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Fortress Power

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Fortress Power provides smart fully integrated Lithium battery energy storage systems for residential, commercial and industrial sectors. Our mission has been providing homes and businesses easy access to affordable clean energy, while improving the grid resilience for all. With 25,000+ installs throughout North and South America since its inception in 2017, Fortress Power earns its reputation of being a leading energy storage provider in the market. Our proprietary energy management system enables the energy storage at customers' sites to Virtual Power Plants (VPPs) to receive rebates for energy services. Fortress’ corporate office is in Langhorne, Pennsylvania with multiple offices and distribution centers throughout the United States, Canada, Latin America, and Asia.
Fortress Power logo
eFlex 5.4kWh
eVault Max 18.5 kWh
FlexTower
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4.0
Avg rating
4.0
Avg rating
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About Fortress Power

Overview

Fortress Power provides smart fully integrated Lithium battery energy storage systems for residential, commercial and industrial sectors. Our mission has been providing homes and businesses easy access to affordable clean energy, while improving the grid resilience for all. With 25,000+ installs throughout North and South America since its inception in 2017, Fortress Power earns its reputation of being a leading energy storage provider in the market. Our proprietary energy management system enables the energy storage at customers' sites to Virtual Power Plants (VPPs) to receive rebates for energy services. Fortress’ corporate office is in Langhorne, Pennsylvania with multiple offices and distribution centers throughout the United States, Canada, Latin America, and Asia.
Year Established
2016
Phone Number
(877) 497-6937
Reasons Why You Should Work With Us

  1. We provide best in class technical support 7 days a week.

  2. We provide smart fully integrated storage systems for both homes and businesses.

  3. We offer indoor and outdoor energy storage solutions for both residential and commercial applications with over 25,000 installs.

We speak

Chinese; English; German; Spanish

Services Offered

  • Manufacturing

Workmanship Warranty

10 Year Warranty

Certifications

UL 1642, UL 9450, UL 9540A, UL 1973

Industry Certifications

  • Colorado Solar Energy Industries Association
  • North American Board of Certified Energy Practitioners
  • Solar Energy Industries Association

What Customers Are Saying

Ratings & Reviews

4.0
5 reviews
4.0
Average Rating 5 review(s)
Response
4.0
Quality
4.0
Value
4.0
Service
4.0
Leave a Review
Great Company for Installers and Clients

We been installing Fortress Power for 5 years. Specifically the Evault Max. It has been our GoTo battery storage option at Palm Tree Energy. We use their battery in our homes. It’s 18.5KW or 360AH can meet the demand of most homes during the 4pm to 9pm Peak usage period. Need more storage, simply double up or triple up. Install it and forget it. They were one of the first to adopt the UL9549 which was required in San Diego, CA about 4 years ago. That means they had to work closely with inverter manufacturers to get this accomplished. They also adopted changes to help us install more efficiently reducing cost to the end user. They continue to upgrade and adapt to the existing market demands. Great company!

Posted by solarterminal on Sep 12, 2023
Many installations later... working great.

Having installed 8 eVaults as well as 11 eFLEX's so far, they seem to be doing great. Ease of Installation has been a big plus.

Posted by John.blittersdorf on Feb 06, 2023
Excellent line of renewable energy storage products

Fortress batteries are an excellent alternative for renewable energy product storage solutions.

Posted by aslaughter on Sep 08, 2022
Oh, you will need a laptop and Fortress will send flash drive to reprogram failed Eflex.

New product replete with flaws! Fortress is well aware of failure issues, yet they continue selling a flawed product.

Posted by hpowermark on May 04, 2022
Amazing Products and Service!

High-quality batteries along with fantastic technical support. Fortress Power is the best!

Posted by emmcbain95 on Jul 30, 2021

    • Energy Storage
    • 21.6 kW
    Sol-Ark 12 kwh Hybrid Inverter with Fortress Eflex (21.6 kwh total) lithium batteries
See All Stories (1)

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