DELTA 3 Classic
- you’ll carry it: 26.6 lb
- 1kWh covers your evening
- you only use AC and USB
DELTA 3 Max Plus
- you run 3,000W: microwave plus coffee maker
- you’ll add extra batteries later
- you use 12V gear or 1,000W of solar
Prices and stock checked by our price engine on November 5, 2026 at 7:29 AM EST. Each product is rechecked several times a day; the time refreshes when you load the page.
The Classic is a finished product. The Max Plus is the start of a system.
The EcoFlow DELTA 3 Classic stores 1,024Wh and delivers 1,800W from three outlets at 26.6 lb, with a 10ms UPS and a one-hour wall refill, but no 12V socket and no way to add a battery. The EcoFlow DELTA 3 Max Plus stores 2,048Wh and delivers 3,000W from four 20A outlets, adds a 30A Anderson port, 1,000W of solar and 2,600W generator charging, and grows to about 10kWh, at 48.7 lb. Prices sit $670 apart today. If 1kWh covers your evening and you never run 12V gear, the Classic is all you need; for a kitchen, a camper or a battery you’ll grow, the Max Plus.
Below: the differences with numbers, a 20-second calculator for your own gear, eight modeled situations, the cost of growing the Max Plus, a middle option, and what published tests found on each.
The Max Plus stores twice the energy, delivers 1,200W more, adds an Anderson port and a car socket, doubles the solar input and takes extra batteries. The Classic weighs 22.1 lb less and refills from the wall in about an hour. Prices sit $670 apart today.
- you carry it: 26.6 lb
- 1kWh is enough
- your loads stay under 1,800W
- you run 3,000W
- you’ll grow to 10kWh
- you need 12V or an Anderson port
The five differences that decide it
Both use LFP cells, the EcoFlow app over Wi-Fi and Bluetooth, Storm Guard, X-Boost for heating loads, a 10ms UPS and 1,800W or less of wall charging on a standard outlet, and the same warranty. These five gaps decide it.
Will it run your setup? Check in 20 seconds
Estimates use 85% usable capacity and 70% of rated solar output. Real results vary with temperature, inverter load, shade and appliance cycling. Fridge and freezer watts are daily averages and do not include compressor startup surges.
Runtime by appliance, one at a time
Simple energy estimates, not measured runtimes. About 870Wh usable on the Classic and 1,741Wh on the Max Plus; StorageReview measured 1.64kWh out of a Max Plus.
Appliance for appliance, the Max Plus lasts twice as long as the Classic.
Same appliance, same watts: the gap is always the size of the battery.Get our Black Friday alerts for EcoFlow
We track live prices on 40+ models from Jackery, EcoFlow, BLUETTI and Anker SOLIX. When a deal beats the lowest price we've recorded, you'll hear from us. During Black Friday week, one short recap a day at most.
Unsubscribe in one click. We may earn a commission when you buy through our links, at no extra cost to you. Privacy Policy
The price gap, in numbers
The EcoFlow DELTA 3 Max Plus costs $670 more than the EcoFlow DELTA 3 Classic and adds 1,024Wh: that is $0.65 per extra Wh, against $0.47 per Wh for the Classic.
Prices refresh daily from EcoFlow US.What the $670 buys: twice the battery (2,048Wh vs 1,024Wh), 3,000W instead of 1,800W, 12V outputs and room for extra batteries.
Two DELTA 3 Classics (2 × 1,024Wh) costs $191 less today.
Two Classics give you 2kWh in two 26.6 lb boxes, but each stays at 1,800W and neither can grow. The Max Plus takes up to two Max Plus extra batteries, the second through EcoFlow’s Expansion Adapter. EcoFlow US prices move often; the figures here are refreshed daily by our price engine.
The third option: the DELTA 3 Plus at $719
EcoFlow DELTA 3 Plus: $719 today
1kWh that can grow: 1,024Wh and 1,800W from six outlets, a 12V car socket and two DC5521 barrels, 1,000W of solar, a 56-minute wall refill, an IP65 battery pack and extra batteries up to about 5kWh, at 27.6 lb, with a 5-year warranty and no registration condition. It weighs a pound more than the Classic and keeps the Max Plus’s solar input. Our DELTA 3 Plus review goes deeper. See the DELTA 3 Plus at EcoFlow.
Eight modeled situations, worked out
Same formula as the calculator above: 85% of the rated capacity, no extra battery. The fridge averages 60W, about 525kWh a year.
24-hour outage, essentials only
The Classic gets you through the evening and the night; the Max Plus most of a day, or about 38 hours with one extra battery.
