Head-to-head test
EcoFlow DELTA 3 Ultra Plus vs EcoFlow DELTA Pro
EcoFlow DELTA 3 Ultra Plus vs EcoFlow DELTA Pro: buy the DELTA 3 Ultra Plus, which is cheaper, lighter and rated for more cycles, unless a single outage needs more than its 2,611Wh of usable capacity and you won't add a battery.
Full profiles: EcoFlow DELTA 3 Ultra Plus β Β· EcoFlow DELTA Pro β
Looking for a different matchup? EcoFlow DELTA 3 Ultra Plus vs DELTA Pro 3 Β· EcoFlow DELTA 3 Ultra vs DELTA Pro
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The first number I look at on these two is the weight. The DELTA Pro is 99 pounds. The DELTA 3 Ultra Plus is 74.3. One determined adult can get the lighter one into a truck bed. The heavier one needs a ramp or a neighbour.
Underneath, they're close to the same machine, with the same inverter, surge peak, solar ceiling and warranty. The Pro holds 528Wh more per charge. The Ultra Plus is rated for 500 more cycles, so over the full life of the cells the two deliver energy within about 2.5% of each other.
That leaves the Pro with one kind of buyer: the person whose longest outage needs more than the Ultra Plus can give in one go, and who doesn't want to add an expansion battery. For everyone else, the Ultra Plus costs $300 less and is the easier one to move.
What the Numbers Reveal
Each conclusion stated first β the numbers behind it on one line, the full analysis below.
rated cycles
Spread each price over that lifetime energy and you get $0.13 per kilowatt-hour for the Ultra Plus and $0.15 for the Pro. The extra money buys the same energy in bigger servings.
DELTA 3 Ultra Plus: 3,072Wh at 4,000 cycles works out to 12,288 kWh of lifetime energyDELTA Pro: 3,600Wh at 3,500 cycles works out to 12,600 kWh$1,599 against $1,899
Why it mattersFor a decade of outages, cost per lifetime kilowatt-hour favours the Ultra Plus.
The risk of buying the newer unit is covered for exactly as long as the risk of buying the older one, and the newer one is rated for more cycles.
Every entry in the Ultra Plus's evidence file comes from review sites, mostly short-term tests, with no long-term owner reports foundA0Reviews of the DELTA Pro line describe months of service as primary home backup through repeated overnight outagesB3Both units carry the same five-year warranty
Why it mattersIf the Pro's service record draws you, the extra money buys the same warranty, fewer rated cycles and a heavier box.
The specific dimensions that decide these two units β everything else is a tie.
Lifetime Value
Selected because: Cost per lifetime kilowatt-hour favours the Ultra Plus.
cost / lifetime kWh
Spread each price over the energy the battery is rated to deliver and the Ultra Plus comes to $0.13 per kilowatt-hour, the Pro to $0.15. The lower price is what wins that row. The extra cycles nearly erase the Pro's capacity lead.
Cycled daily, the Ultra Plus's rating lasts about 11 years and the Pro's about 9.6. The warranty stops at five years on both, so anything past that is on your own money.
Runtime: Will It Power Your Gear?
Selected because: The case for the Pro is 449Wh of extra usable capacity.
Take off the flat derate we apply for conversion losses and you get about 2,611Wh usable on the Ultra Plus and 3,060Wh on the Pro. The gap only matters if your biggest single outage lands inside it. Below it the two behave the same. Above it both fall short, and both accept an expansion battery.
Per watt-hour of storage, the two cost about the same on today's prices. The Pro wins only on how much you get from one charge.
Portability & Form Factor
Selected because: 74.3 pounds against 99, on two units with the same inverter, surge rating and solar input.
weight
Ninety-nine pounds is past lifting for most people. 74.3 pounds is still heavy, and one reviewer called 74 pounds thunderousA9. I'd carry the Ultra Plus down a step on my own. I wouldn't try that with the Pro.
The Ultra Plus stores about 41Wh per pound to the Pro's 36. On one garage floor forever, none of this matters. Down basement stairs or into a truck, the lighter one is easier every time.
Your Life, Your Pick
Selected because: The Pro wins one of six scenarios on reserve and neither covers Van Life Daily.
The Pro wins one of six scenarios, the camping weekend, on reserve alone. Both finish it. The Pro just has more left on Sunday morning.
