On the US store the Delta 3 lists at $699 and sells for $599 in the Prime Day Fall Sale. The Delta 3 Plus lists at $799 and sells for $669. The gap is $100 at list and $70 at sale prices. In Europe the gap is smaller but still there: EcoFlow's French store lists the Delta 3 at EUR 749 and the Plus at EUR 799, and its Dutch store at EUR 749 and EUR 769. Both are 1024Wh machines with the same output and the same cycle life, so the extra money buys ports and a solar input, not capacity or power.
EcoFlow Delta 3 Plus vs Delta 3 (2026)
The EcoFlow Delta 3 wins for most people. Delta 3 Plus vs Delta 3 compared on price, ports, solar inputs and stock, and who should pay $70 to $100 more.
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EcoFlow Delta 3
$599 sale
VS
EcoFlow Delta 3 Plus
$669 sale
Quick Answer
EcoFlow Delta 3 wins overall
Price
Winner: Price
EcoFlow Delta 3
Battery, Output and Warranty
Identical. Both have a 1024Wh LiFePO4 battery rated for 4000 cycles to 80% capacity, 1800W continuous AC output with a 2200W X-Boost mode and a 3600W surge, under 10 ms UPS switchover, an IP65-rated battery pack, 1500W AC charging and a 5-year warranty. Both accept the Delta 3, Delta 2, Delta 2 Max and Delta Pro 3 extra batteries for up to 5kWh in total, according to EcoFlow's pages. If a spec sheet decides your purchase, nothing here separates them.
USB Ports and Device Charging
This is the Plus's clearest advantage. Its two USB-C ports are rated up to 140W against 100W on the Delta 3, and its USB-A fast charge is 36W against 18W. A 140W USB-C port can charge a high-power laptop at full speed. At 100W many laptops still charge, but slower under load. If you run a small office or a studio from the unit and charge laptops from it every day, the faster ports are worth something. For phones, tablets and ordinary laptops the Delta 3 is fine.
Winner: USB Ports and Device Charging
EcoFlow Delta 3 Plus
Solar Input
The Delta 3 has one solar input rated 11 to 60V and 500W at most. The Delta 3 Plus has two such inputs, each 500W. For a single array they behave the same. The second input matters when you want to wire two separate strings, for example panels on two roof faces or one fixed array plus a portable panel. If you only ever plug in one panel, or none, it does not matter.
Winner: Solar Input
EcoFlow Delta 3 Plus
Availability
At the time of writing the US store showed the Delta 3 in stock and the Delta 3 Plus as a pre-order with shipping in November. Stock moves, so check the listing before you decide. In France and the Netherlands both were listed as available. If you need a unit this month, the Delta 3 is the safer bet.
Winner: Availability
EcoFlow Delta 3
Final Verdict
The Delta 3 for Most People, the Delta 3 Plus for Heavy USB-C Users
Buy the Delta 3. The battery, the 1800W output, the 4000-cycle rating, the under 10 ms UPS and the 5-year warranty are identical on both, and it costs $100 less at list ($699 against $799) and $70 less at today's sale prices ($599 against $669). Buy the Delta 3 Plus only if you charge a high-wattage laptop from the USB-C ports every day, or you want to wire two separate solar arrays. In those cases the faster ports and second solar input are real. Otherwise the difference is not worth the money.
Frequently Asked Questions
Faster ports and a second solar input. The battery (1024Wh LiFePO4, 4000 cycles), the 1800W output with 2200W X-Boost, the under 10 ms UPS switchover and the 5-year warranty are the same. The Plus has USB-C up to 140W and USB-A fast charge at 36W, against 100W and 18W, and two solar inputs of 500W each against one.
Only for specific uses. It costs $100 more at list ($799 against $699) and $70 more at today's sale prices. If you charge high-wattage laptops from the USB-C ports daily, or you want two separate solar strings, the Plus pays for itself. If you do not, buy the Delta 3.
Yes. EcoFlow's pages list support for the Delta 3, Delta 2, Delta 2 Max and Delta Pro 3 extra batteries, up to 5kWh in total. The Delta 3 Plus page notes the connection runs through an Alternator Charger XT150 output cable.
EcoFlow rates both at under 10 ms switchover, which suits most computers and networking equipment. Check the tolerance of your own equipment before relying on it for anything critical.
Yes. EcoFlow's French store lists the Delta 3 at EUR 749 and the Delta 3 Plus at EUR 799. The Dutch store lists them at EUR 749 and EUR 769. Both stores show them as available.