EcoFlowExpansion batteryLiFePO4
DELTA 2 Smart Extra Battery
Expandable 1024Wh LFP battery to increase DELTA 2 capacity with 10-year lifespan and 3000+ charging cycles.
Capacity
1,024 Wh
Cycle life
3,000
Warranty
5 yr
Best price
Updated 3h ago
$349$799
−$450 (56%)
via EcoFlow Direct · ships free
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Price history · 90 days
EcoFlow Direct
EcoFlow Direct
$349
90-day low
$349 (2026-05-02)
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What reviewers said about this exact unit
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No reviewer coverage tracked yet.
Runtime predictions for your loads
Based on 1,024 Wh capacity · 95% LiFePO4 DoD · 90% AC inverter efficiency. Phase-1 uses constant-load math; time-resolved multi-day SOC simulation is the Phase-2 north star.
| Load profile | Continuous draw | Runtime estimate |
|---|---|---|
| CPAP only (overnight) | 60W | 14.6 hr |
| Fridge only (cycle-averaged) | 70W | 12.5 hr |
| Wifi router + LED lights | 55W | 15.9 hr |
| Your full continuous load (215W) | 215W | 4.1 hr |
| Microwave + base load (peak) | 1300W | 40 min |
| Window AC 8,000 BTU (avg) | 700W | 1.3 hr |
How DELTA 2 Smart Extra Battery compares to alternatives
DELTA 2 Smart Extra Battery specs verified from automated extraction with cross-source verification. Alternatives marked “pending verify” haven't been through the verification pipeline yet.
Capacity
DELTA 2 Smart Extra Battery1,024 Wh
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
AC continuous
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Surge
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Cycle life
DELTA 2 Smart Extra Battery3,000
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Solar input
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Native 240V
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Max system
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Weight
DELTA 2 Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA Pro Smart Extra Batterypending verify
Best price now
DELTA 2 Smart Extra Battery$349
EcoFlow DELTA 2 Max Smart Extra Battery$699
EcoFlow DELTA Pro Smart Extra Battery$1,299
Wh per dollar
DELTA 2 Smart Extra Battery2.93
EcoFlow DELTA 2 Max Smart Extra Battery2.93
EcoFlow DELTA Pro Smart Extra Battery2.77
| Metric | DELTA 2 Smart Extra Battery | EcoFlow DELTA 2 Max Smart Extra Battery | EcoFlow DELTA Pro Smart Extra Battery |
|---|---|---|---|
| Capacity | 1,024 Wh | pending verify | pending verify |
| AC continuous | — | pending verify | pending verify |
| Surge | — | pending verify | pending verify |
| Cycle life | 3,000 | pending verify | pending verify |
| Solar input | — | pending verify | pending verify |
| Native 240V | — | pending verify | pending verify |
| Max system | — | pending verify | pending verify |
| Weight | — | pending verify | pending verify |
| Best price now | $349 | $699 | $1,299 |
| Wh per dollar | 2.93 | 2.93 | 2.77 |