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.
