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Fortress Power Avalon 48V 4.9 kWh 50A Battery Module


Description

Manufacturer Part Name: Fortress Power Avalon HV Battery Module Version 1

Single battery module for adding additional capacity to your Fortress Power Avalon Smart Whole-Home Energy Storage.

Avalon BMS and Battery Pack
  • Ultra-thin space saving design
  • 14.7 - 29.4 kWh (scalable up to 176.4 kWh)
  • Sealed IP65 rated enclosure protects against dust, water, and humidity
  • Active heating & passive cooling temperature management for outdoor installs
  • 8,000+ cycle life with tier 1 automotive grade Lithium Iron Phosphate (LFP) battery
  • Modular design that is easily stackable and expandable
  • Easy installation & logistics

Product Specifications

Fortress Power Avalon 48V 4.9 kWh 50A Battery Module Product Specifications

battery modules 3
nominal voltage (V) 144
operation voltage range (V) 119.25 ~ 157.5
nominal capacity (Ah) 102
nominal energy (kWh) 14.7
nominal charge/discharge current (A) 50
maximum surge rate 80A, 15 sec
maximum units in parallel 4
limited warranty (years) 15
cycle life @ EOL 70% 8,000
communication protocol CAN
weight 302 lbs
(137 kg)
size (LxHxD) 43" x 28.15" x 10.96"
(1092 x 715 x 278.4 mm)
ingress protection IP65
operation temperature charge: -10°C to 50°C
discharge: -20°C to 55°C
certifications UL1973, UL9540, UL9540A, CEC, SGIP, AC156
transportation classification UN3480, Class 9

Product Manual

N/A

Product Warranty

Fortress Power Product Warranty

Limited Warranty

This Limited Warranty applies to Covered Products (as defined below), unless a newer limited warranty is posted that applies to your Covered Product’s activation date. Always check Avalon High Voltage Energy Storage System - Fortress Power for the correct limited warranty governing your Covered Product.

Subject to the terms of this Limited Warranty, Fortress Power warrants to the Covered Owner (as defined below) that the products listed in the table below and installed for use at the original end user location (the "Original Location")—each referred to as a "Covered Product"—will be free from defects in workmanship and materials ("Workmanship Warranty") for the applicable Limited Warranty Period, provided that the Original Location is located within the following territories (the "Territory"):

  • The United States and Puerto Rico (all other U.S. territories are excluded).

This Limited Warranty is valid only when:

(a) The Covered Products are sold by Fortress Power or a Fortress Power-authorized reseller. (b) The warranty is valid to the extent permitted by the applicable laws of the Territory mentioned above.

Covered Products Limited Warranty Period

Covered Product Limited Warranty Period
Avalon HV Battery (AVB-V1) 15 years from the Activation Date or 8,000 discharged cycles, whichever comes first.
Avalon HV Inverter (11.4 kW & 7.6 kW) 10 years from the Activation Date (excluding the System Shutdown Switch, which has a 5-year warranty).
Avalon Smart Energy Panel (AVSEP-V1) 5 years from the Activation Date.

Activation Date

The "Activation Date" refers to the following:

  1. For Avalon HV Battery:

    • The earlier of:
      • (i) The "Energize by" date indicated on the Avalon HV Battery packaging, or
      • (ii) The date the Avalon HV Battery is activated at the Original Location via the Fortress Power Installer Portal, or
      • (iii) The date the Covered Owner receives "permission to operate" from the authorities having jurisdiction.
  2. For all other Covered Products:

    • The earlier of:
      • (i) The date the Covered Product is activated at the Original Location via the Fortress Power Installer Portal, or
      • (ii) The date the Covered Owner receives "permission to operate" from the authorities having jurisdiction.

Product FAQs

Fortress Power Product FAQs

Does energy storage work well with my solar system?

Yes. On the grid? Absolutely! Energy storage adds a lot of value to your solar systems. It keeps your solar system operating when your utility service is interrupted. Without energy storage, your PV system will be forced to shutdown when the grid is off.

If you live off grid, energy storage enables you to use the clean solar energy to power your home day and night.

Fortress Power also knows you’re a fan of conservation—energy storage saves both your surplus solar energy and your cash since it reduces on grid energy dependence.

Can I use energy storage without solar panels?

