September 2025

Become a Fortress Power Certified Installer & Unlock Dealer Discounts

If you’re a solar or storage professional looking to grow your business, there’s never been a better time to partner with Fortress Power. Our Certified Installer Program is designed to give you the training, tools, and support you need to succeed in today’s fast-growing energy storage market. And for a limited time, new installers can take advantage of an exclusive offer.

Why Get Certified with Fortress Power?

At Fortress Power, we don’t just deliver industry-leading lithium iron phosphate (LFP) energy storage solutions. We deliver a partnership that helps you thrive. Becoming a Certified Installer connects you with a trusted U.S.-based manufacturer and provides you with benefits designed to grow your business.

Discounted Training- As a Certified Installer, you’ll gain access to exclusive pricing on Fortress Power products. Plus, we’ll connect you with Authorized Distributors in your area to streamline your ordering and installation process.

Training & Technical Support- Access our Training Portal, complete with NABCEP CE courses and in-depth product training. Our Applications Engineering team provides world-class technical support, available seven days a week. So, you’re never left without answers on the job.

Leads for Installations- We’ll send you leads from homeowners & businesses who are interested in using Fortress Power batteries. With more customers looking for reliable energy storage, our network helps bring projects directly to you.

Co-Marketing Opportunities- Grow your visibility with our co-marketing program. This includes merchandise, advertising strategies, and promotional tools designed to highlight your expertise as a Fortress Power partner.

How to Become A Certified Installer
Getting started is simple:

Step 1: Submit your online application to become a Fortress Power Installer.
Step 2: Complete our Certified Installer Training Program, covering products, installation, and support.
Step 3: Kickstart your partnership with confidence.                                                                                                                                                                                                  
Redeem your 10% discount on your first Fortress Power ESS purchase before December 31, 2025. 
Once your first project is complete, submit the product warranty and finalize onboarding. 
You’ll officially join our growing network of trusted partners.

Energy storage is no longer optional. It’s essential. By becoming a Fortress Power Certified Installer, you’ll gain a competitive edge with:

Industry-leading products backed by up to a 30-year warranty
U.S.-based support available seven days a week
Exclusive training, marketing, and sales opportunities

Now is the perfect time to join our network and take advantage of this limited-time offer. Apply today to become a Fortress Power Certified Installer and save 10% on your first ESS purchase. Offer valid through 12/31/25. U.S. and Canada customers only.

Power More, Spend Less: Fortress Power’s New Dynamic Duo

Blog, Solar Batteries

This fall, Fortress Power introduces two new innovations within its 48V lineup: the eBoost Scalable Energy Storage System and the Envy Duo 21 Hybrid Inverter. Together, they form a dynamic duo designed to deliver more power and greater system flexibility—while lowering installation time and overall project costs.

For homeowners, businesses, and installers alike, this pairing represents a smarter way to design energy systems that grow with your needs.

eBoost: Scalable, Reliable Energy Storage

The Fortress Power eBoost is a 16kWh stackable LFP battery built for whole-home backup, off-grid living, and light commercial applications. With scalability, durability, and seamless integration at its core, the eBoost makes dependable energy storage simple.

Key Highlights:

16kWh capacity per module – designed for higher load demands
Expandable to 256kWh – connect up to 16 units in parallel
Integrated eWay Wireway system – faster, code-compliant installs
IP65-rated with internal heaters – reliable all-weather performance
Modular design – reduces install time and labor
Whole-home compatibility – engineered to pair with the Envy Duo 21

The result? A system that’s as easy to expand as it is to install, without sacrificing long-term performance.

Envy Duo 21: The Hybrid Inverter with More Flexibility

The Envy Duo 21 is Fortress Power’s most versatile 48V hybrid inverter, engineered for high-performance residential and light commercial projects. With its robust PV input and parallel scalability, it’s built to handle today’s demanding energy applications.

Up to 25kW PV input capacity
12kW continuous / 16kW peak output
Parallel up to 10 units for 120kW total power
Built-in AC/DC breakers and rapid shutdown transmitter
Remote monitoring and firmware updates via the Fortress Power mobile app
Dual-phase operation – 240V split-phase or 208V three-phase (minimum of 2 inverters for 3-phase)

By combining flexibility with advanced monitoring, the Envy Duo 21 gives installers and system owners full control over their energy.

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Why This Pairing Works
The eBoost and Envy Duo 21 are powerful on their own—but together, they create a dynamic solution that redefines scalability and value in the 48V energy storage space.

