Head-to-head test
EcoFlow DELTA 3 Ultra vs BLUETTI Apex 300
Everything here rides on how you put power back in: the Apex 300 swallows three times the solar the DELTA 3 Ultra can take, and if you're not feeding it that, you're paying $300 extra for a smaller, heavier, louder battery.
Full profiles: EcoFlow DELTA 3 Ultra → · BLUETTI Apex 300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
$1,399.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 1 day ago. Prices move — check before you buy.
Spec deltas
You get more battery for less money by buying the EcoFlow. The DELTA 3 Ultra is $1,399 for 3,072Wh; the Apex 300 asks $1,699 for 2,764.8Wh. Their PowerScores finish ten points apart, 5,072 to 5,062, so the spec sheet calls this a dead heat and the decision hides in about four places.
One of those places justifies the whole premium. The Apex 300 takes three times the panel input, 2,400W against 800W, and it accepts expansion batteries where the EcoFlow is sealed at 3,072Wh. Its inverter runs bigger too, 3,840W continuous and 7,680W surge against 3,600W and 7,200W, though 240W of headroom is a difference you'd have to build a load around to notice.
The other two places run the other way. The BLUETTI weighs 83.78 lb against 72.1, an 11.68 lb difference you feel at the tailgate and again on the stairs; and it's rated 45 dBA under load against 30. Cycle life goes the BLUETTI's way, 6,000 against 4,000. It also keeps DC and USB off the box entirely. Those live on a Hub D1 you buy separatelyB7B11, so the number on the page isn't the number you'll pay. Both switch over in 10 ms and both carry five years of warranty, so nothing about backup duty separates them.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
solar input
That gap only turns into money when one charge isn't enough, and the engine finds exactly one load like that. A 4,685Wh van-life day overruns both batteries, so the box has to refill while you're still drawing from it. In that loop the EcoFlow's input ceiling is a wall you hit every afternoon, and the extra capacity it's carrying doesn't get you over it.
DELTA 3 Ultra: 3,072Wh capacity, 800W maximum solar inputApex 300: 2,764.8Wh capacity, 2,400W maximum solar inputVan Life Daily draws 4,685Wh: 179% of the DELTA 3 Ultra's usable capacity and 199% of the Apex 300's, so neither covers it on one charge
Why it mattersIf you live off panels, the Apex 300 hands back an afternoon every day you're out. If a wall outlet or a truck is ever part of the plan, you're paying for a number you'll never reach.
rated cycles
The build you're paying $700 extra for is also the one that runs dry first. Across their rated lives that's eighteen cents a kilowatt-hour against eleven, and that figure is calculated before the hub is bolted on, so every dollar of the Hub D1 pushes it further the wrong way.
Apex 300 $1,699 against DELTA 3 Ultra $1,399The Apex 300's DC, USB and Anderson ports come from the separately sold Hub D1, about $300B7B11Rated lifetime output: 4,000 cycles × 3,072Wh = 12,288 kWh, against 6,000 cycles × 2,764.8Wh = 16,589 kWh
Why it mattersIf USB and 12V gear plug straight into your power station, price the Apex 300 at $1,999 and ask what the extra buys. Outside of solar input, it's a slightly bigger inverter.
Fan noise tracks load, and a CPAP is close to the lightest work either machine will ever do, so the fifteen decibels between their ratings is a ceiling rather than a nightly reality. It still decides where the thing lives. One of these can sit in the hallway outside the bedroom, the other belongs behind a door, and the one behind the door costs more.
DELTA 3 Ultra rated 30 dBA; Apex 300 rated 45 dBA under loadA CPAP night draws 320Wh: 12% of the DELTA 3 Ultra's usable capacity, 14% of the Apex 300'sAn 8-hour blackout draws 1,645Wh: 63% and 70% of usable capacity, both switching over in 10 ms
Why it mattersIf it's running a CPAP or backing up a bedroom, take the EcoFlow and stop reading. Quieter and cheaper point the same direction exactly once in this comparison, and this is it.
For a machine bought to sit on standby and take over by itself, the failure that hurts isn't a dead cell in year eight. It's an update that leaves it in the wrong state on an ordinary Tuesday. Both units carry five years of coverage, so what actually differs is who picks up: EcoFlow answers a US phone line, BLUETTI answers by email across a large time difference.
