Power Outage Protection
Keep the Lights On When the Grid Goes Down
From hurricanes and wildfires to aging utility infrastructure, power outages are more frequent and unpredictable than ever. Fortress Power energy storage systems are designed to keep your home or business running smoothly during grid failures — without the noise, fuel, or maintenance of a traditional generator.
How It Works
When the power goes out, your Fortress Power battery system automatically kicks in to supply backup power to essential appliances, lights, and devices. Whether you’re backing up a few critical loads or your entire home, our scalable systems ensure you stay safe, connected, and comfortable.
Backup What Matters Most
A Fortress Power system can keep the following running during an outage:
💡Lights and outlets
🛜Wi-Fi and routers
🍅Refrigerators and freezers
💧Sump and well pumps
💊Medical devices
🖨️Home office equipment
🔐Garage doors and security systems
Larger systems can power HVAC, EV chargers, and even full homes — speak with a Certified Installer to customize your setup.
Why Fortress Power for Backup Energy?
Automatic, seamless switchover during outages
Modular design — back up a few circuits or your whole home
Reliable LFP chemistry — safe, long-lasting performance
U.S.-based support and industry-leading warranties
You may wonder why your solar system shuts off when the grid goes down. During power outages, the utility grid also mandates solar systems to turn off. This prevents the ability of your solar system to feed power to the grid and to your home/business. A solar storage battery system can automatically isolate your solar system from the grid and will keep your family and business up and running.
Why Backup Power Matters More Than Ever
Power outages are becoming more frequent, longer-lasting, and more dangerous.
In September 2024, Hurricane Helene left over 1.6 million homes in Florida and 1.3 million in South Carolina without electricity — some for over a week.a
In January 2025, utility-initiated shutoffs during the California wildfires impacted more than 400,000 customers, disrupting lives and businesses across the state.b
And in February 2021, a historic winter storm in Texas caused 14.5 million people to lose power — contributing to over 700 deaths.c
These extreme events are no longer rare. Losing power for even a few hours can quickly become a serious risk. According to the FDA, refrigerated food can spoil in just 4 hours during an outage, and frozen food may not last more than 24–48 hours without a properly functioning freezer. Beyond food loss, lack of power can affect access to water, heating, medical equipment, and communications — all critical for safety and wellbeing.d
STAY ONLINE
Why Choose Fortress Power?
Features | Fortress Power Solution | Other Lithium-ion Solutions
| Lead Acid | Generator |
|---|---|---|---|---|
| Applications | Backup Power, time of use, self-consumption, and off-grid | Backup Power, time of use, self-consumption, and off-grid | Backup Power | Backup Power |
| Depth of Discharge | 100% | 100% | 50% | N/A |
| Battery Chemistry | Safe Technology | Potential thermal runway or firing | Risk of harmful gasses | Environmental Pollution |
| Life Cycles | 8,000+ (15+ years) | 3,000 | 500-1,000 | N/A |
| Warranty | 10 years | 10 years | 6 months | 2 years |
| Fuel cost | $0 | $0 | $0 | $70-$130 per day |
| Maintenance | No | No | Every 6 months | Yes |
| Energy Cost ($/kWh) | 0.14 | 0.30 | 0.65 | 0.50 |
