February 5, 2026

Your Customers’ Lead-Acid Batteries Are Failing — Here’s the Better Replacement

A Modern Upgrade Path for Legacy Inverter Systems

For years, lead-acid batteries paired with legacy inverter platforms were the backbone of off-grid and backup power systems. But today, a massive wave of those batteries is reaching end of life — creating a critical replacement moment for system owners and installers alike. Instead of repeating outdated technology cycles, there is a better path forward. Fortress Power’s eBoost scalable energy storage system provides a seamless, high-performance replacement for lead-acid batteries while maintaining compatibility with many of the industry’s most widely deployed inverter platforms.

The Lead-Acid End-of-Life Wave Is Here

Across residential, off-grid, and light commercial installations, lead-acid batteries are failing at scale. Many systems installed 5–10+ years ago are now experiencing:

Reduced capacity and runtime
Frequent maintenance requirements
Voltage instability and performance degradation
Increased system downtime and replacement costs

For installers, this presents both a challenge and an opportunity: customers need battery replacements now and they are open to better technology.

Why Replacing Lead-Acid with Lithium Makes Sense

Lead-acid batteries were once the standard, but lithium iron phosphate (LFP) chemistry has redefined what energy storage can deliver. When replacing lead-acid with eBoost, system owners gain:

Higher usable capacity in a smaller footprint
Longer cycle life and improved longevity
Stable voltage performance across loads
No watering, equalizing, or routine maintenance
Faster charging and deeper usable discharge

For installers, that translates into fewer service calls, simpler system design, and stronger long-term reliability.

Designed to Work with Legacy Inverter Platforms

Many existing systems were built around inverter brands that defined the early solar and off-grid market. eBoost was designed with these real-world installations in mind. eBoost can be integrated into systems built around:

Schneider Electric
OutBack Power
Magnum Energy
Victron Energy

These platforms were once the go-to choice for lead-acid systems, and many are still operating today. eBoost allows installers to modernize battery storage without requiring a full system rip-and-replace, preserving existing infrastructure while delivering a major performance upgrade.

A Smarter Upgrade Path for Existing Systems

Replacing lead-acid batteries often triggers bigger questions from system owners:

“Is it time to upgrade?”
“Do I need to replace everything?”
“Can my inverter still work?”

eBoost provides a clear, installer-friendly answer: Upgrade the batteries. Improve performance. Keep what still works. This approach minimizes disruption while extending system life — a compelling value proposition for customers hesitant to overhaul their entire energy setup.

Built for Installers, Not Just End Users

eBoost was engineered with installer workflows in mind. From physical handling to system integration, it supports faster deployment and cleaner retrofits compared to bulky lead-acid banks. Installers benefit from:

Simplified system expansion and scaling
Reduced labor time compared to multi-battery lead-acid banks
Cleaner electrical layouts and modern battery management
A long-term storage solution aligned with today’s performance expectations

As the industry moves forward, continuing to install lead-acid replacements only delays the inevitable upgrade conversation. eBoost helps installers lead that conversation with confidence.

The Right Time to Upgrade Is Now

The industry is at a turning point. As lead-acid batteries reach end of their service life, installers who offer a lithium replacement strategy position themselves as trusted advisors — not just service providers.

eBoost delivers a modern, reliable, and future-ready replacement for aging lead-acid systems, while maintaining compatibility with many of the inverter platforms that defined the last generation of energy storage.