Head-to-head test
EcoFlow DELTA 3 Ultra vs BLUETTI Apex 300
$600 cheaper, 95.8 lbs lighter, and $0.09 less per lifetime kWh — the plain DELTA 3 Ultra undercuts the Apex 300 by more than the Ultra Plus does, on a smaller starting price.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA 3 Ultra
5,362Power Score · The AC & Fridge Zone
$1,299.00 list · direct from EcoFlow
BLUETTI
Apex 300
5,062Power Score · The AC & Fridge Zone
$1,699.00 list · direct from BLUETTI
Spec deltas
The EcoFlow DELTA 3 Ultra costs $1,199. The BLUETTI Apex 300 costs $1,799 — $600 more for a unit that holds less usable capacity difference than the price gap would suggest, at 2,764.8Wh against the Ultra's 3,072Wh.
Then there's the lift. The Ultra weighs 77.2 lbs; the Apex 300 weighs 173 lbs, a 95.8-lb gap wide enough that owning both would mean two entirely different relationships with the word "portable." One popular science reviewer called even the Ultra's 74 lbs "hefty," softened by a telescoping handle and wheelsA14 — the Apex 300 gets no such softening at more than double that weight.
The Apex 300's rebuttal is solar: 2,400W of input against the Ultra's 1,600W. That's a real number for a specific buyer. For everyone else, $600, 95.8 lbs, and 15dB of fan noise are a lot to give up for it.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
The Apex 300's one genuine edge, a 2,400W solar ceiling against the Ultra's 1,600W, would need to save a serious amount of recharge time to justify $600 — a savings that only exists for buyers actually running a large panel array.
DELTA 3 Ultra costs $1,199 with a computed $0.10 per lifetime kWhApex 300 costs $1,799 with a computed $0.19 per lifetime kWh
Why it mattersAnyone not solar-charging at scale should treat the $600 gap as decisive on its own.
Reviewers of the Ultra describe its telescoping handle and wheels as making its own 74-ish lbs "effortless to cart around"A14, while Apex 300 testers report being unable to carry it more than a few feet or lift it onto a table without helpB8.
DELTA 3 Ultra weighs 77.2 lbsApex 300 weighs 173 lbs — 95.8 lbs more
Why it mattersAnyone moving this unit regularly — dock to cabin, truck bed to campsite — should weigh the near-96-lb gap as heavily as the $600.
Ultra reviewers describe its fans as never becoming annoying or distracting even at maximum inverter outputA2, while Apex 300 testers can only call its fans "relatively tame" compared to units that sound like small jet enginesB5 — a much lower bar, and still 15dB louder in the spec sheet.
Apex 300 rated 45dB under loadDELTA 3 Ultra rated 30dB under load — 15dB quieter
Why it mattersBuyers recharging overnight near a tent, bedroom, or RV bunk should weigh noise as heavily as price.
rated cycles
Both share the identical 5-year warranty, so the extra 500 cycles is real headroom past the warranty window rather than a paper spec that never gets tested.
DELTA 3 Ultra rated 4,000 cyclesApex 300 rated 3,500 cycles — 500 fewer
Why it mattersBuyers planning to run either unit for the long haul get more service life from the cheaper machine, not the pricier one.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: $600 price gap and near-double cost-per-kWh make this the clearest section on the page.
cost / lifetime kWh
The Ultra wins every line: $1,199 against $1,799 up front, $0.10 against $0.19 per lifetime kWh, and $240 against $360 per warranty-year. This is the widest price gap in the DELTA 3 Ultra lineup's comparisons against the Apex 300 — $600 rather than $300 — because the base Ultra skips the Ultra Plus's extra features and expansion port.
That gap holds even with the Apex 300's higher rated surge, 7,680W against 7,200W. Extra surge headroom is only worth paying for if you're actually starting something that needs it.
Portability & Form Factor
Selected because: 95.8-lb weight gap is the second-largest differentiator.
weight
Seventy-seven pounds moves with a telescoping handle and wheels that reviewers call effortless, with grab handles placed for the moments you do have to lift itA14. A hundred seventy-three pounds gets no such treatment — Apex 300 testers report being unable to carry it more than a few feet or lift it onto a table aloneB8.
The Ultra's own reviewers still call its 74-ish lbs "thunderous"A10, which is worth remembering: even the lighter unit here isn't light. It's simply the only one of the two built to actually be carried.