Owners report firmware updates locking an Apex 300 in Backup mode with the app unable to change itB1, halting a charge at 97% with Error 004B2, and dropping Bluetooth and Home Assistant connectionsB3B4BLUETTI's support is email-first with China-timezone delays, and its own risk profile names support inconsistency as the top concernReviewers describe the DELTA 3 Ultra's switchover as indistinguishable from a dedicated UPS, with no dips or shutdowns when wall power is pulledA5A6
Why it mattersIf this is the house's backup and nobody in the house wants to debug it, the EcoFlow is the lower-maintenance half of this pairing. If you buy the BLUETTI anyway, buy it direct, where support goes better.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: You're paying $300 more for the battery that stores less and quits first.
cost / lifetime kWh
The sticker gap is the smaller half of this story. Spread across the five years each machine is covered for, the EcoFlow costs $260 a year and the BLUETTI $340, and that's before the hub carrying the BLUETTI's DC and USBB7B11. The cheaper box is also the one rated to deliver more energy before it dies, which is an unusual direction for a price gap to run.
Now the part that cuts against this whole section: almost nobody reaches these cycle counts. At weekend-only use the EcoFlow is rated 38.5 years out and the BLUETTI 57.7, and you'll have replaced both for reasons that have nothing to do with cycles. Cycle life will never be what retires either one. What you paid will, which makes the per-kWh figure a sanity check on the sticker rather than a forecast. So buy on the sticker, and notice which sticker is smaller.
Growth Path
Selected because: Only the Apex 300 grows, and its first expansion battery is largely spent catching up to a capacity the EcoFlow ships with.
solar input
Bolt the first expansion battery onto an Apex 300 and most of it goes to buying back ground. It starts at 2,764.8Wh against the DELTA 3 Ultra's 3,072Wh, so 307.2Wh of that new pack is spent drawing level with a machine that shipped that way. The growth path is real. It just starts from behind.
It pays above 3,072Wh, and there the case gets strong fast. A 4,685Wh day is past both machines, so if that's where your loads are heading, buy the platform that can follow and budget the roughly $699 parallel box for the day you want two of them working togetherB12. If your draw is going to sit where it is, you're being sold an upgrade path to a place you already are.
What the Specs Don't Tell You
Selected because: The scores tie, so weight, fan noise and a fixed ceiling are what's left to decide it.
rated cycles
None of the three cards firing here is about performance, because performance is where these two tie. They're about living with the thing: what it takes to move it, what it sounds like in the room, and whether it can ever be more than it is. Weight lands on both units. Noise and the fixed ceiling split one apiece, one against each machine.
Read them against your floor plan rather than against each other. The noise rating matters if the box lives where someone sleeps and evaporates if it lives in a garage. The ceiling matters only if you can name the appliance that pushes you past 3,072Wh. Most people answer the first question in a second and can't answer the second at all, which is most of why this comparison lands where it does.
Your Life, Your Pick
Selected because: Five of the six loads fit inside both boxes. The sixth fits in neither.
Both boxes clear five of the six loads without breathing hard, and that's the useful finding. A camping weekend takes 80% of the EcoFlow's usable charge against 89% of the BLUETTI's; a 910Wh workday and a 670Wh tailgate barely register on either. The ranking never changes because the capacity gap never changes, so read this table as proof that both are oversized for ordinary use rather than as a scoreboard.
The sixth load is the one worth reading twice, and it beats both of them. A 4,685Wh van-life day runs to 179% of the EcoFlow's usable capacity and 199% of the BLUETTI's, which turns full-time van power into a refill problem instead of a capacity problem. That is the one place the Apex 300's solar ceiling and its expansion port are worth real money, and it's the only place.
Brand Trust
Selected because: Both carry five years of coverage, so the difference is who answers in year three, and how long you wait.
What you'll actually feel from these two brands is the wait. EcoFlow picks up a US phone line, and its record splits hard: some claims close with a prepaid label in the mail, others turn into long waits and a refurbished unit where a new one was asked for. BLUETTI's channel is email-first across a large time difference, and BLUETTI's own risk profile puts support inconsistency at the top of its list. Buy BLUETTI direct rather than through a marketplace and the odds improve enough to be worth skipping a marketplace discount for.
EcoFlow's ledger isn't clean either. The October 2025 DELTA Max 2000 recall for overheating and fire risk, six incidents, sits on its record, and once the warranty lapses EcoFlow sells you neither parts nor service. BLUETTI's version of that problem is discontinued models going unrepairable for want of spares. Five years of coverage each, so perfection isn't the question here. Reachability is, and only one of these two is answering a US phone line.
