Fortress Power | eVault Max 18.5kWh LFP Battery
eVault Max 18.5kWh LFP Battery – Fortress Power
The eVault Max 18.5kWh LFP Battery from Fortress Power is a next-generation lithium iron phosphate (LiFePO4) energy storage solution built for both residential and commercial applications. Offering exceptional performance, safety, and scalability, this advanced battery system can be expanded up to 370 kWh, making it ideal for everything from small homes to large-scale energy projects.
Designed with AC/DC coupling for seamless integration with solar arrays, the eVault Max supports Off-Grid, Backup Power, Self-Supply, and Peak Charge Reduction applications. Its serviceable top-cover access ensures straightforward installation and long-term maintenance, while robust protection features safeguard your investment.
Key Features
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18.5 kWh Lithium Iron Phosphate Battery – Long-lasting, efficient, and safe energy storage
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Scalable Design – Expandable up to 370 kWh for larger systems
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Advanced Protection Systems – Safeguards against overcharge, deep discharge, overheating, and over-current
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Smart Battery Management System (BMS) – Provides cell monitoring, balancing, and closed-loop inverter communication
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Reliable Performance – Enhanced surge capacity to handle high inverter loads
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Easy Servicing – Optimized internal structure with top-cover access
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Flexible Integration – AC/DC coupling for versatile solar and energy storage setups
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Multiple Applications – Perfect for Off-Grid living, Backup Power, Self-Supply, and Peak Load Shaving
Why Choose the eVault Max 18.5kWh LFP Battery?
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Built with Fortress Power’s proven reliability
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Safe and stable chemistry with lithium iron phosphate technology
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Designed for long service life and efficient energy cycling
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Compatible with leading inverter brands for plug-and-play integration
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Supports sustainable energy independence for homes and businesses
Applications
The eVault Max 18.5kWh LFP Battery is ideal for:
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Off-grid solar systems
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Whole-home backup power
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Peak charge reduction and demand management
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Residential and commercial energy storage projects
Order the eVault Max 18.5kWh LFP Battery Today
Empower your energy independence with the Fortress Power eVault Max 18.5kWh LFP Battery—a scalable, intelligent, and safe energy storage system designed for modern solar and backup power applications.
Shop now and upgrade your energy storage to Fortress Power’s most advanced solution.
Specifications
| al Energy (kWh) | 18.5 |
| Capacity[Ah] | 360 |
| Nominal Voltage [V] | 51.2 (48) |
| Voltage Range[V] | 48-55 |
| Recommended Charge Current [A] | 150 |
| Max. Charge Current (Continuous)[A] | 180 |
| Max. Discharge Current (Continuous)[A] | 180 |
| Max. Pulse Current (for 10 sec) [A] | 200 |
| Charging Temperature[F] | 32 to 120 |
| Discharging Temperature[F] | 14 to 77 |
| Dimension [H xW x D, inch] | 20.3 x 20.3 x 42.2 |
| Weight[lbs] | 520 |
| Enclosure Protection Rating | IP55 |
| Mounting options | Floor standing |
| Certificates | UL 1642, UL1973, UL9540 |
| Warranty | 10 Years |
| Scalability | Maximum 20 in Parallel (370 kWh) |
| Communication | CAN/RS485 |
| High Current Circuit Breaker | 250A |
| Efficiency | >98% |
Manuals and Downloads
Datasheets
eVault MAX Data Sheet
SPANISH eVault Max Data Sheet
SPANISH eVault Max Brochure
Warranty Letter
Installation Guides / Warranty
Quickstart Guide
Installation Manual
Inverter Guides (how to configure your inverter/charger)
Battery Firmware Download
Certifications
UL9540 Test Certificate
UL9540a Large Scale Fire Test Report
Application Note on Wall Spacing + Drywall Type
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We do not sell any used or refurbished items.
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Frequently Asked Questions
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