July 2025
Why Smart Homeowners Are Choosing eForce for Energy Independence
When the power goes out, will your home be ready? As extreme weather events and utility outages become more common, more homeowners are turning to battery energy storage systems (BESS) to protect their homes—and their peace of mind. But not all systems are created equal. Fortress Power’s new eForce stands out as a next-generation solution built for real-world reliability, performance, and long-term value. Here’s why eForce is the smarter choice for modern homeowners.
Reliable Power, Rain or Shine
Unlike some systems that struggle in extreme conditions, eForce is outdoor-rated and built to handle the elements. Whether you’re facing sweltering summers, icy winters, or sudden blackouts, the system’s weatherproof enclosure and built-in temperature regulation keep it running smoothly.
Long-Term Value with LFP Technology
At the core of eForce is Lithium Iron Phosphate (LFP) chemistry—renowned for safety, longevity, and stability. Each battery module is rated for 8,000+ cycles, delivering years of reliable backup power with minimal degradation. That means fewer replacements, fewer worries, and more money saved over time.
Scalable for Your Needs
Whether you want to power a critical circuit or your entire home, eForce grows with you. Start with one 9.6kWh battery module and scale up to 153kWh as your energy needs evolve. Thanks to its stackable, modular design and Wireless Quick Plugs, expanding your system is as easy as plugging in a new battery—no rewiring or complicated upgrades required.
Earn Revenue with VPP Support
In select regions, eForce doesn’t just save energy—it can make you money. With Virtual Power Plant (VPP) compatibility, homeowners can participate in grid-support programs that compensate you for storing and supplying energy when demand spikes. Your battery becomes a smart financial asset, not just a backup plan.
Built for Fast, Simple Installation
A sleek system shouldn’t come with installation headaches. Fortress Power designed eForce with homeowners and installers in mind. The eWay wireway system, built-in conduit ports, and bolt-on inverter design mean your system is up and running faster—with less time, labor, and disruption to your home.
Ready to Take Control of Your Energy Future?
Whether you’re preparing for outages, lowering your electric bills, or stepping into off-grid living, eForce puts control, savings, and security in your hands. Backed by Fortress Power’s trusted performance and next-level engineering, it’s not just a battery—it’s your energy independence plan. Learn more about eForce and request a quote today.
Title 24 and Battery Storage: How California C&I Properties Can Comply, Save, and Thrive
California continues to lead in clean energy policy, with Title 24 as a key driver of change. For commercial and industrial (C&I) property owners, these codes are more than compliance—they’re a strategic way to reduce costs, boost resilience, and support a cleaner grid.
At Fortress Power, we help California businesses turn compliance into competitive advantage with advanced, scalable battery energy storage (BESS) systems designed for seamless solar integration.
What Is Title 24 — and Why Does It Now Require Energy Storage?
Title 24 is California’s Building Standards Code that sets energy efficiency regulations for residential and non-residential buildings. Recent code updates focus on reducing grid demand, lowering emissions, and expanding the use of renewable energy — especially in commercial applications.
One key outcome: solar and battery storage systems are now required in many new nonresidential construction projects, especially those ≥10,000 square feet. Buildings like offices, schools, warehouses, retail spaces, and restaurants must be “solar ready” and often must include onsite storage to help manage peak loads and support grid reliability.
How Title 24 Affects Solar and Battery System Sizing
Title 24 doesn’t prescribe a one-size-fits-all solar system. Instead, PV sizing is based on the building’s expected energy usage through performance modeling.
- Mandatory Solar Ready: Most new nonresidential buildings ≥10,000 ft² must allocate at least 15% of available roof area (after accounting for skylights, HVAC, etc.) for solar and energy storage equipment.
- Modeled Offset: Using approved simulation tools (like CBECC-Com or EnergyPro), designers determine the appropriate PV size to offset a portion of the building’s annual electricity load.
Battery Storage Requirements: If PV is required, battery storage is often mandatory. This is unless the project qualifies for an exemption.
- Battery Sizing Formula: Title 24 requires energy storage systems to meet the lesser of 5 kWh of storage per 1 kW of PV installed. Or, the building’s expected peak demand.
- Minimum Discharge Power: Batteries must support a 25% discharge rate. Meaning, a 40 kWh system must deliver at least 10 kW.
Together, these sizing guidelines ensure that buildings have the capacity to store excess solar generation and shift load to off-peak hours, easing demand on the grid and lowering utility costs.
Why Battery Storage Is a Smart Investment for California Businesses
Adding a commercial battery storage system doesn’t just help with Title 24 compliance — it also delivers long-term operational and financial benefits:
- Peak Demand Management: Reduce utility bills by storing energy during off-peak hours and using it during peak pricing periods.
- Backup Power During Outages: Ensure energy continuity during grid disruptions, blackouts, and wildfire-related shutoffs.
