Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living

BigBattery Ethos 3x Expansion Kit

Authorized BigBattery Dealer | Full Vendor Warranty Included

Customers rate us 4.6/5 based on 417 reviews.
$3,467.50
$6,340.00
$3,467.50
Save $2,872.50
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Big Battery Ethos 3x Expansion Kit - Green Vista Living

BigBattery

BigBattery Ethos 3x Expansion Kit

$6,340.00 $3,467.50
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living
Big Battery Ethos 3x Expansion Kit - Green Vista Living

BigBattery

BigBattery Ethos 3x Expansion Kit

$6,340.00 $3,467.50
  • Description

Big Battery Ethos 3x Expansion Kit

Supercharge your BigBattery Ethos system with the 3x Expansion Kit! Easily triple your stored energy capacity for extended backup power, deeper self-sufficiency, and increased solar energy utilization. This kit seamlessly integrates with your existing Ethos setup, delivering reliable, safe, and scalable home energy storage.

Features:

  • 3x 5.12kWh Stackable Battery Modules: Adds 15.36kWh to your existing Ethos system, reaching a total capacity of 25.6kWh.
  • Modular & Scalable Design: Expand your energy storage as your needs grow, up to 4 stacks (20.48kWh).
  • Intelligent Battery Management System (BMS): Ensures optimal performance, cell balancing, and safe operation.
  • Rugged IP65-Rated Casing: Weatherproof and dustproof for indoor or outdoor installation.
  • Interactive LED Display: Monitor key system stats like real-time power usage, battery health, and charging status.
  • CANBus/RS485 Communication: Enables advanced monitoring and integration with compatible inverters and systems.
  • 10-Year Warranty: Provides peace of mind and long-lasting investment value.

Benefits:

  • Extended Backup Power: Enjoy hours, even days, of reliable electricity during outages.
  • Deeper Self-Sufficiency: Increase reliance on solar energy and reduce dependence on the grid.
  • Enhanced Solar Energy Utilization: Store excess solar power for later use, maximizing your solar investment.
  • Peace of Mind & Security: Be prepared for unexpected power cuts and weather events.
  • Scalable Solution: Grow your energy storage capacity as your needs evolve.
  • Durable & Reliable: Built to last with high-quality materials and industry-leading warranty.

Specifications:

  • System Voltage: 48V
  • Nominal Voltage: 51.2V
  • Chemistry: LiFePO4
  • kWh Capacity: 15.36kWh (per kit)
  • Ah Capacity: 300Ah (per kit)
  • Dimensions: 22.6" x 16.5" x 12.6" (per module)
  • Weight: 387 lb (175.5 kg)

Upgrade your home energy resilience with the Big Battery Ethos 3x Expansion Kit! Order yours today and unlock the power of expanded battery storage.

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.

Over 2,000+ Online Orders

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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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