Van Life Daily asks for 4,685Wh a day, which neither covers. The bigger box runs out a bit later.
What the Specs Don't Tell You
Selected because: A within-10ms against within-20ms handoff and two noise ratings that aren't like-for-like, both smaller than they look.
rated cycles
The Ultra Plus is rated to switch over within 10ms of a grid drop, the Pro within 20ms. One reviewer pulled the Ultra Plus off the wall mid-use and saw no dip or shut-offA6.
EcoFlow's two noise ratings needn't describe the same operating conditions, so the gap isn't a measurement. Reviewers describe the Ultra Plus as quiet even when pushed hardA1A2. Reviews of the wider Pro line, which may describe the newer Pro 3, mention a high-pitched fan whine under heavy drawB4.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra Plus
Strengths
- +Costs $300 less
- +Lighter by 24.7 lb
Trade-offs
- βNo major technical downsides compared to rival.
EcoFlow DELTA Pro
Strengths
- +Larger battery capacity
Trade-offs
- βSignificantly heavier (+24.7 lbs), making it harder to move.
- βVery heavy unit that may be difficult for one person to lift.
- βCan receive complaints about fan noise under heavy load.
Will It Power Your Gear?
Scenario math and per-appliance runtimes, modeled from the spec record.
Scenario verdicts
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
SCN-01 Β· 2 nights Β· needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
DELTA Pro
The Pro takes this one on reserve. A 2,100Wh weekend uses 69% of its usable capacity against 80% for the Ultra Plus, so both get you to Sunday and the Pro has more left. A camping weekend is also when the 25-pound difference gets lifted into a vehicle twice.
Battery budget usedlower = more headroom
LOADΒ Β Phone Charger 15WΓ6h Β· LED Lights 40WΓ8h Β· Box Fan 75WΓ14h Β· CPAP Machine 40WΓ16h
SCN-02 Β· 8 hours Β· needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Either unit
Both clear it with room to spare, using 63% of the Ultra Plus's usable capacity and 54% of the Pro's. The tiebreak is the handoff, rated within 10ms on the Ultra Plus against 20ms, which matters mainly to a desktop PC with no battery of its own.
Battery budget usedlower = more headroom
LOADΒ Β Fridge 150WΓ8h Β· Router + Modem 20WΓ8h Β· LED Lights (4 bulbs) 40WΓ6h Β· Phone Charger 15WΓ3h
SCN-03 Β· 8 hours Β· needs 320Wh
CPAP Overnight
Sleep therapy without interruption β the #1 medical use case
Either unit
A 320Wh night uses 12% of the Ultra Plus and 10% of the Pro, so either runs several nights on one charge. Both noise figures are EcoFlow's own ratings and may not describe a load this light, so they can't settle which is quieter at a bedside. Buy on price and weight here.
Battery budget usedlower = more headroom
LOADΒ Β CPAP Machine 40WΓ8h
SCN-04 Β· 8 hours Β· needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
Both power your workstation all day without strain. At these utilization levels the real difference is USB-C for direct laptop charging β 140W on the DELTA 3 Ultra Plus against 100W β which beats the inverter for convenience and wastes less energy.
Battery budget usedlower = more headroom
LOADΒ Β Laptop 60WΓ8h Β· External Monitor 30WΓ8h Β· Router + Modem 20WΓ8h Β· Phone Charger 15WΓ2h
SCN-05 Β· 4 hours Β· needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, weight is: at 74.3 lbs the DELTA 3 Ultra Plus is the one you'll be glad you brought. Fan noise under load is worth a listen too β it's audible in the lulls between songs.
Battery budget usedlower = more headroom
LOADΒ Β Blender 400WΓ0.5h Β· LED TV (55") 80WΓ4h Β· Bluetooth Speaker 15WΓ4h Β· Phone Charger (Γ3) 45WΓ2h
SCN-06 Β· 24 hours Β· needs 4,685Wh
Van Life Daily
A full day of mobile living β the ultimate endurance test
Neither unit
Neither does this. A 4,685Wh day is 179% of the Ultra Plus's usable capacity and 153% of the Pro's, so the bigger box runs out too, just later.