A full-size fridge, nothing else
About 14 hours on the Classic and 29 on the Max Plus.
Microwave and coffee maker at once
Only the Max Plus runs both. On the Classic, one at a time: X-Boost helps heating loads, not a microwave’s electronics.
CPAP, every night
Two to three nights on the Classic, five on the Max Plus.
A 12V compressor fridge in a camper
The Max Plus feeds a 12V fridge straight from its car socket or Anderson port. The Classic has no 12V output, so the fridge runs from an AC outlet through its own adapter, with the inverter on all day.
Refill from solar, each at its maximum
The same time, because the Max Plus takes twice the panels for twice the battery. EcoFlow says the Classic fills in about 2.5 hours at 500W.
Refill from the wall before a storm
Both reach 80% in about an hour; the Classic is full in about 60 minutes.
Moving it
The Classic is a one-hand carry. The Max Plus is a two-handed lift for one person.
Nine more differences, the spec sheet and the box
Smaller gaps that rarely decide the purchase, then the full specifications and what ships in the box.
DELTA 3 Classic and DELTA 3 Max Plus weight, dimensions and full specifications
Weight: 26.6 lb for the DELTA 3 Classic and 48.7 lb for the DELTA 3 Max Plus. Dimensions: 15.7 × 7.9 × 11.1 in and 19.4 × 9.5 × 12.0 in. Everything else is in the sheet below.
EcoFlow DELTA 3 Classic and EcoFlow DELTA 3 Max Plus full specifications
Every published figure for both units, grouped. Green marks the better value.
What’s in the box
DELTA 3 Classic
- DELTA 3 Classic power station1,024Wh, 26.6 lb
- AC charging cable
- Manuals and warranty card
- Solar cable sold separatelyEcoFlow Solar to XT60i cable
- No car charging cablesold separately, per the manual
DELTA 3 Max Plus
- DELTA 3 Max Plus power station2,048Wh, 48.7 lb
- AC charging cable
- Manuals and warranty card
- No solar cable, no car cablebundles include the matching cables
- No extra battery, no Alternator Chargerboth sold separately
From the EcoFlow US product pages and manuals; bundles add the matching cables.
07 · ChargingHow fast each one refills
Shorter bar, faster refill. Each row is scaled to its slower unit.
Classic: Basic Tutorials needed just under 55 minutes for a full charge on a 230V EU unitMax Plus: StorageReview measured 2.33kWh drawn from the wall for a full refill
Our solar times assume panels deliver 70% of their rating; the brands’ figures assume ideal sun.
Every port, side by side
DELTA 3 Classic
DELTA 3 Max Plus
Practical consequence: the Max Plus adds a fourth outlet, a 12V car socket, a 30A Anderson port, a 140W USB-C, a second solar port and an XT150 port for extra batteries, the Alternator Charger and the Smart Generator. The Classic has AC and USB only.
09 · NoiseNoise and heat: Classic vs Max Plus
Both are rated quiet: EcoFlow gives 30dB or less at 600W for the EcoFlow DELTA 3 Classic and 25dB or less for the EcoFlow DELTA 3 Max Plus. The Technology Man found the Max Plus barely above room noise while charging at full power.
EcoFlow’s figures. Reviewers gave no dB values.Every figure we found, with its source
What reviewers heard: During a high-load grill test, battery temperature in the app climbed from 35 to 53°C, with audible fans (Basic Tutorials, EU unit).
What reviewers heard: Barely registered above room noise at 1 m while charging at full power, with exhaust just over 40°C (The Technology Man, UK unit); fans almost never came on with a home office load (T3).
Measured by a tester Brand figure
- The fans run hardest while fast charging, so lower the charging speed in the app at night.
Cold and heat: Classic vs Max Plus
The EcoFlow DELTA 3 Classic and the EcoFlow DELTA 3 Max Plus share the same limits: charging from 32°F to 113°F, running from 14°F to 113°F. Neither carries a water rating.
Figures from the EcoFlow US product pages for both models.- Charge either one indoors in winter: neither charges below 32°F.
- Run it between 68°F and 86°F when you can: EcoFlow’s optimal operating range.
App, UPS and smart features
The EcoFlow DELTA 3 Max Plus does more: extra batteries, Smart Output Priority and a 2,600W Smart Generator link. The EcoFlow DELTA 3 Classic matches it on the app, Storm Guard and the 10ms UPS.
Same app and UPS. The gap is expansion and generator features.Green zone: a switch under about 16ms, which most desktop PCs ride through without restarting.
