Arkpax Ark PRO 2300Wh Expansion Battery Backup System

Availability:
Only 0 available in stock
In stock
Pre-Order
Out of stock
$1569.99 $2239.99
30% off
Tax Include

Quantity

Arkpax Ark PRO Expansion Battery Overview

The Arkpax Ark PRO Expansion Battery is a 2300Wh add-on designed to extend the runtime of the Arkpax Ark PRO 2400W power station. With IP67 weatherproof construction, LiFePO4 chemistry, and the ability to chain up to 10 batteries for a total of 25.3kWh, it is the modular backbone of true off-grid and whole-home backup setups.

Key Features and Benefits

  • 2300Wh Additional Capacity: Doubles the runtime of the Ark PRO 2400W for extended power needs.
  • Expandable to 25.3kWh: Connect up to 10 expansion batteries to scale capacity to whole-home levels.
  • IP67 Waterproof and Dustproof: Built for harsh environments, fully protected against dust and water ingress.
  • LiFePO4 Battery Chemistry: Long-life LFP cells for safer, longer-lasting performance.
  • 3,000+ Cycle Life: Holds 80 percent capacity after a decade of regular use.
  • Seamless Integration: Plug-and-play pairing with the Ark PRO 2400W with no complex setup.
  • Robust and Portable: Compact 16.5 x 10.8 x 9.1 in housing weighs about 47 lbs.
  • Built for Long Outages: Ideal for extended emergencies, construction sites, and off-grid living.

Who Is This For?

The Ark PRO Expansion Battery is for owners of the Arkpax Ark PRO 2400W who need longer runtime than a single unit can deliver. It is ideal for off-grid homeowners, RV and van life users, contractors on extended job sites, and preppers who want to scale their backup capacity for multi-day outages.

Full Technical Specifications

Capacity 2300Wh
Battery Type LFP / LiFePO4
Cycle Life 3,000+ cycles to 80% capacity
Compatibility Arkpax Ark PRO 2400W
Maximum Expansion Up to 10 batteries (25.3kWh total)
Ingress Protection IP67 (waterproof and dustproof)
Dimensions Approx. 16.5 x 10.8 x 9.1 in (W42 x D27.5 x H23.1 cm)
Weight Approx. 46.96 lbs (21.3 kg)

Frequently Asked Questions

What can the Arkpax Ark PRO Expansion Battery power?

This is an expansion battery, not a standalone power station. When paired with the Ark PRO 2400W, it adds 2300Wh of capacity to power refrigerators, AC units, power tools, and most household appliances for many additional hours.

How long will the Arkpax Ark PRO Expansion Battery run on a full charge?

The 2300Wh capacity can power a fridge for 18+ additional hours, a CPAP machine for several extra nights, or many other devices depending on draw. Connect multiple batteries for whole-home backup.

Can the Arkpax Ark PRO Expansion Battery be charged with solar panels?

The expansion battery charges through the connected Ark PRO 2400W power station, which supports up to 1200W of solar input.

Does the Arkpax Ark PRO Expansion Battery arrive ready to use?

Yes. It ships ready to use out of the box. Just connect it to your Ark PRO 2400W power station and your capacity is instantly expanded.

Does Generator Vault offer financing for the Arkpax Ark PRO Expansion Battery?

Yes. Generator Vault offers flexible financing options so you can get powered up today and pay over time. Visit our financing page for details.

Warranty Information

All products sold at Generator Vault come backed by the manufacturer warranty. We also stand behind every purchase with our customer-first support team. If you experience any issues, contact us at 1-904-206-8588 or visit our Warranty Policy page for full details.

Why Buy from Generator Vault?

At Generator Vault, we make it easy to get the right power solution at the best price. Every order ships free with no sales tax, and our Low Price Guarantee means you never overpay. Shop with confidence knowing our expert team is available Mon-Sat 9am-6pm PST to answer your questions. Ready to power up? Explore financing options or contact us today.

Many products sold through Generator Vault include manufacturer-backed warranty coverage. Warranty terms vary by manufacturer, product category, and model.

Customers experiencing warranty-related issues should contact our support team for assistance with the warranty claim process.

Generator Vault will help facilitate communication with manufacturers when applicable; however, warranty coverage and claim approval are determined by the manufacturer according to their published warranty policies.

For warranty assistance, please contact sales@generatorvault.com or call (904) 206-8588 during normal business hours.

Welcome to Generator Vault — where your satisfaction is our top priority.

We understand that sometimes a product may not meet your expectations. Our return policy is designed to be fair and transparent, ensuring a smooth experience while protecting both you and our team.

General Return Rules

  • Return Window: Returns must be requested within 30 days of delivery.
  • Restocking Fee: A minimum 30% restocking fee applies to most returns, including refused shipments and incorrect address returns.
  • Product Condition: Returns are only accepted for unused, uninstalled products in original packaging (box, pallet, accessories, documentation). 
  • Non-Returnable Items: We do not accept returns on:
    • Used or modified items
    • Items not in resalable condition
    • Items missing original packaging
    • Accessories such as filters, short kits, range hood extensions
    • Please note: Briggs & Stratton only accepts returns for defective or damaged products. 
  • Damaged Items: Must be reported within 24 hours of delivery. Include clear photos of any damage to expedite resolution.