Battery budget usedlower = more headroom
LOADΒ Β Mini-Fridge 150WΓ24h Β· Laptop 60WΓ4h Β· Phone Charger 15WΓ3h Β· LED Lights 40WΓ5h Β· Fan 75WΓ8h
The Load Test
RUNTIME = (Wh Γ 0.85) Γ· LOAD
None of the scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA Pro runs 14.9h vs 12.7h.
$1,899 list Β· direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sizedΒ β
Modeled from the spec record β same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.ΒΉ
Essentials
The basics you need runningscale 0β204hComfort & Convenience
Makes off-grid life actually enjoyablescale 0β40.8hHigh-Draw Appliances
These reveal the real limitsscale 0β3.1hΒΉ Runtime = (capacity Γ 0.85) Γ· appliance watts. Within each group, all bars share one time scale (the group's longest runtime), so lengths are comparable across appliances; identical runtimes collapse into a single blue/orange bar. Actual runtime varies with battery age, temperature, and simultaneous loads β see methodology.
Conclusion
October 25, 2026
Verdict: the DELTA 3 Ultra Plus
Take the DELTA 3 Ultra Plus. It's $300 cheaper than the DELTA Pro, about 25 pounds lighter, and rated for 500 more cycles and a tighter switchover to battery. The Pro's extra 528Wh shrinks once you count cycles: over their rated lives the two deliver energy within about 2.5% of each other. The Pro suits a narrow buyer, someone whose single outage lands between 2,611Wh and 3,060Wh of usable capacity, or who wants a platform with months of outage duty on recordB3.
Today the DELTA Pro is $1,799, $100 under its typical $1,899. The verdict weighs typical prices, not today's. Prices checked 28 days ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of October 25, 2026. The links below open EcoFlow's current price.
$1,599.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
or check the DELTA Pro price$1,799.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester Β· Station Arena Test Desk Β· Updated October 25, 2026
Black Friday Β· 26 days out
Prices to beat:DELTA 3 Ultra Plus $1,499DELTA Pro $1,599
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): Tailgating.
Full specifications
α΅ Derived: price Γ· rated capacity. See the data behind our comparisons β
Comparison ToolAdd more power stations, side by sideOpen Tool βHow these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it β no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews β see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity Γ 0.85 inverter efficiency) Γ· device wattage. Solar recharge estimates assume panels deliver 70% of rated output. Cold weather, battery age, and stacked loads reduce real-world results.
Power Score
Computed from 14 published spec dimensions, weighted per use-case bench. Higher is better; a unit must meet a bench's minimum threshold to be rated.
See the full weight table and data sourcing on our methodology page βClass ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews β no buyer opinions feed it. We score every station on size-independent quality (value, output, portability, endurance, ports, warranty, and more), then percentile-rank it against the other units in its capacity class, so a class-leading compact unit and a class-leading whole-home unit can both earn 5β . Here, DELTA 3 Ultra Plus rates 4.9/5 (96th percentile of 28 Large-class units), and DELTA Pro rates 3.7/5 (26th percentile of 20 Home Backup-class units).
How the class ranking is computed βTest Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
74.3 lb and 99 lb: only one is a lift
Both are heavy. 74.3 pounds is a bent-knees, two-hands lift that one determined adult can manage. 99 pounds is a roll on flat ground, a ramp or a second person.
Two noise ratings, maybe two different tests
EcoFlow rates the Ultra Plus at 30dB and the Pro at 60dB. The ratings needn't describe the same load, so the gap isn't a measurement. Weight and usable capacity should decide this pair, with noise as a tiebreak at most.
Within 10ms against within 20ms
The Ultra Plus is rated to hand over within 10ms and the Pro within 20ms. A fridge, a router, lights and a CPAP won't notice either. A desktop PC with no battery of its own is the device that can trip on the slower handoff. Both figures are ratings, not lab results.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here.
Full record above β the Test Desk pick is the DELTA 3 Ultra Plus.
Check DELTA 3 Ultra Plus price βor check the DELTA Pro priceOwnership Analysis
What happens after you buy β true cost of ownership, brand trust, and growth potential.
Lifetime value
Service lifeyears at one full cycle per day
Lifetime energy delivered
Cost per delivered kWh
β warranty ends Β· Reaching the cycle rating means ~80% capacity remains β degraded, not dead.
