Manufacturer research Specifications checked 2026-10-04 US model
EcoFlow DELTA 3
The base DELTA 3 is a 1,024 Wh, 1,800 W portable station for selected 120 V essentials. Start with the exact model: DELTA 3, DELTA 3 Plus, and other variants do not share every charging specification.
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Check price at Amazon - Nominal capacity
- 1,024 Wh Manufacturer source for Nominal capacity (checked 2026-10-04; opens in a new tab)
Is it right for your household?
Selected 120 V essentials after checking running watts, startup demand, and daily energy.
Loads requiring 240 V or more than the continuous output rating.
More fit considerations
Other situations to consider
- Households that need a portable unit and can recharge between interruptions.
- Readers comparing documented transfer behavior with their actual equipment requirements.
Other reasons to choose a different setup
- Long outages without sufficient battery capacity or a dependable recharge plan.
- A different variant if your charging requirement exceeds the base model’s documented solar input.
Manufacturer specification record · No hands-on testing · Source records checked on 2026-10-04
Buy the model, not just the family name
This guide covers the base DELTA 3 US model EF-DL-H10-3. EcoFlow also sells DELTA 3 Plus and other DELTA 3 variants. The exact-model manual documents a 500 W solar input limit for this unit. Do not carry a faster charging specification from another family member into your purchase decision. Check the listing, label, and included cables together.
Size the battery around a day of real use
Its nominal capacity is stored battery energy, not all the AC energy your appliances will receive. Measure or estimate daily watt-hours, set a reserve, and account for conversion loss. A refrigerator cycles, while a heater can draw heavily for long periods; a single appliance wattage does not capture both patterns. The linked battery-runtime calculator lets you make those assumptions explicit.
Check startup and transfer separately
The manufacturer lists 1,800 W continuous output and 3,600 W surge. A surge figure alone does not establish the duration a motor needs to start. X-Boost is a separate feature, not permission to treat its advertised wattage as ordinary output. The documented 10 ms standby UPS transfer also needs an equipment-specific check; it is not zero-interruption backup.
An existing DELTA 2 may still do the job
A newer generation does not automatically justify replacing a working station. DELTA 2 has the same nominal base capacity and continuous output in our catalog. DELTA 3 changes other details, including the documented transfer time. Compare the particular gap in your plan before upgrading. We do not link the old DELTA 2 Amazon listing because it redirected to a different model during our link check.
Confirm expansion before budgeting for it
EcoFlow advertises compatible extra-battery options for the DELTA 3 family. Our record does not establish a single exact maximum configuration for this base-model purchase, so expanded capacity is left undocumented rather than used to satisfy a calculator requirement. Confirm the station, extra-battery model, cable, and supported combination directly with EcoFlow.
Specifications & sources
These are manufacturer specifications, not independent performance measurements. Source records checked on 2026-10-04. We have not tested this model hands-on.
- Nominal capacity
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1,024 Wh
Checked 2026-10-04. Source for Nominal capacity (opens in a new tab)
- Battery chemistry
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LFP (LiFePO4)
Checked 2026-10-04. Source for Battery chemistry (opens in a new tab)
- Continuous AC output
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1,800 W
Checked 2026-10-04. Source for Continuous AC output (opens in a new tab)
- Surge output
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3,600 W
Manufacturer's exact-model manual documents 3,600 W surge. This does not establish startup compatibility for a specific load.
Checked 2026-10-04. Source for Surge output (opens in a new tab)
- US AC outlet count
-
6 outlets
US product configuration.
Checked 2026-10-04. Source for US AC outlet count (opens in a new tab)
- 240 V AC output
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No
US/CA model AC output is 120 V.
Checked 2026-10-04. Source for 240 V AC output (opens in a new tab)
- Maximum solar input
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500 W
Exact-model manual (EF-DL-H10-3) specifies 500 W maximum; EcoFlow's product page mixes series-level DELTA 3 Plus details, so confirm the model label before applying this value.
Checked 2026-10-04. Source for Maximum solar input (opens in a new tab)
- Maximum documented expanded capacity
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Not verified in this source record
Manufacturer lists compatible extra batteries and markets expansion up to 5 kWh, but this record does not establish an exact Wh ceiling for the standalone DELTA 3 configuration.
Checked 2026-10-04. Source for Maximum documented expanded capacity (opens in a new tab)
- Transfer / switching time
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10 ms
Manual specifies standby UPS transfer time of 10 ms; this is not zero-transfer switching.
Checked 2026-10-04. Source for Transfer / switching time (opens in a new tab)
- Base-unit weight
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27.6 lb
Approximate net weight.
Checked 2026-10-04. Source for Base-unit weight (opens in a new tab)
- Listed warranty term
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5 years
Manufacturer lists a five-year warranty.
Checked 2026-10-04. Source for Listed warranty term (opens in a new tab)