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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!

Price Match Guarantee 💲 Fast & Free Shipping 📦 No Sales Tax 💵 Post Purchase Support 🤝 Free Replacement Parts 🛠️ Dealer Warranty 👷🏼 Extended Warranty!
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Full front view of the Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery-EVAULTMAX18.5 shows a large white rectangular cabinet with a digital screen near the top

Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery

SKU EVAULTMAX18.5
by Fortress Power
Sold out
$8,853.99
$7,698.97
Availability: Translation missing: en.general.icons.icon_check_circle icon Out of stock

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Call/Text Us: 1-888-855-7286
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  • US Based Authorized Fortress Power Dealer

    Full manufacturer warranty included

  • 4-5 Day Free Shipping + No Sales Tax

    More savings on every purchase and ships in 4-5 business day

  • Easy 30-Day Returns & Price Beat Guarantee

    Risk-free shopping + best price guaranteed

  • Post-Purchase Customer Support

    Dedicated help whenever you need it


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Order within to get it by the earliest date.


Fortress eVault Max Makes Indoor Life Interruption-Free

Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery delivers high capacity, long life, and stable performance for whole home backup and energy storage. It features a 250A safety breaker, a smart LCD that shows voltage, current, and state of charge, and full front service access for easy maintenance. With a scalable design up to 370 kWh, UL9540 and UL1973 certifications, and reliable lithium ferro phosphate chemistry, it offers safer and longer-lasting power compared to many standard home batteries. Bring dependable energy security to your home with the Fortress eVault Max Battery - EVAULTMAX18.5. Buy yours today and enjoy powerful backup ready whenever you need it.

Features

  • Whole home and off-grid-ready energy storage
  • Compatible with AC and DC-coupled solar systems
  • Smart BMS for advanced cell-level protection
  • Works seamlessly with top hybrid inverter brands
  • Reduces energy costs by shifting usage to stored power
  • Helps businesses cut peak demand charges
  • Floor-standing all-in-one design for easy installation
  • Top access and LCD screen for quick maintenance IP55 industrial aluminum enclosure for indoor or outdoor use Long-lasting and safe lithium ferro phosphate chemistry

An infographic layout highlights features of the Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery-EVAULTMAX18.5

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.

Product Documents

Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery-EVAULTMAX18.5 is shown with its front door open exposing the empty interior compartment and service space

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.

Top Customer Service

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

Hassle Free Returns

30 Day Easy Return Policy

Price BEAT Guarantee

Found a better price? We will BEAT it!

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Description

Fortress eVault Max Makes Indoor Life Interruption-Free

Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery delivers high capacity, long life, and stable performance for whole home backup and energy storage. It features a 250A safety breaker, a smart LCD that shows voltage, current, and state of charge, and full front service access for easy maintenance. With a scalable design up to 370 kWh, UL9540 and UL1973 certifications, and reliable lithium ferro phosphate chemistry, it offers safer and longer-lasting power compared to many standard home batteries. Bring dependable energy security to your home with the Fortress eVault Max Battery - EVAULTMAX18.5. Buy yours today and enjoy powerful backup ready whenever you need it.

Features

  • Whole home and off-grid-ready energy storage
  • Compatible with AC and DC-coupled solar systems
  • Smart BMS for advanced cell-level protection
  • Works seamlessly with top hybrid inverter brands
  • Reduces energy costs by shifting usage to stored power
  • Helps businesses cut peak demand charges
  • Floor-standing all-in-one design for easy installation
  • Top access and LCD screen for quick maintenance IP55 industrial aluminum enclosure for indoor or outdoor use Long-lasting and safe lithium ferro phosphate chemistry

An infographic layout highlights features of the Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery-EVAULTMAX18.5

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.

Product Documents

Fortress Power eVault Max 18.5 kWh Lithium Ferro Phosphate Battery-EVAULTMAX18.5 is shown with its front door open exposing the empty interior compartment and service space

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