Can you add a battery later? The EcoFlow DELTA 3 Max Plus takes up to two Max Plus extra batteries, toward about 10kWh; the EcoFlow DELTA 3 Classic has no extra battery port.
Can it work with a Smart Generator? The EcoFlow DELTA 3 Max Plus charges from an EcoFlow Smart Generator at up to 2,600W. EcoFlow says the Smart Generator 3000’s automatic start-stop doesn’t work with the EcoFlow DELTA 3 Classic.
Can it keep only the essentials running? The EcoFlow DELTA 3 Max Plus lets you choose which outlets stay powered; EcoFlow lists no such feature for the EcoFlow DELTA 3 Classic.
Does it work as a UPS? Both switch in 10ms; StorageReview measured 8ms on the EcoFlow DELTA 3 Max Plus.
Does it prepare for storms? Both charge ahead of severe weather once Storm Guard is turned on in the EcoFlow app.
Can it charge off-peak? Both charge off-peak and discharge at peak rates with Self-Powered Mode and Scheduled Tasks.
How does the app connect? Both use the EcoFlow app over Wi-Fi and Bluetooth, with the OASIS dashboard.
Warranty and support
EcoFlow gives the EcoFlow DELTA 3 Classic and the EcoFlow DELTA 3 Max Plus the same deal: 3 years, plus 2 more once registered in the EcoFlow app.
Same 5 years at best on both, if you register on day one.Subject to each brand’s warranty terms and eligibility.
EcoFlow publishes no cycle count for either on its US pages: it quotes 10 years of reliable power for the Classic and about 10 years of use for the Max Plus. Calendar aging and heat also reduce capacity.
- Register whichever you choose in the EcoFlow app the day it arrives: without registration, the warranty stops at 3 years.
What reviewers report
We have not lab-tested these two units. Here is what 6 published reviews found, with the source, author and date for each point. Reviews of UK and EU units are flagged: those models charge from 230V outlets and have different sockets, so their charge times and outlet findings don’t carry over to US units.
DELTA 3 Classic: Basic Tutorials (March 2026, EU unit)DELTA 3 Max Plus: StorageReview (September 2025), The Technology Man (January 2026, UK unit), Trusted Reviews (January 2026, UK unit), T3 (January 2026), AndroidGuys (November 2025)
Usable capacity
- ClassicReviewer At over 1,800W the battery ran from full to 0 percent in just over 30 minutes. Basic Tutorials, Simon Lüthje, March 2026, EU unit
- Max PlusReviewer A full discharge delivered 1.64kWh from the 2,048Wh pack, about 80 percent. StorageReview, Dylan Dougherty, September 2025
- Max PlusReviewer A constant 2kW heater load ran just over 57 minutes and delivered 1,898Wh, about 93 percent. The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer Discharge efficiency hovered around 87 percent at loads from 200W to 3,000W. Trusted Reviews, David Ludlow, January 2026, UK unit
- Max PlusReviewer Best round-trip efficiency, AC in to AC out, was 79.9 percent. Trusted Reviews, David Ludlow, January 2026, UK unit
Charging
- ClassicReviewer A full wall charge took just under 55 minutes on the European unit (1,400W AC input). Flag: 230V charging. Basic Tutorials, Simon Lüthje, March 2026, EU unit
- Max PlusReviewer Refilling from empty took 2.33kWh from the wall, about 88 percent charging efficiency. StorageReview, Dylan Dougherty, September 2025
- Max PlusReviewer Fast mode reached 80 percent in 50 minutes and full in about 70 minutes on UK mains. Flag: 230V, up to 2300W input. The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer Charging at 2,400W took 2,317Wh of input to fill the battery, 88.39 percent efficient. Flag: UK 230V input. Trusted Reviews, David Ludlow, January 2026, UK unit
- Max PlusReviewer The reviewer confirmed roughly 80 percent in about 47 minutes on AC. Likely UK unit (2,300W input quoted). T3, Matt Kollat, January 2026
Noise and heat
- ClassicReviewer Battery temperature in the app climbed from 35 to 53 degrees C during the high-load grill test, with audible fans. Basic Tutorials, Simon Lüthje, March 2026, EU unit
- Max PlusReviewer Even charging at full power, the meter barely registered above room noise at one metre; exhaust measured just over 40°C. The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer Fans almost never came on with a home office load and stayed silent during a brief spike over 3kW. T3, Matt Kollat, January 2026
UPS and output
- ClassicReviewer It held about 1.83kW of output on an electric grill from full down to empty, with no drop in power. Basic Tutorials, Simon Lüthje, March 2026, EU unit
- Max PlusReviewer Measured UPS transfer time was 8ms on a workstation load. StorageReview, Dylan Dougherty, September 2025
- Max PlusReviewer Oscilloscope measurement showed a clean handover at 8.4ms; a desktop PC under benchmark load stayed on. The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer Inverter idle draw with no load was about 22W (100 to 87 percent in 12 hours). The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer DC output via the Anderson port delivered 1,892Wh on a 20A load, about 92 percent. The Technology Man, Gidon, January 2026, UK unit
- Max PlusReviewer Notes user reports that some desktop PCs and NAS devices still reboot on switchover, despite the sub-10ms claim. AndroidGuys, Scott Webster, November 2025
Daily use and issues
- ClassicReviewer There is no 12-volt car socket for DC devices like cool boxes. Basic Tutorials, Simon Lüthje, March 2026, EU unit
Practical limits before you buy
- The Classic has no 12V socket and no Anderson port. Basic Tutorials flagged it for cool boxes and other DC gear.