- Sustainability Leadership: Support your ESG goals by lowering emissions and increasing reliance on clean, onsite power.
- Incentives & Rebates: State and federal programs can significantly boost ROI and reduce payback periods.
Fortress Power: Trusted Solutions for Compliance and Resilience
Fortress Power designs energy storage systems that help California businesses meet Title 24, improve performance, and achieve energy independence. Our solutions are safe, scalable, and solar-ready.
eSpire 280- C&I Storage Without Compromise: Our eSpire system is a high-capacity, lithium iron phosphate (LiFePO₄) solution engineered for large commercial and industrial buildings. Ideal for:
- Peak shaving and demand charge reduction
- Backup power and resilience
- Solar + storage integration
- Multi-site energy strategies
eVault MAX- Mid-Sized Power for Flexible Applications: The eVault MAX is a flexible solution for retail spaces, schools, and medium-sized facilities. It offers:
- High round-trip efficiency
- Long cycle life
- Scalable performance for time-of-use savings and Title 24 compliance
Guardian App- Smart Energy Management in Real Time: All Fortress Power systems integrate with our Guardian App, enabling building managers to monitor usage, track system performance, and configure dispatching based on real-time energy needs—from anywhere.
Take the Next Step Toward Title 24 Compliance
Title 24 is reshaping how California businesses think about power. Fortress Power helps you stay ahead with storage solutions that cut costs, reduce risk, and support sustainability. Contact our experts to size your system, ensure compliance, and thrive in California’s evolving energy landscape.
Why eForce is the Top Choice for Whole-Home Battery Storage
As the demand for energy independence and backup power grows, more homeowners and businesses are investing in reliable energy storage solutions. Enter the eForce Stackable Energy Storage System — Fortress Power’s latest whole-home battery solution, engineered for performance in any condition.
Whether you’re installing a new solar + storage system or upgrading an existing setup, eForce delivers clean, reliable, and scalable power for grid outages, daily energy use, and off-grid living. With flexible configuration options, long-lasting durability, and a robust warranty, eForce is built to meet the demands of today’s evolving solar energy and backup power needs.
Built to Power Your World — Anytime, Anywhere
At the core of the eForce system is a 9.6 kWh lithium iron phosphate (LFP) battery — chosen for its automotive-grade performance, fast-charging capability, and 8,000+ cycle lifespan. Designed to last up to 20 years, it’s ideal for:
- Whole-home backup
- Off-grid living
- Solar self-consumption
- Light commercial or small retail operations
Each battery module can be stacked vertically with up to three units. It can also expand laterally to 268.8 kWh. This makes it a great choice for a single-family home or a small business.
Smaller Design Means Faster Installs, Lower Costs
The eForce system stands out with its streamlined, cable-free design—one of its most powerful advantages. Installers can stack batteries using quick-connect plugs, eliminating the need for wireways or long cable runs. The result: faster installs, reduced labor, and less system complexity. The eWay smart wireway simplifies integration even further, featuring built-in busbars, conduit ports, real-time LED indicators, and an emergency shutoff. To complete the system, the Envy Inverter mounts directly on top. This creates a compact, weather-resistant energy tower, delivering both clean aesthetics and reliable performance.
Built for the Toughest Conditions
Designed for all-weather durability, the eForce features an IP65-rated enclosure and integrated heating elements, making it ideal for both indoor and outdoor use. Built to perform in extreme temperatures and harsh environments, it’s a reliable solution for homeowners in hot or cold climates alike.
Code-Compliant and Aesthetically Clean
The eForce doesn’t just work smart — it looks smart too. Its modern, compact enclosure is designed to blend seamlessly into a home or facility, while staying code-compliant with NEC and NFPA standards. That means flexible placement options with minimal visual impact.
Scalable, Flexible, and Ready for the Future
Need to start small and scale later? No problem. Each eForce system is modular by design. This allows for seamless expansion as energy needs grow. Start with a basic stack and expand up to 268.8 kWh across multiple units, all while maintaining compatibility with Fortress Power’s robust monitoring app for real-time oversight and performance analytics. Even better, eForce is VPP-ready. This means customers can participate in Virtual Power Plant programs and potentially earn revenue while supporting grid stability through intelligent energy discharge.
Long-Term Peace of Mind with Industry-Leading Warranty
Your investment is protected with a 15-year standard warranty, plus an optional 30-year extended coverage — one of the longest in the industry. With Fortress Power, you don’t just get energy storage. You get confidence, performance, and long-term value.
Ready to Take Control of Your Power?
Whether you’re preparing for outages, living off-grid, or simply looking to maximize your solar investment, eForce gives you the freedom and flexibility to power your home — your way. With its advanced design and seamless integration, eForce adapts to your lifestyle and energy goals. Ready to take control of your power? Contact us today.