Streamlined installs: Integrated wireway and built-in breakers simplify system design.
Scalability without limits: From 16kWh to 256kWh of storage, and from 12kW to 120kW of output.
Whole-home backup and beyond: Ideal for residences, retail spaces, and small commercial facilities.
Lower project costs: Modular hardware reduces labor and speeds deployment.
Built to grow: Expand capacity and performance as energy needs evolve.

Fortress Power’s new dynamic duo, the eBoost scalable battery & Envy Duo 21 hybrid inverter, will be available this fall. With this pairing, energy independence becomes more attainable, more scalable, and more reliable than ever before. Contact our team today to learn more and see how Fortress Power can transform your next project.

Fortress Power Warranties: Long-Term Protection for Your Energy Investment

Blog, Solar Batteries

When you invest in an energy storage system, you’re committing to a future of energy independence. Your warranty should give you the same peace of mind. At Fortress Power, every product we make is backed by industry-leading coverage designed to protect your investment for the long haul. From our standard 10-year warranty to extended options lasting up to 30 years, you can count on long-term reliability and support.

Why Warranties Matter in Energy Storage

A high-quality energy storage system should perform reliably for years. A strong warranty ensures your system stays protected against manufacturing defects, unexpected failures, and even long-term performance issues. At Fortress Power, we go beyond the basics with coverage options that fit your unique needs—whether you’re powering your home, business, or large-scale project.

Fortress Power Warranty Options

Here’s an overview of our warranty options and what they cover:

Warranty Term	Coverage Highlights	Best For
10-Year Standard	Factory warranty covering defects in materials and workmanship for batteries and inverters. Applies to residential and C+I products.	Homeowners and businesses seeking reliable standard coverage.
15-Year Standard	Adds 5 extra years of coverage on eForce batteries when installed as part of a full eForce ESS (with Envy inverter & Guardian Gateway).	Owners who want mid-term security on integrated systems.
25-Year Extended	Extended coverage for select 48V Fortress Power batter	Long-term protection for those committed to the Fortress Power 48V product line.
30-Year Limited (Solar Insure)	In collaboration with Solar Insure, get comprehensive coverage including parts and labor.	Homeowners and businesses looking for maximum peace of mind.

10-Year Standard Warranty

Every Fortress Power battery and inverter comes with a 10-year parts-only warranty, provided it’s installed by a certified installer. This warranty covers:

Manufacturing defects
Workmanship issues
Performance within expected capacity thresholds

Commercial and Industrial (C+I) products like our eSpire series are also backed by this same 10-year standard warranty. Technical support is included during the warranty term for additional peace of mind.

15-Year Extended Warranty (eForce ESS)

Want even more protection? When you install a complete eForce Energy Storage System—including the Envy inverter, eForce battery, and Guardian Gateway—you qualify for an extended 15-year warranty on the eForce battery. This coverage includes:

Up to 15 years or 8,000 discharge cycles at 80% DoD (whichever comes first)
Transferable warranty for new homeowners
Exclusive to certified installations

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25-Year Extended Warranty (Select 48V Products)

Select 48V Fortress Power batteries and inverters can be covered for 25 years with an extended warranty option. This demonstrates our commitment to the durability and longevity of our products. Eligibility requires:

Certified installation
Proper product registration
Compliance with maintenance guidelines

30-Year Warranty with Solar Insure

For the ultimate protection, Fortress Power offers an industry-leading 30-year warranty through Solar Insure. This optional coverage goes far beyond the standard manufacturer warranty and includes:

Parts and labor
Transferability
Comprehensive protection for eligible systems

To qualify, system must include eligible Fortress Power products (Envy Inverters, eForce Batteries, eVault MAX, eFlex MAX). Installation must be completed by a Solar Insure certified installer, with timely registration through Solar Insure.

Which Warranty Is Right for You?

Your energy system is a long-term investment. Whether you’re a homeowner looking for standard coverage, a business seeking extended protection, or someone who wants the industry’s most comprehensive plan, Fortress Power has a solution:

Standard Coverage (10 Years): Reliable protection from day one.
Extended Options (15–25 Years): Added security for long-term reliability.
Solar Insure (30 Years): Maximum coverage for parts, labor, and transferability.

Secure Your Investment Today

Fortress Power’s warranty options give you the confidence to plan for a future of clean, dependable energy. Ready to protect your system for decades to come? Contact us today to learn more about our extended warranties and find the right plan for your needs.