Exchange Policy

  • Exchange Window: Requests must be made within 30 days of delivery.
  • Condition: Items must be unused and in original packaging.
  • Process:
    • Original item is returned and inspected
    • Refund is issued (less fees)
    • Customer places a new order for the replacement item
  • Fees: A 30% restocking fee still applies to exchanges.

Refund Processing

Refunds are processed after we:

  1. Receive the returned item(s)
  2. Inspect for condition and eligibility
  3. Approve the return

Refunds are issued to the original payment method and may take up to 10 business days to appear on your statement.

Starting a Return

To initiate a return, please:

  1. Contact us at sales@generatorvault.com or +1-904-206-8588 (Mon–Fri, 9AM–5PM EST)
  2. Provide your Order Number and reason for return
  3. Our team will review your request and, if eligible, issue a Return Authorization (RA) Number
  4. Carefully package the item with all original contents
  5. Clearly label the package with your RA number
  6. Ship to the return address provided by our team
  7. Send us the tracking number to monitor the return

Note: Return shipping costs are your responsibility unless the product is defective or damaged.

Changing Shipping Address

To change your order's shipping address:

  1. Contact us immediately at sales@generatorvault.com or +1-904-206-8588
  2. Provide your Order Number and new shipping details
  3. Our team will confirm if the update is possible
  4. A change fee may apply depending on carrier or order status
  5. We'll send a confirmation once the update is successful

Frequently Asked Questions (FAQ)

Can I cancel my order? Yes — if it hasn't shipped yet. Otherwise, our standard return policy applies.

Do I have to pay for return shipping? If the product is defective or damaged, we cover it. Otherwise, return shipping is your responsibility.

How do I get a return label? If your return is approved, we'll email you a return label to print and attach.

My refund hasn't shown up yet — what should I do? Check with your bank and credit card provider. If it still hasn't posted after 7 business days, email us at sales@generatorvault.com.

Need Help?

We're here for you!

Email: sales@generatorvault.com Phone: +1-904-206-8588 Live Chat: Mon–Fri, 9AM–5PM EST

Thank you for shopping at Generator Vault! Your trust means everything to us — and we're here to make your experience smooth and stress-free.

At Generator Vault, we're committed to delivering a seamless and secure shipping experience. Below is everything you need to know about how your order gets from our warehouse to your doorstep.

Free Shipping to the Lower 48 States

We offer FREE shipping on all orders to the contiguous United States (lower 48). Orders are delivered via FedEx Ground, FedEx Freight, or another reliable carrier, depending on size and weight.

Curbside Delivery Only: Carriers will not deliver into your home, garage, or interior rooms. Please arrange for assistance if needed.

Order Cut-Off Processing Time

  • Order Cut-Off: Orders placed before 12:00 PM ET are processed the same business day.
  • Processing Time: 1–3 business days Shipping Time: 2–7 business days after processing.
  • Total Delivery Time: 3–10 business days after placing your order

Tracking Your Order

You'll receive a tracking number via email within 2–4 business days of placing your order. Use this tracking number to monitor your shipment from warehouse to curbside.

LTL Freight Shipments

For oversized or heavy items such as large standby generators and industrial-grade portable generators, we ship via LTL Freight:

  • Carrier will call ahead to schedule delivery
  • Signature required at time of delivery
  • Someone must be present to inspect and sign for the shipment

📌 Instruction: Replace the product examples above with your most common oversized/heavy SKUs once inventory is finalized.

Damaged Packages – What to Do

Check your box at delivery. If the package is visibly damaged, take clear photos of the box immediately.

Refuse the shipment and note the damage on the Bill of Lading (BOL).

Email us at sales@generatorvault.com with photos and order details.

All damage claims must be reported within 24 hours of delivery to be eligible for a replacement or refund.

Return Policy Overview

Items must be unused, uninstalled, and in original packaging
All accessories, manuals, and documentation must be included
Return shipping costs are non-refundable
Full policy here: Return & Refund Policy

Shipping Zones Restrictions

We currently ship only within the contiguous U.S.
No shipping to Alaska, Hawaii, Puerto Rico, Guam, U.S. territories, or internationally
Orders placed from outside our shipping zones will not be fulfilled

Please email sales@generatorvault.com before placing an order if you are unsure about your shipping eligibility.

Frequently Asked Questions

Can I change my shipping address? Yes — please contact us within 24 hours of placing your order to request an address change. Email: sales@generatorvault.com

Can I cancel my order before it ships? Yes — orders may be canceled before they are dispatched. Once shipped, our Return Policy applies.

Need Help?

We're here to assist you every step of the way:

Email: sales@generatorvault.com Phone: 904-206-8588 Live Chat: Mon–Fri, 9AM–6PM ET

Thank you for choosing Generator Vault. We're honored to be part of your journey toward reliable power and peace of mind.