EcoFlowExpansion batteryLiFePO4
DELTA Pro Smart Extra Battery
Expandable 3600Wh LFP battery to triple DELTA Pro capacity up to 10.8kWh with 10-year lifespan.
Capacity
3,600 Wh
Cycle life
3,000
Warranty
5 yr
Best price
Updated 6d ago
$1,299$2,799
−$1,500 (54%)
via EcoFlow Direct · ships free
Buy on EcoFlow Direct →Tracked redirect · we earn ~5% commission · doesn't affect your price
Price history · 90 days
EcoFlow Direct
EcoFlow Direct
$1,299
90-day low
$1,299 (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 3,600 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 | 2.1 days |
| Fridge only (cycle-averaged) | 70W | 1.8 days |
| Wifi router + LED lights | 55W | 2.3 days |
| Your full continuous load (215W) | 215W | 14.3 hr |
| Microwave + base load (peak) | 1300W | 2.4 hr |
| Window AC 8,000 BTU (avg) | 700W | 4.4 hr |
How DELTA Pro Smart Extra Battery compares to alternatives
DELTA Pro 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 Pro Smart Extra Battery3,600 Wh
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
AC continuous
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Surge
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Cycle life
DELTA Pro Smart Extra Battery3,000
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Solar input
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Native 240V
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Max system
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Weight
DELTA Pro Smart Extra Battery—
EcoFlow DELTA 2 Max Smart Extra Batterypending verify
EcoFlow DELTA 2 Smart Extra Batterypending verify
Best price now
DELTA Pro Smart Extra Battery$1,299
EcoFlow DELTA 2 Max Smart Extra Battery$699
EcoFlow DELTA 2 Smart Extra Battery$349
Wh per dollar
DELTA Pro Smart Extra Battery2.77
EcoFlow DELTA 2 Max Smart Extra Battery2.93
EcoFlow DELTA 2 Smart Extra Battery2.93
| Metric | DELTA Pro Smart Extra Battery | EcoFlow DELTA 2 Max Smart Extra Battery | EcoFlow DELTA 2 Smart Extra Battery |
|---|---|---|---|
| Capacity | 3,600 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 | $1,299 | $699 | $349 |
| Wh per dollar | 2.77 | 2.93 | 2.93 |