OUTPUT • STORAGE • EXPANSION
5 best whole-home solar generator systems
Five expandable battery systems compared by continuous output, storage capacity, solar input, transfer equipment and service.
Updated October 21, 2026 · Independent editorial comparison
TOP5Backup power
AVAILABLE SAVINGS
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Delivery offer
BLUETTI advertises free U.S. shipping, generally from a U.S. warehouse. Installed home systems can still require electrician, permitting and installation charges.
Discounts, coupons, shipping offers and sale prices can change and may not combine. “Free shipping” does not necessarily include unloading, room placement, assembly, installation, site work or return freight. Verify the final checkout total before purchasing.
#1BLUETTI EP900 System
Best overall home backup
Product overview
A modular high-voltage system designed for substantial household backup and solar integration.
Strength
Modular high-voltage home backup with solar-integration potential.
Weakness / tradeoff
Professional design/installation and compatibility review are essential; usable backup depends on load planning.
Before buying
Confirm the exact model or configuration, current price, included accessories, delivery method, installation requirements, warranty coverage, return costs and local service availability. Product names and packages can change.
View official seller#2BLUETTI EP800 System
Best off-grid configuration
Product overview
An expandable system aimed at home backup and off-grid energy use.
Strength
Expandable storage for backup or off-grid use.
Weakness / tradeoff
Regional availability, installation rules and cold-weather behavior must be confirmed.
Before buying
Confirm the exact model or configuration, current price, included accessories, delivery method, installation requirements, warranty coverage, return costs and local service availability. Product names and packages can change.
View official seller#3BLUETTI AC500 + B300S System
Best modular flexibility
Product overview
A stackable platform that lets buyers add batteries as storage needs grow.
Strength
Flexible modular batteries and portable-style components.
Weakness / tradeoff
Multiple modules occupy space; whole-home transfer equipment and electrician costs are separate.
Before buying
Confirm the exact model or configuration, current price, included accessories, delivery method, installation requirements, warranty coverage, return costs and local service availability. Product names and packages can change.
View official seller#4BLUETTI Apex 300 System
Best newer expandable platform
Product overview
A modular ecosystem designed to scale from portable use toward larger backup needs.
Strength
Newer expandable ecosystem spanning portable and backup use.
Weakness / tradeoff
New platform has a shorter ownership track record; bundle contents and compatibility can change.
Before buying
Confirm the exact model or configuration, current price, included accessories, delivery method, installation requirements, warranty coverage, return costs and local service availability. Product names and packages can change.
View official seller#5BLUETTI EnergyPro System
Best installed-home approach
Product overview
A home-energy configuration for buyers planning a more permanent power installation.
Strength
More permanent home-energy approach with substantial capacity potential.
Weakness / tradeoff
Quote, permits, electrical work and installer availability can dominate total project cost.
Before buying
Confirm the exact model or configuration, current price, included accessories, delivery method, installation requirements, warranty coverage, return costs and local service availability. Product names and packages can change.
View official seller