Absolutely. For on grid clients, a home energy storage unit  stores energy from your electricity provider. If an outage occurs, home energy storage can provide up to 24 hours of potentially life-saving power. Need more reassurance? Fortress Power offers batteries with larger storage capabilities, completely customizable to your needs. And, like you, we appreciate saving money. When electricity is at its lowest daily rate, our smart energy storage units use that period to charge. When peak electric use occurs, our energy storage units can discharge power to suit your lifestyle.

What about power outage protection?

Power interruptions shouldn’t disrupt your schedule. An energy storage system will keep your solar system operating during grid outages. When paired with solar panels, an energy storage system supplies unlimited energy delivery. The solar panels power your home during the day and use any excess power to charge the battery. At night, the system keeps your space bright. When used without solar panels, power outage support is dependent on battery size and your energy use. Batteries providing at least 12 hours of backup power are safest.

Why Choose Green Vista Living


At Green Vista Living, we’re passionate about providing top-quality renewable energy and eco-friendly products that not only enhance your life but also help protect the planet. We’ve built our business with one mission in mind: to be the go-to destination for renewable energy solutions, outdoor gear, and off-grid supplies. When you shop with us, you’re not just getting innovative products—you’re joining a community that’s committed to sustainability.

We Put Our Customers First


As a small, dedicated team, we care deeply about your experience. Unlike large, faceless online companies, Green Vista Living offers a personal touch in everything we do. We're here for you from start to finish—whether you need product advice, support after a purchase, or just have questions. Our knowledgeable customer service team is always just a phone call or email away, ready to assist you in any way possible.

We Share Your Passion for the Planet


Our love for the outdoors and sustainable living runs deep. Most of our team hails from the mountains of Colorado, where renewable energy and the environment are part of daily life. So when you call Green Vista Living, you’ll speak directly with an expert who understands both the technical side of renewable products and the lifestyle they support. Whether you’re looking for solar generators, EV chargers, or any of our eco-friendly offerings, you can trust us to guide you with expertise and passion.

Trusted Industry Experts


Our close partnerships with the best brands in renewable energy and outdoor gear give us insider knowledge that you won’t find anywhere else. We’ve taken the time to carefully select products that stand out for their quality and reliability. At Green Vista Living, we believe in understanding our products inside and out so that we can help you make the right choice with confidence.

More Reasons to Love Green Vista Living


Price Match Guarantee: Thanks to our partnerships, we offer the best prices around. If you find a better deal, we’ll refund the difference.


Free Shipping: We offer free shipping on most orders to the lower 48 U.S. states, making your shopping experience even easier.


100% Secure Ordering: Our site uses SSL Encryption technology to keep your payment and personal information safe and secure.


Volume Discounts: For large orders, we’re happy to provide special pricing—just reach out for a custom quote.


Authorized Dealer: As an authorized dealer for all our brands, you’ll receive full manufacturer warranties with every order.


At Green Vista Living, we aim to make your renewable energy and outdoor experience as seamless and enjoyable as possible. With our unmatched customer service, expertise, and dedication to quality, you can shop with confidence, knowing you’re supporting a company that’s as committed to the planet as you are.

Frequently Asked Questions

Yes! We provide free and fast shipping on MOST orders within the continental United States. However, some specific brands and items will require a quote. You can live chat or call us for a quote
Most orders ship out within 1–2 business days and arrive within 3–5 business days depending on your location.
We offer easy returns as long as your item meets the conditions outlined in our Return Policy. Items must be unused, in original packaging, and returned within the specified return window.
Absolutely! Our in-house product experts are here to help. Live chat or call us 513-743-829 for personalized advice before or after your purchase.
Yes. All products include any applicable manufacturer warranties, and we’ll help you handle any warranty claims if needed.
Yes, we only sell 100% authentic, brand-new products, sourced directly from our manufacturers or authorized distributors.
REAL REVIEWS, REAL RESULTS

Feedback From Our Customers

At Green Vista Living, we pride ourselves on delivering top-quality products and exceptional service to solar professionals and homeowners alike. Here's what our customers have to say about their experiences with us.

Kevin Leary
May 18, 2025
★★★★★

Incredible Tech Support from Anees of Green Vista Living. Exceptional service and went above and beyond on every question.

Bryan Cunningham
Off grid Kit • Dec 21, 2025
★★★★★

Shipment was slow due to high demand, but the team kept me informed and ensured everything arrived properly.

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