Analyst note
Both units have similar long-term ownership costs ($0.13/kWh vs $0.15/kWh). The price difference is what you see on the sticker β neither is a hidden bargain or rip-off. One caution on the lifespan row: the DELTA 3 Ultra Plus takes longer to reach its cycle rating, but a cycle moves a different amount of energy on each unit β the DELTA Pro still delivers more over its shorter horizon (12,600 vs 12,288 kWh). Years measure wear, not usefulness.
Growth path
DELTA 3 Ultra Plus
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 3,072Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
DELTA Pro
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit β useful if your needs may climb past 3,600Wh.
Accepts up to 1,600W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are EcoFlow-specific. You're investing in the EcoFlow ecosystem.
Realistic full solar rechargeat 70% of rated panel output β see methodology
Analyst note
Both expand, so neither locks you out of growth β decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews β every claim cited to its source below.
EcoFlow DELTA 3 Ultra Plus
Everything on the Ultra Plus so far comes from professional reviewers, mostly working over days or weeks, and we found no long-term owner threadsA0. The build feels substantial down to the buttons and the AC cableA8. It doesn't cap its output to match the input wattage while charging, which many stations doA4. One reviewer ran a laptop, a desktop workstation and monitors through an eight-hour workday and finished with 40% leftA5.
A small complaint: the screen washes out in direct sunA7. We found no cold-weather accounts and nothing past short-term testingA0, so buy it on its specs and its warranty.
βeven when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Maxβ
Sources
thesolarlab.com Β· postperspective.com Β· appleinsider.com Β· digitaltrends.com Β· storagereview.com
EcoFlow DELTA Pro
The DELTA Pro has the service record the Ultra Plus doesn't. Reviews of the Pro line describe it as primary home backup across months of repeated overnight outagesB3, running a fridge, lighting and a space heaterB1.
A lot of online coverage mixes this unit up with the newer, heavier DELTA Pro 3B0, so weights and noise figures you find may not describe the box you're buying.
βLong regarded as a gold standard for home backup β designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.β
Sources
backuppowerhub.com Β· us.ecoflow.co Β· outdoorgearlab.com Β· bobvila.com Β· powerstationadvisor.com Β· robbsutton.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Professional reviewers consistently describe the fan noise as very quiet even under heavy load, comparable to EcoFlow's premium DELTA Pro Ultra line. [DELTA 3 Ultra Plus Β· 3 entries]
- Reviewers report solid UPS/pass-through charging performance with no noticeable switchover issues or output throttling tied to input wattage. [DELTA 3 Ultra Plus Β· 2 entries]
- The unit's high weight (~74 lbs) and premium MSRP are repeatedly flagged as drawbacks, though discounted street pricing is seen as making the value proposition much stronger. [DELTA 3 Ultra Plus Β· 3 entries]
- Build quality/durability is praised as substantial and non-fragile across multiple independent reviews. [DELTA 3 Ultra Plus Β· 2 entries]
- Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load. [DELTA Pro Β· 3 entries]
- A1
βeven when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Maxβ
thesolarlab.com β EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? Β· unknown Β· [positive]
- A2
βwe'd probably say the noise it creates is similar to what you hear when you run the DELTA Pro Ultra, which is pretty amazingβ
thesolarlab.com β EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? Β· unknown Β· [positive]
- A4
βMany power stations limit you to the input wattage when outputting power, but this EcoFlow power station does notβ
thesolarlab.com β EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? Β· unknown Β· [positive]
- A5
βI was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitorsβ
postperspective.com β Review: EcoFlow Delta 3 Ultra Plus Portable Power Station Β· 2026-04 Β· [positive]
- A6
βI didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wallβ
postperspective.com β Review: EcoFlow Delta 3 Ultra Plus Portable Power Station Β· 2026-04 Β· [positive]
- A7
βwhile facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen statusβ
appleinsider.com β EcoFlow Delta 3 Ultra Plus review: Premium, but solid power Β· 2025-11 Β· [mixed]
- A8
βIt does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durableβ
appleinsider.com β EcoFlow Delta 3 Ultra Plus review: Premium, but solid power Β· 2025-11 Β· [positive]
- A9
βWeighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standardsβ
appleinsider.com β EcoFlow Delta 3 Ultra Plus review: Premium, but solid power Β· 2025-11 Β· [mixed]
- B1
βLong regarded as a gold standard for home backup β designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.β
backuppowerhub.com / us.ecoflow.com β EcoFlow DELTA Pro review Β· 2025-2026 Β· [positive]
- B3
βReliable through extended outage use β served as primary backup across multiple overnight outages over months, powering essentials simultaneously; LFP battery rated for thousands of cycles and 10+ years of daily use.β
powerstationadvisor.com / robbsutton.com β DELTA Pro-line review Β· 2025-2026 Β· [positive]
- B4
βNot silent under heavy load β under 2000W-plus draws the fans emit a noticeable high-pitched whine that's distracting in a quiet room, though it runs quietly enough at lighter loads.β
outdoorgearlab.com β DELTA Pro-line noise testing Β· 2025-2026 Β· [negative]
Research compiled October 25, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra Plus if youβ¦
- βThe box will get moved: garage to porch, porch to truck. 74.3 pounds is the version of this you can handle alone.
