EcoFlowDELTA Pro 3 Smart Extra Batteryexpansion batteryA matched product photo is not available for this variant.

EcoFlow · Expansion battery

EcoFlow DELTA Pro 3 Smart Extra Battery

Current model

EcoFlow DELTA Pro 3 Smart Extra Battery: 4,096 Wh expansion battery. Check the required station and connection cable.

Capacity: 4,096 Wh
Works with: DELTA Pro 3

1,899 USD

Selected configuration: DELTA Pro 3 Extra Battery

Exact model / SKU

EFDELTAPRO3EB · 41385808199753

Check current price ↗Fit My Needs Full Specs ↓

Check current USD price and availability at EcoFlow. Merchant checkout confirms the selected configuration.

Seller prices, financing, promotions, shipping and returns are set by the merchant. Manufacturer warranties follow the exact product and purchase terms.

Facts reviewed 2026-09-24

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Full Specs

Specifications apply to the stated market and configuration. Expanded-system figures require the named additional equipment.

Capacity: 4,096 Wh single batteryEcoFlow DELTA Pro 3 Smart Extra Battery US exact specification

Battery

Capacity: 4096WhEcoFlow source ↗ · reviewed 2026-09-24
Battery and cycle-life conditions: Model EFD521-EB: 4,096 Wh / 80 Ah at 51.2 V, LFP. EcoFlow specifies at least 80% state of health after 4,000 cycles at 0.5C charge / 0.5C discharge and 25°C.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24

Outputs

Output Port: 40V-58.4V=100A MaxEcoFlow source ↗ · reviewed 2026-09-24

Charging

Input Port: 40V-58.4V=80A MaxEcoFlow source ↗ · reviewed 2026-09-24
Proprietary battery-port limits: The manual lists a 40–58.4 V proprietary connection, up to 80 A input and 100 A continuous output. These are battery-port limits, not a general-purpose DC outlet or a claim of AC inverter power.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24

Configurations & compatibility

Compatible with: EcoFlow DELTA Pro 3EcoFlow source ↗ · reviewed 2026-09-24
Station and charging requirements: A DELTA Pro 3 supports two of these extra batteries. The battery extends runtime through the station and does not have its own AC outlets. Charging uses the supplied cable and DELTA Pro 3, or the documented Smart Generator connection with a separate DELTA Pro to Smart Generator Adapter.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24

Dimensions & operation

Charge Temperature: 32°F~113°FEcoFlow source ↗ · reviewed 2026-09-24
Dimension: 694mm*295mm*215mmEcoFlow source ↗ · reviewed 2026-09-24
Discharge Temperature: 14°F~113°FEcoFlow source ↗ · reviewed 2026-09-24
Display: LED ArrayEcoFlow source ↗ · reviewed 2026-09-24
Size and operating limits: 33 kg; 215.5 × 295 × 691.8 mm. Charge at 0–45°C; discharge/storage at −10–45°C. The complete product is IP20; IP65 applies only to the internal battery pack. Keep the unit dry.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24
Long-term storage: The manual advises cycling the battery every three months and storing it near 60% charge in a cool, dry, ventilated place. Check the current manufacturer instructions and warranty conditions for prolonged storage.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24
Storage Temperature: 14°F~113°FEcoFlow source ↗ · reviewed 2026-09-24
Weight: 33kgEcoFlow source ↗ · reviewed 2026-09-24

Included equipment

Standard battery package: One DELTA Pro 3 Smart Extra Battery, one extra-battery cable and product documents. The DELTA Pro 3 station and Smart Generator adapter are separate unless included in the chosen bundle.Reviewed manual scope: Complete English online manual; exact model specification and included-equipment sectionsEcoFlow source ↗ · reviewed 2026-09-24
What’s in the box: 1. EcoFlow Delta Pro 3 Smart Extra Battery 2. Quick Start Guide 3. Safety Guide 4. Warranty Card 5. EcoFlow Extra Battery CableEcoFlow source ↗ · reviewed 2026-09-24

Warranty & documentation

Regional manufacturer warranty policy: 5 years. Original-purchaser coverage starts at delivery, requires proof of purchase from EcoFlow or an authorized seller, and applies to purchase and use in the United States. Buyers outside the contiguous U.S. bear transport costs to and from the contiguous U.S. Normal wear is excluded. Check the linked policy for eligibility and exclusions.Exact regional policy match; Full official HTML; original-purchaser terms, regional service, registration and exact period row reviewed; preserve purchase-date eligibility and exclusions.EcoFlow source ↗ · reviewed 2026-09-24

Verified compatible accessories

Manuals & downloads

Reviewed manufacturer user manual ↗