EcoFlow DELTA 3 Plus

EcoFlow DELTA 3 Plus

By EcoFlow · Portable Power Stations · Audio & Electronics

  • 1,024Wh capacity, expandable to 2/3/5kWh with add-on batteries
  • 1,800W continuous output (3,600W surge)
  • Dual 500W MPPT solar inputs
  • X-Stream fast-charging technology

Lowest price seen
$669.00
from $669.00 at EcoFlow (D2C) · Checked Sep 28, 2026

Prices are snapshots. Check the current price with the store.

Problems, parts and running costs

Summary

A 1,024 Wh LFP portable power station with 1,800 W continuous AC output, fast wall charging, dual 500 W solar inputs and a five-year warranty. Check the UPS behaviour before you buy: owners report the battery draining during pass-through operation and firmware updates that cut AC output.

Strengths

  • Charging is the clearest advantage: 1,500 W AC charging plus dual 500 W solar MPPT inputs.
  • The 1,000 W solar ceiling is high for a 1 kWh station, and the platform accepts a 1,024 Wh extra battery.
  • Two 140 W USB-C ports cover modern laptops, cameras and power banks without using the AC inverter.
  • The DIY Life ran two 3D printers through a grid loss without either stopping.
  • LFP chemistry with a 4,000-cycle rating backed by a five-year warranty.
  • The app exposes charge limits, schedules and grid-bypass behaviour.

Weaknesses

  • UPS and pass-through behaviour is inconsistent: owners report battery drift in bypass, unconditioned generator voltage and firmware updates that shut off AC output.
  • The sub-10 ms figure is a switchover rating; one owner oscilloscope test measured up to about 14 ms when the unit was fully charged in bypass.
  • At 27.6 lb it is portable but not light.
  • Full-load testing measured about 48 dB very close to the unit, and fast charging audibly raises fan activity.
  • Only 1,024 Wh is built in, so a fridge, heater or power tools drain it quickly.
  • X-Boost reduces voltage to run higher-rated resistive loads; it does not raise the inverter’s real output.

Verified specifications

Exact modelUS hardware model EF-DL-H10-4, retail model EFDELTA3P-US.
Battery1,024 Wh, 51.2 V 20 Ah LiFePO4/LFP, rated for 4,000 cycles to 80% capacity.
AC outputpure sine wave, 1,800 W continuous and 3,600 W surge, across six AC outlets.
X-Boostdevice support up to 2,200 W, separate from the 1,800 W continuous rating.
USB-Ctwo ports up to 140 W each, 280 W total.
USB-Atwo fast-charge ports, 36 W each, 72 W total.
12 V outputone car socket at 12.6 V/10 A and two DC5521 ports at 12.6 V/3 A, 126 W total.
Total output ports
AC charging inputup to 1,500 W; the manufacturer claims 0-100% in 56 minutes under its test conditions.
Solar inputtwo XT60 MPPT channels, each 11-60 V/15 A/500 W, 1,000 W total.
UPSadvertised transfer time under 10 ms.
ConnectivityWi-Fi and Bluetooth through the EcoFlow app.
Operating temperatureoptimal 68-86°F; charging 32-113°F; discharging 14-113°F.
Dimensionsabout 398 × 202 × 283.6 mm (15.7 × 8.0 × 11.2 in); about 12.5 kg (27.6 lb).
Warrantyfive years.
Full research notes and sources

Charging and solar

EcoFlow claims a 0-100% AC charge in 56 minutes under its test conditions, and The DIY Life finished a full charge in 68 minutes in a roughly 29°C / 84°F workshop. Two XT60 solar inputs each accept 11-60 V at up to 500 W for 1,000 W total, and EcoFlow claims a full solar charge in about 70 minutes at that input. The 12 V car socket accepts 8 A; higher-power vehicle charging needs the optional 800 W alternator charger.

UPS and pass-through backup

The station advertises a transfer time under 10 ms, and independent testing kept computers and 3D printers running through a normal grid loss. Owner experience is more mixed. A March 2025 owner reported that a generator’s voltage sag passed straight through to connected loads before the output shut off, and an April 2025 owner using the unit as refrigerator backup found the state of charge falling during AC pass-through. In February 2026 owners reported that a firmware update cuts AC output, and in August 2026 an owner with two units described AC input turning off and the batteries draining until a manual reset. If the station backs up sensitive gear, put a conventional line-interactive UPS between it and the load, and test the exact setup by pulling grid power before trusting it unattended.

Heat, noise and upkeep

The manual quotes below 30 dB under 600 W and below 40 dB under 1,200 W, without a measurement distance; The DIY Life measured about 48 dB within 10 cm at a full 1,800 W load. The Solar Lab recorded one sample reaching roughly 138°F internally during a sustained 1,573 W load, with about 82% efficiency at that load, and the same unit still reached about 126°F after cooling and retesting. That is one review sample, not a model-wide defect rate. Keep ventilation clearance, avoid sustained high-power use in hot enclosed spaces and clean the vents as the manual instructs. There are no scheduled consumables, and the internal battery, inverter, fans and MPPT controllers are not published as user-replaceable modules.

Running costs and parts

There are no filters, fuel or subscriptions. One nominal full charge a week stores about 53.25 kWh a year, about $9.75 at the July 2026 US residential average of 18.31 cents/kWh; a full charge every day stores about 373.8 kWh a year, about $68.44. Wall consumption is higher because charging and inversion are not lossless. Optional capacity is the main cost: the 1,024 Wh DELTA 3 Series Smart Extra Battery is $409 direct, and the 800 W Alternator Charger is $269 direct. The XT150 output cable for the alternator charger runs $89 for 1 m or $99 for 2 m.

Is it worth it?

At $450 or less it is an excellent buy. It stays a very good buy at $451-$500 and a good buy up to about $550. Above $650, skip it unless you specifically want EcoFlow’s dual-MPPT and extra-battery ecosystem. EcoFlow direct lists it at $719, down from $799, and Home Depot shows about $719; Costco has shown it around $549.99, with warehouse prices reported near $499.99. The 1,024 Wh Anker SOLIX C1000 Gen 2 is $529.99 direct and the BLUETTI Elite 100 V2 is about $489, so the EcoFlow makes sense when its solar input and expansion path matter more than price.

Which model this is

This page covers the DELTA 3 Plus, US hardware model EF-DL-H10-4 and retail model EFDELTA3P-US, in the DELTA 3 family. Do not confuse it with the DELTA 3 Classic, DELTA 3 Max or older DELTA 2 units, which are different stations with their own specifications. EcoFlow sells it directly in multiple bundles and changes promotional pricing, so check the configuration of a bundle rather than assuming which accessories are included.

Sources

Manufacturer:

Independent reviews:

Owner reports:

Parts and stores:

Buying guides for this category

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