Fraud Blocker
Skip to content
An Unbound Renewable Energy Company
Open Mon-Fri: 6am to 5pm PST
  • About Us
  • Support
  • Blog
Unbound Solar Logo
  • Solar Products
  • Learn
CALL
1-800-472-1142
OR
Get Quote
  • Solar Products
    • All Solar System Kits
    • Grid-Tie
      • Grid-Tie system Kits
      • Grid-Tie w/ Battery Storage
      • Solar Panels
      • Inverters
      • Hybrid Inverters
      • Sol-Ark Inverter
      • Battery Backup Inverters
      • Mounting Hardware
      • Wiring
      • Breaker Panels
      • Combiner Boxes
      • Enphase Microinverters
      • SolarEdge String Inverters & Optimizers
      • SMA String Inverters
      • Sol-Ark Hybrid Inverters
      • Solar Permit Plan Set
    • Off-Grid
      • Off-Grid System Kits
      • Solar Panels
      • Inverters
      • Sol-Ark Inverter
      • Sol-Ark Hybrid Inverters
      • Pre-Wired Power Centers
      • Midnite Pre-wired Samlex Power Centers
      • Mounting Hardware
      • Generators
      • Charge Controllers
      • Wind Turbines
      • Wiring
      • Breaker Panels
    • Solar Panels
      • Tech Type – Mono PERC | Most Popular
      • Tech Type – Poly | RV, Boat, Remote
      • JA Solar
      • Q cells
    • Energy Storage
      • Generators
      • Batteries
      • Battery Banks
      • Backup Systems
      • Battery Chargers
      • Battery Enclosures
      • Battery Monitors
      • Battery Cable
      • Sol-Ark Inverter
      • EndurEnergy
      • Crown Flooded Batteries
      • FullRiver AGM Batteries
      • Fortress LFP Batteries
    • Commercial
      • Commercial Systems
      • Builder Program
      • Installer Program
      • SolarEdge 3-Phase String Inverters & Optimizers
      • SMA 3-Phase String Inverters
  • Learn
    • Customer showcase
    • Pros & Cons
      • Pros & Cons of Solar
      • Are Solar Panels Worth It?
      • Solar Cost Calculator
      • Solar Panels ROI
      • Solar Tax Credit
      • State Solar Incentives
      • Solar Lease Guide
      • Should You Lease Solar?
      • Solar Financing
    • Planning
      • Solar & Home Value
      • Community Solar
      • Sun Hours Map
      • Electrical Requirements
      • Permitting
      • Net Metering
      • Installation Method
    • Designing
      • Grid-Tie vs. Off-Grid
      • Sizing Your System
      • Solar Panel Efficiency
      • 60 Cell vs. 72 Cell Solar Panels
      • Monocrystalline vs. Polycrystalline Solar Panels
      • Best Solar Panels
      • Inverter Types
      • Best Grid-Tied Inverters
      • Ground vs. Roof Mount
      • Best Solar Panel Mounts
      • Lead-Acid vs. Lithium Batteries
      • Best Solar Batteries
      • Adding Battery Backup
    • Installing
      • Step-by-Step Installation
      • Planning & Safety
      • Wiring & Electrical
      • Mounting Panels
      • Battery Installation
      • Off-Grid Commissioning
    • Monitoring & Maintenance
      • Best Monitoring Solutions
      • Panel Cleaning & Maintenance
    • Frequently Ask Questions
      • Grid-Tie Cost Calculator
      • Do I Need Battery Backup?
      • Grid-Tie vs. Off-Grid
      • Off-Grid Cost Calculator
      • Off-Grid System Sizing
      • Best Batteries for Solar
      • Solar Cost Calculator
      • Best Solar Panels of 2021
      • 8 Costly Solar Mistakes to Avoid 
      • AGM vs. Gel Batteries
      • How to Add Battery Backup
      • Best Batteries for Solar
      • Solar Panel Installation Guide
      • California’s Energy Compliance
  • Solar 101
  • Free Guides
  • Project Calculators
  • Videos
  • Commercial
  • Builders
  • Installers
AI Terms
    Categories
      Brands
        Articles
          See more
          Products
            See more
            1. Home›
            2. Shop Solar Batteries & Backup›
            3. Batteries›
            4. Lithium Ferro Phosphate›
            5. eVault Max 18.5kWh Lithium Ferro Phosphate (LFP)
            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) 1
            Fortress Power

            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP)

            Fortress Power eVault Max 18.5 kWh LFP Battery, 51.2V (48V), 360AH

            $11,297.00

            Contact Us
            SKU: 9989912 Batteries, Lithium Ferro Phosphate, Shop Solar Batteries & Backup Brand: Fortress Power
            • Description
            • Features & Attributes
            • Documents

            Description

            Fortress Powers engineers are on a mission to provide you with the most advanced Lithium Iron Phosphate Battery available. Not only is the new Fortress eVault Max 18.5 kWh battery safe, long-lasting and affordable, but it is also equipped with an LCD screen that displays voltage, current, state of charge, and power output.

            The built-in Battery Management System integrates multilevel safety concepts for excellent performance:

            • Overcharge and deep discharge protection
            • Voltage and temperature monitoring
            • Cell monitoring and balancing

            Fortress Power Evault technology is capable of connecting 20 units in parallel to achieve 370kWh! These batteries connected in parallel can communicate with each other for voltage monitoring and balancing.

            Additional Features

            • 98% Roundtrip efficiency
            • High durability & long lasting
            • Safe Lithium Iron Phosphate technology (LiFePO4)
            • Cell level monitoring & balancing
            • CAN/RS485 Communication

            Features & Attributes

            Weight520.0 lbs
            Dimensions20.3 × 20.3 × 42.2 in
            MPN

            EVAULT MAX 18.5

            Battery Warranty

            Not Specified

            Battery Voltage (DC)

            48

            Documents

            Relevant Product Documents.

            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Manual PDF
            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Specifications PDF
            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Warranty PDF
            eVault Max 18.5kWh Lithium Ferro Phosphate (LFP) Installation PDF
            solar battery guide
            Download Our Solar Battery Guide
            A poorly designed system can ruin your batteries. Our Solar Battery Guide will help you size your battery bank properly and keep things running smoothly.
            Get free guide »
            • Learn
              • Learn
              • Solar 101: Start Here
              • Solar Resource Center
              • Solar Blog
              • Guide to DIY Solar
              • Getting Started with Solar
            • Tools
              • Tools
              • Solar Cost Calculator
              • Off Grid Calculator
              • Battery Bank Calculator
              • California Solar Mandate Calculator
              • Solar Permitting
            • Company
              • Company
              • About Us
              • Contact Us
              • Careers
              • Newsroom
            • Shop
              • Shop
              • Grid-Tie Solar
              • Off Grid Solar
              • Complete Systems
              • Solar Panels
              • Electrical
              • Batteries & Backup
              • Hardware & Racking
              • Commercial
            • Community
              • Community
              • Blog
              • Customer Showcase
              • Customer Testimonials
              • Ratings & Reviews
              • Referral Program
            • Support
              • Support
              • Support Hub
              • Terms & Conditions
              • Shipping Policy
              • Returns
              • Freight Delivery Tips
            Contact Us:
            Phone: 1-800-472-1142
            Address: Fullerton, CA
            Social Media
            Unbound Solar Facebook Page
            Unbound Solar YouTube Channel
            Unbound Solar Linked In Page
            Unbound Solar Instagram Feed
            • Terms of Use
            • Privacy Policy
            © 2026 Unbound Solar. All Rights Reserved.