What the Specs Don't Tell You
Selected because: Weight, noise, and warranty value all fire, all favoring the Ultra.
rated cycles
The Apex 300 runs 45dB under load against the Ultra's 30dB, a 15dB gap that reads as the difference between background hum and a machine you notice is running. It's also the heavier unit by 95.8 lbs.
Warranty terms are identical at 5 years, so the $240-versus-$360 cost-per-warranty-year gap comes entirely from the sticker price and lifetime kWh math, not unequal coverage. The Ultra is simply the cheaper unit to insure against the same length of protection.
Growth Path
Selected because: Apex 300's solar ceiling is its one genuine edge — worth surfacing honestly.
solar input
Both units are expandable, so the shipped capacity isn't a permanent ceiling for either. The split is solar: the Apex 300 accepts up to 2,400W against the Ultra's 1,600W, an 800W gap that shortens recharge time for anyone feeding it from a serious panel array.
That's the Apex 300's one legitimate reason to exist in this matchup. Outside of solar-heavy setups, the 800W ceiling never gets used, and the Ultra's $600 price advantage and lighter chassis carry the day.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $400 less
- +Lighter by 6.6 lb
- +Larger battery capacity
Trade-offs
- –No major technical downsides compared to rival.
BLUETTI Apex 300
Strengths
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$400) than the DELTA 3 Ultra.
- –Very heavy unit that may be difficult for one person to lift.
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 · 2 nights · needs 2,100Wh
Weekend Camping
Two nights off-grid with essential comfort
Either unit
Both handle two nights comfortably. The Apex 300 uses 89% and the DELTA 3 Ultra uses 80%. With this little difference, pick based on weight and portability instead. The lighter unit wins for car camping.
Battery budget usedlower = more headroom
LOAD Phone Charger 15W×6h · LED Lights 40W×8h · Box Fan 75W×14h · CPAP Machine 40W×16h
SCN-02 · 8 hours · needs 1,645Wh
8-Hour Blackout
Keep the essentials running through a night without power
Either unit
Both survive the blackout with similar margin. Since the capacity difference doesn't matter here, focus on which unit has UPS mode — seamless switchover protects your router and PC from the split-second power gap.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
Both are wildly overqualified for CPAP. You're using 14% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
Both power your workstation all day without breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six 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 3 Ultra runs 12.7h vs 11.5h.
$1,299 list · direct from EcoFlow
Modeled from the spec record — same math as the tables below. Methodology
Runtime by appliance
Real-world runtime estimates for common appliances, modeled at 85% inverter efficiency.¹
Essentials
The basics you need runningscale 0–174.1hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–34.8hHigh-Draw Appliances
These reveal the real limitsscale 0–2.6h¹ Runtime = (capacity × 0.85) ÷ 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 — see methodology.
Conclusion
July 15, 2026
Verdict: the DELTA 3 Ultra
The DELTA 3 Ultra costs $1,199 against the Apex 300's $1,799 — a $600 gap — while also weighing 95.8 lbs less, running 15dB quieter, and carrying 500 more rated cycles. Its lifetime cost lands at $0.10 per kWh against the Apex 300's $0.19. The Apex 300's only real answer is a higher solar ceiling. A $600 price gap this wide, stacked on top of every other spec, isn't close enough for that one advantage to flip the verdict.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,299.00 list · direct from EcoFlow
or check the Apex 300 price$1,699.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 15, 2026
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
ᵈ Derived: price ÷ rated capacity. See the data behind our comparisons →
Comparison ToolAdd more power stations, side by sideOpen Tool →How these numbers are produced
Numeric verification
Every figure on this page traces to our spec database or arithmetic on it — no estimated numbers.
Owner claims
Statements about owner experience are cited to published reviews — see Sources & Research Notes below.
Runtime model
Runtime = (rated capacity × 0.85 inverter efficiency) ÷ 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 →Class ranking (the star rating)
Each unit's star score is a category ranking, not customer reviews — 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 5★. Here, DELTA 3 Ultra rates 5.0/5 (99th percentile of 25 Large-class units), and Apex 300 rates 4.9/5 (92nd percentile of 25 Large-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
Weight Reality Check
Neither unit is grab-and-go. The DELTA 3 Ultra (77.2 lbs) is manageable solo but heavier than a large checked suitcase. The Apex 300 (83.8 lbs) is noticeably heavier. That's a 7 lb difference.