- βYour worst single outage needs less than 2,611Wh. Below that line these behave the same, and one of them costs less.
- βYou plan to keep it a decade. The extra 500 rated cycles cost nothing extra at the register.
- βYou're protecting a desktop with no UPS of its own. This one is rated to hand over within 10ms.
Buy the DELTA Pro if youβ¦
- βYour single-outage need lands between 2,611Wh and 3,060Wh of usable capacity. Inside that narrow window the Pro clears it without an expansion battery.
- βThe unit will live in one place, a utility room or basement corner, and get wheeled twice a year at most.
- βYou want the platform with a track record. Reviews of the Pro line describe months of primary-backup dutyB3.
If neither fits
If your daily draw looks like the van-life number, 4,685Wh every day, neither of these is the answer. That's a wired house system with its own battery bank, or one of these plus expansion batteries, which changes the budget.
The Bottom Line
Take the DELTA 3 Ultra Plus. It costs less, it's lighter by a margin you feel every time it moves, and over its rated life it delivers within 2.5% of the bigger unit's energy. The Pro's 528Wh matters to one buyer: someone whose single outage needs more than 2,611Wh and who won't add a battery.
If that isn't you, the Pro asks for $300 more and 24.7 more pounds in return for reserve you'll mostly read off the display.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the DELTA Pro worth $300 more than the DELTA 3 Ultra Plus?
Only if you need more than 2,611Wh in one sitting. That's the Ultra Plus's usable capacity after our standard derate, against 3,060Wh for the Pro. Below that line the two behave the same, since they share a 3,600W inverter, a 7,200W surge rating and a 1,600W solar ceiling. Above 3,060Wh both fall short and you'd add an expansion battery either way.
Which one is quieter?
Probably the Ultra Plus, but the published figures can't prove it. EcoFlow rates the Ultra Plus at 30dB and the Pro at 60dB, and the two ratings may not describe the same load. Reviewers describe the Ultra Plus as quiet even when pushed hard. Reviews of the Pro line, which may include the newer Pro 3, mention fan whine under heavy draw.
Can either one run a whole house during a blackout?
Neither runs a whole house, but both run the essentials. An eight-hour outage modeled at 1,645Wh uses 63% of the Ultra Plus's usable capacity and 54% of the Pro's, so both finish with reserve. Whole-house backup means a transfer switch and a wired system.
How long will these last before the battery wears out?
Cycled once a day, the Ultra Plus's 4,000-cycle rating comes to about 11 years and the Pro's 3,500 to about 9.6. Few people cycle a 3kWh station daily, so both will likely outlast their five-year warranties by a long way. Total energy over the full rated life is close: 12,288 kWh against 12,600.
Should I buy an expansion battery instead of the bigger unit?
If the 449Wh capacity gap is the only thing pulling you toward the Pro, yes. Both take EcoFlow expansion batteries, so your ceiling depends on what you add later.
Related buying guides
Where to buy
EcoFlow DELTA 3 Ultra PlusPick
$1,599.00
$1,599.00 Β· direct from EcoFlow
Last checked 28 days ago. Prices move β check before you buy.
EcoFlow DELTA Pro
$1,799.00
$1,799.00 Β· direct from EcoFlow
down from $1,899 Β· 5% below usual
Last checked 28 days ago. Prices move β check before you buy.
Prices may vary by retailer and are subject to change.