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Fortress Power eVault Max 18.5kWh LFP Battery

1 – 9 $11,465.00 $0.62
10 – 24 $11,189.00 $0.60
25 + $10,980.98 $0.59

Note: The price in the table above indicates $/Wh

Ships From Manufacturer. Lead times may vary. Please email info@renvu.com for an accurate lead time.


Fortress Power eVault Max 18.5 kWh Lithium Battery The newest innovative Lithium Iron Phosphate battery from Fortress Power is the eVault Max 18.5 kWh. 

An all-in-one solution for your residential and commercial needs. Scalable up to 370kWh with a serviceable top cover access to make installation of this battery simple and worry free. 

The eVault Max is AC/DC coupled to solar arrays and works for many applications that require solar storage, including Off-Grid, Back Up power, self-supply and Peak Charge Reduction just to name a few.

What's included:
• Large LED Display screen
• Sleek Industrial-Grade Aluminum
• Front-Serviceable Cover
• Transportable on wheels

The eVault Max 18.5 is The Largest Single Residential Battery On The Market!
• Safe Lithium Iron Phosphate Technology (LiFeP04)
• High Durability and Long-Lasting
• Closed Loop Communication with Inverters
• Scalable from 18.5 kWh - 370 kWh
• Intelligent Digital Processor Based BMS
• Advanced cell level monitoring and balancing
• IP55 Aluminum Industrial Grade Enclosure
• Touch screen LCD performance display

The Built-In Smart and Reliable Relay-Based Battery Management System integrates multilevel safety concepts for excellent performance:
• Overcharge and Deep Discharge Protection
• Over-heat protection
• Over Current Protection
• Cell Monitoring and Balancing
• Voltage and Temperature Monitoring
• Optimized Internal Structure – Easily Serviceable
• Handles More Surge Capacity from Inverters

Use solar power all day and night – even during grid outages!
• Provide power during grid outages
• Lower your electrical bill by avoiding having to buy electricity at peak times
• Enjoy a generous tax credit when incorporating with solar (US Only)
• Increase your independence from the utility grid


  • Manufacturer: Fortress Power
  • Model: eVault Max 18.5
  • Rated Power Output [W]: 18500
  • Length [mm (in)]: 515 mm (20.3 in)
  • Width [mm (in)]: 515 mm (20.3 in)
  • Depth [mm (in)]: 1073 mm (42.2 in)
  • Weight [kg (lb)]: 235.87 kg (520 lbs)
  • Warranty [Years]: 10