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Our eBoost Battery &
Envy Duo 21 Hybrid Inverter
are now arriving at customer sites and
being successfully installed
—bringing reliable power to life.

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Best Time to Build Your Energy！



Free shipping on U.S. mainland orders
$4000+
(Excludes solar panel-only orders)



FREE Guardian
($529 Value)
with the Envy + eForce Bundle


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Limited Time Offer:
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On U.S. mainland orders $4,000+
— now through March 31, 2026.
(Excludes solar panel-only orders)

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BUNDLE & MAXIMIZE PERFORMANCE

Receive a Free Guardian Gateway when you purchase an eForce + Envy Inverter

Plus, 15-year battery warranty and VPP participation — now through March 31, 2026.

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SEAMLESS POWER FOR MODERN LIVING

Backed by 15 Years of Trusted Performance

Enjoy peace of mind with an industry-leading, 15-year warranty, ensuring your battery delivers reliable power for years to come.

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Complete Kits, Zero Guesswork

Shop pre-built solar and battery systems designed for fast, frustration-free installation.

Pro-Grade Gear You Can Trust

We only carry high-quality products used by installers and off-grid professionals nationwide.

Real Tech Support, Not Just a Store

Our U.S.-based team is here to answer your questions before, during, and after your purchase.

Meet EcoVault — Built for DIY Solar, Trusted by Homeowners

From solar bundles and complete kits to batteries and inverters, EcoVault helps DIYers and homeowners design and build dependable off-grid and hybrid power systems—on their own terms.

Your First Off-Grid Setup for Tiny Homes & Cabins

Start your off-grid journey with our starter system

Save $900.00 Fortress Power Solo 6.5kW Off-Grid Solar Bundle with 10.8kWh eFlex MAX Batteries
Fortress Power Solo 6.5kW Off-Grid Solar Bundle with 10.8kWh eFlex MAX Batteries $5,561.00 $4,661.00
Save $100.00 Fortress Power Solo 6.5K Off-Grid Inverter | All-in-One | 48V
Fortress Power Solo 6.5K Off-Grid Inverter | All-in-One | 48V $1,649.00 $1,549.00
Save $450.00 Fortress Power eFlex Max 5.4kWh Small Solar Battery
Fortress Power eFlex MAX 5.4kWh Lithium Solar Battery $1,899.00 From $1,449.00
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Need More Power for Larger Homes or Backup Needs?

High-capacity batteries and hybrid inverters designed to keep more appliances running with extended solar backup.

Save $333.00 Fortress Power eBoost 16kWh Lithium Battery + Envy Duo 21 Hybrid Inverter 16kW Output | DIY Solar Systems Kits
Fortress Power eBoost 16kWh Lithium Battery + Envy Duo 21 Hybrid Inverter 16kW Output | DIY Solar Systems Kits $9,288.00 $8,955.00
Save $333.00 Fortress Power Envy Duo 21 48V Hybrid Solar Inverter – 16kW High-Power Output for Home & Small Business
Fortress Power Envy Duo 21 48V Hybrid Solar Inverter – 16kW High-Power Output for Home & Small Business $5,398.00 $5,065.00
Fortress Power eBoost 16kWh Solar Battery + eWay Conduit Box with 750A Busbars for Paralleling | 48V 314Ah | DIY-Friendly Home Backup | UL9540A
Fortress Power eBoost 16kWh Solar Battery + eWay Conduit Box with 750A Busbars for Paralleling | 48V 314Ah | DIY-Friendly Home Backup | UL9540A From $3,445.00
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Fortress Power eBoost 32 kWh Parallel Battery Bundle (2×16 kWh) ｜ 1×eWay, 1×eWay Lite
Fortress Power eBoost 32 kWh Parallel Battery Bundle (2×16 kWh) ｜ 1×eWay, 1×eWay Lite $7,630.00

Why Shop with EcoVault

We’re not just another online store. Here’s what makes us different.

🧰 Built for DIY

Our kits are designed for homeowners and installers—no confusing part lists or mismatched components.

🎓 Expert Guidance

From system design to post-install support, we’re here with real answers every step of the way.

✅ Trusted Brands Only

We vet every product before it hits our shelves. No no-name imports. No cut corners.

📦 Reliable Shipping

Orders ship quickly from U.S. warehouses with careful packaging and tracking updates.

What Our Customers Are Saying

Real feedback from real people—see why DIYers and off-grid homeowners trust EcoVault for their energy projects.

“The kit came with everything I needed.”

Super easy to install, and the support team walked me through the wiring questions I had. I’ll definitely be ordering again.

Mike B., Arizona
“Best experience I’ve had buying solar gear online.”

Fast shipping, great packaging, and it actually worked out of the box. No surprises.

Danielle T., North Carolina
“Straightforward, no fluff.”

I used the design tool, ordered a kit, and had power in my off-grid cabin in under a week.

Ron K., Montana

Trusted Brands, Proven Performance

We only carry products from industry-leading manufacturers known for quality, reliability, and real-world results. No knockoffs. No shortcuts.

The EcoVault Blog

Your Source for Solar Tips, Product Guides, and Energy Insights

View all posts
EcoFlow DELTA Pro vs Fortress Power eFlex MAX 5.4 kWh — Which Energy Storage System Fits Your Needs?
EcoFlow DELTA Pro vs Fortress Power eFlex MAX 5.4 kWh — Which Energy Storage System Fits Your Needs?

Introduction Selecting the right energy storage system is essential for home backup, off-grid living, or solar integration. Two standout options...

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Home solar battery system comparison: Fortress eForce, eBoost
Fortress Power eForce vs eBoost: Best Home Solar Battery System for Your Needs

Choosing the right storage batteries for home solar power can be overwhelming. Between capacity, power output, installation, and warranty, options may...

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eBoost 16kWh solar battery & Solo 6.5kW inverter, powerful for 3 bedrooms house
What Size Solar Inverter and Battery Do You Need for a 3-Bedroom House?

Understanding the Question: “What unit can handle a 3-bedroom house?” When homeowners ask this, they usually mean: Inverter size (kW...

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