Strengths & trade-offs
EcoFlow DELTA 3 Ultra
Strengths
- +Costs $300 less
- +Lighter by 11.7 lb
- +Larger battery capacity
Trade-offs
- –Shorter-lived battery — rated for 4,000 charge cycles vs the Apex 300's 6,000, so it wears out sooner.
BLUETTI Apex 300
Strengths
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+11.7 lbs), making it harder to move.
- –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
Either box covers a 2,100Wh weekend and neither covers two of them. It's 80% of the EcoFlow's usable charge against 89% of the BLUETTI's, so both come home close to empty and a third night is a fantasy in both cases. Break the tie at the tailgate: one of these you can wrestle up there alone, and the other one you'll be asking someone for help with.
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 ride out a 1,645Wh night with charge to spare, 63% of the EcoFlow's usable capacity against 70% of the BLUETTI's, and both hand over fast enough that nothing on the shelf reboots. The tiebreak is where the box is allowed to live. The quieter one sits in the hallway; the louder one gets exiled to the garage, which is a long walk at 2 a.m. when something starts beeping.
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
DELTA 3 Ultra
A CPAP night is 320Wh, 12% of the EcoFlow's usable capacity and 14% of the BLUETTI's, so both could run the machine for several nights on one charge. Capacity isn't deciding this. The fan is, and the EcoFlow is the quieter box by fifteen decibels, which is the spec you care about at arm's length in the dark.
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 strain. At these utilization levels the real difference is USB-C for direct laptop charging — 140W on the DELTA 3 Ultra against 100W — which beats the inverter for convenience 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, weight is: at 72.1 lbs the DELTA 3 Ultra is the one you'll be glad you brought. Fan noise under load is worth a listen too — it's audible in the lulls between songs.
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 box covers a 4,685Wh day. That's 179% of the EcoFlow's usable capacity and 199% of the BLUETTI's, which turns full-time van living into a refill problem rather than a purchase. This is the one profile where the Apex 300's much larger solar ceiling and its expansion port earn the premium, because the EcoFlow's input can't close a hole that size before sunset.
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 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.
$1,399 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
August 2, 2026
Verdict: the DELTA 3 Ultra
Buy the DELTA 3 Ultra at $1,399 unless the sun is your main outlet. It holds more, it's 11.68 lb lighter, it's quieter under load, and it costs $300 less. On cycle life the Apex 300 is the longer-lived unit, 6,000 against 4,000, though neither will be retired by cycles. The EcoFlow's DC and USB ports are attached to it; the Apex 300's arrive on a separately sold Hub D1B7B11, which puts a like-for-like build at $1,999. The BLUETTI earns that premium in exactly one situation: you charge off a serious panel array and your daily draw is climbing past 3,072Wh. In that life, 2,400W of solar input and an expansion port outrank everything above. In any other life, this isn't close.
Today the Apex 300 is $1,499, $200 under its typical $1,699. The verdict weighs typical prices, not today's. Prices checked 1 day ago.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of August 2, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,399.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
or check the Apex 300 price$1,499.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated August 2, 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 4.7/5 (80th percentile of 26 Large-class units), and Apex 300 rates 5.0/5 (99th percentile of 26 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.
Both Need Two Hands and a Plan
Neither of these is a grab-it-and-go box. Plan on a cart, a tailgate at the right height, or a second person, and plan on it every single time. The gap between them decides how often you'll want the help, not whether you'll want it. If this thing has to come up basement stairs regularly, both are the wrong size of machine and a smaller unit is the honest answer.
Apex 300: 45 dBA Under Load
That rating is a ceiling rather than what you'll hear on a light load, so a CPAP night won't push either unit's fans anywhere near it. What it decides is where the box can live. In a bedroom or a small office you'll notice this one. In a garage, a utility room or an RV bay you never will. Pick the room first, then let this card matter or not.
DELTA 3 Ultra: Fixed at 3,072Wh
What you buy here is the ceiling. There's no expansion port, so outgrowing it means buying a second machine instead of a second battery, and that's a genuine reason to pause if your loads are climbing. Weigh it against where the other one starts, though. The Apex 300 begins below this number, so its first expansion battery is largely spent catching up rather than getting ahead. Expandability only starts paying above 3,072Wh.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Apex 300's figure is a maximum rather than a guarantee — it depends on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term.
