posted on George ArthurMarch 18, 2026Trustindex verifies that the original source of the review is Google. I recently needed information from Fortress to recalibrate the state of charge to the battery voltage on my inverter. The prompt, knowledgeable assistance I received from Christopher allowed me to quickly resolve my issue. I wish all firms had such outstanding technical support.Posted on Richard RoserMarch 18, 2026Trustindex verifies that the original source of the review is Google. I'm aPV/Battery installer. Saul Navarro was very helpful with getting me connected to the batteries, and helping to check the FW. He even noticed the batteries I was working with were a bit out of calibration. He took the time to update them and get my system squared awayPosted on Eugene HoekendorfMarch 18, 2026Trustindex verifies that the original source of the review is Google. I have had the Fortress Envy Electical system for about 1.5 years. I had a problem where we lost power. It came back on automatically , however it kept rebooting. I contacted support and was connected to Omri Andres. It was after hours no less, and he was doing it from home. Although I am in Mexico, Omri was able to walk me thru checking the voltage of the batteries and rebooting the system in English. Which resolved the issue I was experiencing. Omri was able to explain everything in perfect english in a very simple easy to follow manner. All while it was raining and at night. Thank you for helping return everything to normal.Posted on Alberto AguilarMarch 18, 2026Trustindex verifies that the original source of the review is Google. Muy satisfecho con el excelente servicio de soporte técnico de Fortress Power México sin dejar atrás la alta tecnología que ofrecen en toda su línea, con un optimo desempeño y arquitectura energética, así como la ingeniería de potencia con la que cuentan los equipos y sistemas desde pequeña a gran escala. Aprovecho la oportunidad para agradecer al Ingeniero Omri Carrasco quien me ha brindado un gran soporte y resaltando en especial que no importando la hora me ayudo con un cliente a resolver un tema técnico de urgencia. Tanto el cliente como un servidor quedamos mas que satisfechos. En Elirmex diseñamos e integramos solo con fabricantes confiables que demuestran en su innovador y constante desarrollo de tecnología estar a la vanguardia del actual creciente e importante sector de la continuidad energética, así que Fortress Power y todo su equipo de ingeniería seguirán siendo referentes en esta gran industria energética.
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