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Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!
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Fortress Power E-Vault Max 48 Volt 360 Amp, 18.5kWh Lithium Battery-1

Fortress Power E-Vault Max 48 Volt 360 Amp, 18.5kWh Lithium Battery

SKU EVAULTMAX18.5
$7,693.07

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    Full manufacturer warranty included

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The Fortress Power EVault Max 18.5 kWh is a high-capacity, 48V lithium iron phosphate (LFP) battery designed for whole-home backup, off-grid living, and large residential or light commercial energy storage. It features a smart, digital Battery Management System (BMS) for safety and performance and is scalable for more extensive storage needs. 
Key specifications
  • Chemistry: Lithium Iron Phosphate (LiFePO₄ or LFP), known for its safety, durability, and long lifespan.
  • Total energy: 18.5 kWh.
  • Nominal voltage: 51.2 V (48V nominal).
  • Capacity: 360 Ah (Amp-hours).
  • Maximum charge current: 180 A (continuous).
  • Maximum discharge current: 180 A (continuous).
  • Scalability: The system can be expanded by connecting up to 20 units in parallel, for a total capacity of 370 kWh.
  • Efficiency: Over 98% round-trip efficiency.
  • Cycle life: 8,000+ cycles at 80% Depth of Discharge (DoD).
  • Dimensions: 20.3" x 20.3" x 42.2" (width x depth x height).
  • Weight: 520 lbs.
  • Certifications: UL 9540, UL 1973, and UL 1642 certified.
  • Warranty: 10 years. 

Features and applications
  • Whole-home and off-grid power: The high-capacity storage is designed to provide reliable backup power for an entire home or a complete energy solution for off-grid applications.
  • Solar integration: The EVault Max is compatible with both AC and DC-coupled solar arrays, allowing it to store excess energy generated during the day for use at night.
  • Smart BMS: An integrated battery management system monitors cell-level performance, manages voltage and temperature, and protects against overcharging and over-discharging.
  • Inverter compatibility: It supports closed-loop communication with many hybrid inverters to optimize performance.
  • Energy cost reduction: By using stored power during peak-rate hours, users can reduce their electricity costs. It can also help businesses reduce peak demand charges.
  • Easy installation and maintenance: The battery features a floor-standing, all-in-one design with serviceable top access and an LCD display for performance monitoring.
  • Durable enclosure: The unit has an IP55-rated industrial-grade aluminum enclosure, making it suitable for both indoor and outdoor installation. 

Important considerations
  • Shipping: Due to its size and weight, the battery requires freight shipping.
  • Installation: Installation must be performed by a qualified technician to ensure safety and adherence to electrical codes. The unit must not be connected in series, as this will damage the battery and void the warranty.
  • Inverter compatibility: While compatible with many inverters, it is recommended to confirm proper integration with your specific inverter model. 

Shipping is FREE on all orders to customers within the 48 Contiguous States and the District of Columbia. We do not ship to Alaska, Hawaii, or any outlying islands and territories.

Processing time for orders is 1 business day

Shipping time for orders is 4-5 business days


Want to know more about our Returns Policy? Read more here.

Want to know more about our Shipping Policy? Read more here.

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Krato Power.

  • Family Owned & Operated. Ask for Alex (Owner) at any time!
  • 4-5 Day Free Shipping with free liftgate service to the 48 Contiguous States and the District of Columbia. No extra charges. Ever
  • NO Sales Tax except for IN
  • Secured Purchase. All Customer data is secured with SSL Encryption
  • 30 Day Easy Returns. Not happy with your product, we'll take it back no questions asked.
  • Exceptional Customer Service. Check out our About Us page.
  • Call or Text Us - We are really here! (In the USA). 1-888-855-7286
In Stock and Ready To Ship

All of our items are in stock and ready to ship. All items ship within 1 business day.

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We have excellent customer service. Questions? Call us at 1-888-855-7286

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30 Day Easy Return Policy

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Description
The Fortress Power EVault Max 18.5 kWh is a high-capacity, 48V lithium iron phosphate (LFP) battery designed for whole-home backup, off-grid living, and large residential or light commercial energy storage. It features a smart, digital Battery Management System (BMS) for safety and performance and is scalable for more extensive storage needs. 
Key specifications
  • Chemistry: Lithium Iron Phosphate (LiFePO₄ or LFP), known for its safety, durability, and long lifespan.
  • Total energy: 18.5 kWh.
  • Nominal voltage: 51.2 V (48V nominal).
  • Capacity: 360 Ah (Amp-hours).
  • Maximum charge current: 180 A (continuous).
  • Maximum discharge current: 180 A (continuous).
  • Scalability: The system can be expanded by connecting up to 20 units in parallel, for a total capacity of 370 kWh.
  • Efficiency: Over 98% round-trip efficiency.
  • Cycle life: 8,000+ cycles at 80% Depth of Discharge (DoD).
  • Dimensions: 20.3" x 20.3" x 42.2" (width x depth x height).
  • Weight: 520 lbs.
  • Certifications: UL 9540, UL 1973, and UL 1642 certified.
  • Warranty: 10 years. 

Features and applications
  • Whole-home and off-grid power: The high-capacity storage is designed to provide reliable backup power for an entire home or a complete energy solution for off-grid applications.
  • Solar integration: The EVault Max is compatible with both AC and DC-coupled solar arrays, allowing it to store excess energy generated during the day for use at night.
  • Smart BMS: An integrated battery management system monitors cell-level performance, manages voltage and temperature, and protects against overcharging and over-discharging.
  • Inverter compatibility: It supports closed-loop communication with many hybrid inverters to optimize performance.
  • Energy cost reduction: By using stored power during peak-rate hours, users can reduce their electricity costs. It can also help businesses reduce peak demand charges.
  • Easy installation and maintenance: The battery features a floor-standing, all-in-one design with serviceable top access and an LCD display for performance monitoring.
  • Durable enclosure: The unit has an IP55-rated industrial-grade aluminum enclosure, making it suitable for both indoor and outdoor installation. 

Important considerations
  • Shipping: Due to its size and weight, the battery requires freight shipping.
  • Installation: Installation must be performed by a qualified technician to ensure safety and adherence to electrical codes. The unit must not be connected in series, as this will damage the battery and void the warranty.
  • Inverter compatibility: While compatible with many inverters, it is recommended to confirm proper integration with your specific inverter model. 
Shipping

Shipping is FREE on all orders to customers within the 48 Contiguous States and the District of Columbia. We do not ship to Alaska, Hawaii, or any outlying islands and territories.

Processing time for orders is 1 business day

Shipping time for orders is 4-5 business days


Want to know more about our Returns Policy? Read more here.

Want to know more about our Shipping Policy? Read more here.

Why Buy From Us

We get it. You've got a lot of choice when it comes to online retailers. Here's why we think you should shop with us at Krato Power.

  • Family Owned & Operated. Ask for Alex (Owner) at any time!
  • 4-5 Day Free Shipping with free liftgate service to the 48 Contiguous States and the District of Columbia. No extra charges. Ever
  • NO Sales Tax except for IN
  • Secured Purchase. All Customer data is secured with SSL Encryption
  • 30 Day Easy Returns. Not happy with your product, we'll take it back no questions asked.
  • Exceptional Customer Service. Check out our About Us page.
  • Call or Text Us - We are really here! (In the USA). 1-888-855-7286