Apex 300: 45dB Under Load
45dB is about as loud as a running refrigerator. If you're running a CPAP or sleeping near this unit, the fan noise may be noticeable. Most people find anything above 45dB disruptive for sleep.
Full record above — the Test Desk pick is the DELTA 3 Ultra.
Check DELTA 3 Ultra price →or check the Apex 300 priceOwnership Analysis
What happens after you buy — 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
│ warranty ends · Reaching the cycle rating means ~80% capacity remains — degraded, not dead.
Analyst note
The DELTA 3 Ultra wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while BLUETTI competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA 3 Ultra
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 3,072Wh.
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.
Apex 300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 2,765Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Generous port selection supports complex multi-device setups.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the Apex 300's higher solar ceiling (2,400W vs 1,600W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
There's no meaningful long-term owner-forum data on the plain DELTA 3 Ultra yet — it's a recent release, and available commentary skews toward professional reviewer testing, with some sources even blurring it together with the Ultra Plus variant, so this should be read as thin, launch-window coverage rather than seasoned ownership. Within that limit, reviewers consistently praise the UPS behavior: no observed dips or shutdowns when unplugged from the wallA6, and switchover that matches the instant response of dedicated APC battery backupsA5.
On handling, reviewers single out the telescoping handle and wheel design as making the Ultra's roughly 74-lb weight "effortless to cart around"A14, and call the build quality substantial rather than fragile — solid casing, buttons, and cableA9. One reviewer flagged an odd quirk where the unit's 30A port shuts down first under an overloadA3, worth knowing but not disqualifying.
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
Sources
thesolarlab.com · postperspective.com · appleinsider.com · digitaltrends.com · popsci.com
BLUETTI Apex 300
Apex 300 owner data is also thin — it shipped in late 2025, so what's available is community-forum troubleshooting and press testing rather than seasoned owner reports. The clearest pattern is app and firmware trouble: threads describe updates locking the unit into Backup modeB1, throwing Error 004 mid-chargeB2, and breaking Bluetooth or Home Assistant connectionsB3B4.
The app itself draws mixed reviews too — testers call it noticeably more sluggish than EcoFlow's or Anker'sB10 — and the missing front-facing ports mean a $300 Hub D1 accessory is effectively required for basic DC and USB accessB7B11.
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Reviewers consistently praise the quiet fan operation of the Ultra-tier unit compared to older EcoFlow models, though this is described in professional test conditions rather than long-term ownership. [DELTA 3 Ultra · 2 entries]
- UPS/switchover performance is repeatedly called seamless with no observed dips or shutdowns during power interruption tests. [DELTA 3 Ultra · 3 entries]
- The unit's substantial 74 lb weight is flagged across multiple reviews as a portability drawback, mitigated somewhat by wheels and handle design. [DELTA 3 Ultra · 2 entries]
- Build quality/durability (casing, cable, port covers) is repeatedly highlighted as premium and well-engineered. [DELTA 3 Ultra · 2 entries]
- Multiple owners report firmware updates causing app glitches, mode-lock issues, error codes, or Bluetooth/Home Assistant disconnects shortly after updating. [Apex 300 · 4 entries]
- Reviewers consistently flag the lack of built-in USB/DC ports as a design tradeoff requiring costly add-on accessories (Hub D1, Hub A1). [Apex 300 · 4 entries]
- The unit's extreme weight (~85 lbs) is repeatedly described as making it barely 'portable' and hard to carry alone. [Apex 300 · 2 entries]
- A2
“Even when you're pushing the inverter to its maximum output, the fans never become annoying or distracting.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- A3
“One weird thing we noticed was the fact that the unit always seems to shut down the 30A port first when you overload the unit.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [mixed]
- A5
“Over my career I have become accustomed to APC batteries immediately switching on when there is a power hit or power shut-off, and the EcoFlow Delta 3 Ultra Plus works in the exact same way.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A6
“I didn't experience any shut-offs or dips when I unplugged the EcoFlow from the wall.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A9
“It does not feel cheap or fragile. Everything from the outer shell case to the plastic buttons and the AC cable feels substantial and durable enough to withstand day-to-day wear and tear.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [positive]
- A10
“Weighing in at a thunderous 74 pounds, the Ultra is not considered lightweight by any standards.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [mixed]
- A14
“The sturdy telescoping handle and wheels make it effortless to cart around, and if you do have to lift its admittedly somewhat hefty 74 lbs, grab handles are well placed for the task.”
popsci.com — EcoFlow DELTA 3 portable power station series first impressions · 2025-09-29 · [positive]
- B1
“I updated my Apex 300 to the latest firmware yesterday. Now it's stuck in 'Backup' mode... Now when I go into the app to try to change it back, it flashes to...”
