Gain Grid Independence
Save $500 on the eVault Max 18.5 kWh Battery
Create your future with renewable Fortress Power Energy Storage. Whether you are looking to go off-grid with Solar and Battery storage or interested in adding Battery Storage to an existing PV system, one of our certified installers can help.
- Off-Grid Living
- Power Outage Protection
- Reduce Peak Charges
- Zero Grid Export
- Largest Residential Battery on the Market
- Latest Lithium Iron Phosphate technology (UL 1973 and UL9540 certified)
- Expandable from 18.5 kWh to 370 kWh
- Local monitoring via Large LCD display
- Closed-Loop Communication with hybrid inverters via smart Digital Process Based Battery Management System (BMS)
- Competitively priced and easy to install with > 98% round-trip efficiency
- Optimized internal structure makes for easy installation and serviceability
- AC/DC coupling to existing and new PV systems
- 10-year warranty
*$500 offer valid through 12/31/2022.
$500 eVault Max 18.5
Get a Quote Today
Get a quote today for smart, clean energy storage from Fortress Power
Fortress Power
Advantage
We’re confident that we’re a good fit for your energy storage needs; see for yourself.
Contact us to learn more about our innovative, personalized storage solutions that grows and fits into your lifestyle.
Latest Technology
We use the safest,
environmentally friendly
LiFeP04 technology.
All-in-One Solution
Smart energy management system supports multiple applications.
Lowest Energy Cost
Competitively priced, easy
to install,
and high round-trip
efficiency.
Long Lasting
10 year warranty up to
6,000
cycles.
Why Choose Fortress Power?
Fortress Power products use the latest cell technology that provides higher efficiency and a longer life span than other systems. The chart below compares the Fortress Power Lithium Iron Phosphate solution to other systems on the market.
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 |