- The Classic can’t be expanded. It has no XT150 port for an extra battery.
- The Classic’s surge figure differs: 3,000W in its manual, 3,600W on its product page. Plan on the lower one.
- The Max Plus weighs 48.7 lb. Plan where it lives before an outage.
- On the Max Plus, two extra batteries need EcoFlow’s Expansion Adapter.
- The Max Plus’s Anderson port and car socket share 378W.
- X-Boost is for heating loads only. Motors need the continuous rating: 1,800W or 3,000W.
- Register either one in the app for the full 5 years; without it, 3.
Frequently asked questions
What is the difference between the EcoFlow DELTA 3 Classic and the DELTA 3 Max Plus?
The Max Plus stores 2,048Wh against 1,024Wh, delivers 3,000W against 1,800W, adds a car socket, a 30A Anderson port and a second solar port, and takes extra batteries to about 10kWh. The Classic weighs 26.6 lb against 48.7 lb.
Can the DELTA 3 Classic be expanded?
No. It has no extra battery port. The Max Plus takes up to two Max Plus extra batteries.
Does the DELTA 3 Classic have a 12V car outlet?
No. 12V devices run from its AC outlets through their own adapters. The Max Plus has a 12V car socket and a 30A Anderson port.
How long will each run a refrigerator?
At a 60W average: about 14.5 hours on the Classic and 29 hours on the Max Plus.
Which charges faster from the wall?
The Classic reaches 80% in 45 minutes and is full in about an hour at 1,400W; the Max Plus reaches 80% in 64 minutes at 1,800W.
Can the Classic run a microwave?
Yes, a 1,100W microwave runs on its 1,800W inverter, for about 47 minutes on a full battery. A microwave and a coffee maker together need the Max Plus.
Do they have the same warranty?
Yes: 3 years, extended to 5 when registered in the EcoFlow app.
Is there a middle option?
The DELTA 3 Plus: 1,024Wh and 1,800W like the Classic, but with six outlets, a car socket, 1,000W of solar, an IP65 battery pack and expansion to about 5kWh, at 27.6 lb.
Related comparisons and reviews
How we compared and sources
Research-based comparison. We have not physically tested these two units. Specs come from the EcoFlow US product pages, the two user manuals and the EcoFlow US warranty table; usage observations are attributed to named reviewers. Prices and availability were checked on October 31, 2026.
- Specs: EcoFlow US, DELTA 3 Classic and its user manual (EF-DL3-C), and EcoFlow US, DELTA 3 Max Plus and its user manual (EF-DL3-MP), read on October 31, 2026; warranty terms from the EcoFlow US warranty policy.
- Reviewer reports on the DELTA 3 Classic: Basic Tutorials, Simon Lüthje, March 2026, EU unit; on the DELTA 3 Max Plus: StorageReview, Dylan Dougherty, September 2025, The Technology Man, Gidon, January 2026, UK unit, Trusted Reviews, David Ludlow, January 2026, UK unit, T3, Matt Kollat, January 2026, AndroidGuys, Scott Webster, November 2025.
- Runtime = capacity × 0.85 ÷ watts. Solar harvest = min(panel watts, max input) × sun hours × 0.70. Cost per lifetime kWh = price ÷ (cycles × capacity in kWh).
The Max Plus doubles the battery, adds 1,200W, 12V outputs and expansion; the Classic is 22.1 lb lighter. Prices sit $670 apart.
Prices checked November 5, 2026 at 7:29 AM EST
Looking at other models? Browse all power station comparisons, or pick any two models on the hub and we point you to the right duel.
Originally published: November 5, 2026