BLUETTI Community forum — 'Apex 300 stuck in Backup mode after last firmware update' · 2025-11 · [negative]
- B2
“When the system reached 97% charge, I decided to install the firmware updates. After the update completed, the charging stopped and I received Error 004.”
BLUETTI Community forum — 'Error E004 Apex 300' · 2025-11 · [negative]
- B3
“I was using Bluetti-bt until the latest Bluetti firmware update. I then started having disconnects.”
GitHub bluetti-official/bluetti-home-assistant issue #95 — 'APEX 300 and Hub A! now working' · 2026-05 · [mixed]
- B4
“Problem is every time I connect to the power station it shows that I still have an update, and I need to tap to upgrade which then tells me I am up to date.”
BLUETTI Community forum — 'Check For Update App issue' · 2025-09 · [negative]
- B5
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [positive]
- B7
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [negative]
- B8
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table.”
T3 — 'Bluetti Apex 300 review: transform your off-grid life' · 2025-11 · [negative]
- B10
“The Bluetti app is still a little sluggish compared to the EcoFlow or Anker apps, but it lets you toggle power modes, monitor stats, and tweak settings from a distance.”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [mixed]
- B11
“That Bluetti D1 Power Hub that gives you your DC and USB ports costs about $300, which is a steep price for what you're getting.”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [negative]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →You want the lowest price in this comparison and a chassis you can move solo without a cart or a second person.
- →You're pricing this by total ownership cost; $0.10 per lifetime kWh against the Apex 300's $0.19 is not a close call.
Buy the Apex 300 if you…
- →You're building a large solar array and will actually use the extra 800W of input ceiling over the Ultra.
- →You've weighed the $600 price gap, the 95.8-lb weight gap, and the 15dB noise gap, and still want BLUETTI's ecosystem.
If neither fits
If your real need is a full van-life day, both fall short in a single charge — that draw runs around 4,685Wh, past the Ultra's 3,072Wh and well past the Apex 300's 2,764.8Wh. Look at a multi-battery or whole-home setup instead of choosing between these two.
The Bottom Line
The DELTA 3 Ultra beats the Apex 300 by a wider margin than its own Ultra Plus sibling does: $600 cheaper rather than $300, on top of being 95.8 lbs lighter, 15dB quieter, and rated for 500 more cycles. The Apex 300's only real answer is a higher solar ceiling, worth paying for only if you're actually building around it.
For most buyers this is a clean call — take the Ultra, and put the $600 you saved toward panels if you need them.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI Apex 300 worth $600 more than the EcoFlow DELTA 3 Ultra?
Not on the specs. The Apex 300 costs $1,799 against the Ultra's $1,199, weighs 173 lbs against 77.2 lbs, and runs 45dB under load against 30dB. Its one real edge is solar input — 2,400W against 1,600W — which only pays off for buyers running a large panel array.
How does the price gap compare to the Ultra Plus version?
It's wider. The base DELTA 3 Ultra costs $1,199 against the Apex 300's $1,799, a $600 gap, versus $300 for the Ultra Plus at $1,499. The base Ultra skips the Ultra Plus's extra features but keeps the same 3,072Wh capacity, 4,000-cycle rating, and 30dB noise level.
Which one is easier to carry?
The Ultra, by a wide margin. At 77.2 lbs with a telescoping handle and wheels, reviewers call it effortless to cart around. At 173 lbs, the Apex 300 is difficult for one person to carry more than a few feet.
Which one is quieter?
The Ultra, by 15dB — 30dB against the Apex 300's 45dB. Reviewers say its fans never become annoying or distracting even at maximum inverter output.
Does the Apex 300 have a real advantage here?
Yes, solar input — a 2,400W ceiling against the Ultra's 1,600W, an 800W edge that shortens recharge time for buyers with a large panel array. Outside of solar-heavy setups, that ceiling goes unused and the Ultra's lower price and lighter weight matter more.
Where to buy
EcoFlow DELTA 3 UltraPick
$1,299.00
$1,299.00 list · direct from EcoFlow
BLUETTI Apex 300
$1,699.00
$1,699.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.