Complete DIY Home Solar Kits — Battery + Inverter for Grid or Off-Grid

Featuring Fortress Power solutions

Energy Storage Batteries, Inverters & Spare Parts

A trusted source for energy storage equipment, replacement parts, and accessories for system owners and installers.

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New Product
New Installation!

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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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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Your First Off-Grid Setup for Tiny Homes & Cabins

Start your off-grid journey with our starter system

Fortress Power Solo 6.5kW Off-Grid Solar Bundle with 10.8kWh eFlex MAX Batteries ~~$5,561.00~~ $4,661.00

Fortress Power Solo 6.5K Off-Grid Inverter | All-in-One | 48V ~~$1,649.00~~ $1,549.00

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.

Fortress Power eBoost 16kWh Lithium Battery + Envy Duo 21 Hybrid Inverter 16kW Output | DIY Solar Systems Kits ~~$9,288.00~~ $8,955.00

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 From $3,445.00

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Full-Home Power, Built to Last

The premium solution for full-home power or serious backup — build it once and enjoy years of worry-free energy.

Fortress Power eForce 19.2kWh + Envy True 12kW Hybrid Inverter Bundle ~~$13,767.00~~ $12,937.00

Fortress Power eForce Stackable 9.6kWh-28.8kWh LFP Battery From $3,645.00

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Fortress Power Envy True 12kW Hybrid Solar Inverter ~~$5,199.00~~ $4,898.00

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

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Your First Off-Grid Setup for Tiny Homes & Cabins