Battery Lifespan in Real Years
The Apex 300 is rated for 6,000 cycles vs 4,000. In real life: at daily use, that's 16.4 vs 11 years. At weekend use (twice a week), it's 58 vs 38 years. After hitting the cycle limit, the battery doesn't die — it drops to ~80% of original capacity, which is still very usable.
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 is cheaper to buy, but the Apex 300 is cheaper to own. At $0.1/kWh over its lifetime vs $0.11/kWh, the Apex 300's higher cycle life and capacity make each dollar go further over the years.
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. At the very top of the range, the DELTA Pro Ultra platform stacks batteries and inverters into whole-home backup — a flagship path, not a line-wide feature.
Worth knowing
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 portable (Apex 300, 2764.8Wh). 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. LFP across the rest of the range, though rated cycle life spans 2,500 (EB3A) to 6,000, and it varies WITHIN the Elite range rather than tracking it — the Elite 300 and Elite 200 V2 are rated 6,000 while the Elite 30 V2, Elite 10 Mini, Elite 320 and Elite 400 are rated 3,000+ and the Elite 100 V2 4,000+, so check the specific model. 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
Five years of warranty each, so coverage isn't the separator. Reach is. One of these brands answers a US phone line and has the largest owner community in the category standing behind it when official support drags; the other is email-first across a large time difference and names support inconsistency as its own top risk. On the unit asking $300 more, that runs the wrong way.
Growth path
DELTA 3 Ultra
FIXED CAPACITYFixed at 3,072Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 800W of solar. Suitable for a 1-2 panel setup.
Generous port selection supports complex multi-device setups.
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
Don't read the Apex 300's expandability as a straight win here: it starts at 2,765Wh, below the DELTA 3 Ultra's 3,072Wh, so a first expansion battery largely buys back capacity the DELTA 3 Ultra already includes. It only pulls ahead if you'd grow past 3,072Wh — short of that, the DELTA 3 Ultra's larger fixed capacity is the simpler value.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA 3 Ultra
Everything known about this unit comes from reviewers who tested it, not owners who've lived a winter with it, so read it as early rather than settledA1A5A9. What's there is consistent on the part that matters for backup: pull the wall plug and nothing on the shelf notices. Testers describe switchover behaviour indistinguishable from a dedicated UPS, with no dips and no shutdownsA5A6, and the inverter keeps delivering full output while it charges instead of throttling itself to whatever's coming inA4.
The rest reads like a well-built appliance. Fans stay unobtrusive with the inverter wide openA1A2, and the shell, the AC cable and the sliding covers over the rear inputs feel engineered rather than costedA9A15. The screen is the sore spot: in direct sun, one reviewer cupped their hands around it to read the statusA11. Two measurements worth taking into your own planning are a little over 4.5 hours at a 300–600W workstation drawA7, and a full eight-hour remote workday running a laptop, a desktop and monitors, finishing with 40% leftA8. One quirk before you wire anything permanent: overload it and the 30A port is the first thing to dropA3.
“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
The Apex 300's field record is short, and firmware dominates it. One owner's update left the unit stuck in Backup mode with the app refusing to switch it backB1. Another stopped a charge dead at 97% with Error 004B2. Bluetooth and Home Assistant connections dropped after updating as wellB3B4, and the app itself is described as sluggish next to EcoFlow's and Anker'sB10. There's no long-term ownership data here yet, only press testing plus a handful of forum and issue-tracker posts, so weigh all of it as early signal.
Physically it reads better than that. Fans are called relatively tame under load rather than jet-engine loudB5. The rubber bungs over the ports earn their keep in a dusty RV and irritate you the moment you try to seat an oversized plugB9. Weight is the recurring complaint: one reviewer could carry it only a few feet at a stretch and couldn't get it up onto a tableB8, while another calls it heavy but manageable thanks to handle placement and the modular battery designB6. The criticism that costs money is structural. DC and USB arrive on a separately sold hub rather than on the unit's faceB7B11, and linking two Apex 300s together takes a second, pricier boxB12.
“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]
- A1
“Even when you're pushing it hard, the DELTA 3 Ultra Plus runs much quieter than older EcoFlow models, like the DELTA 2 Max.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- 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]
- A4
“Many power stations limit you to the input wattage when outputting power, but this EcoFlow power station does not.”
thesolarlab.com — EcoFlow DELTA 3 Ultra Plus Review: The Ultimate DELTA? · 2025-09/10 (approx) · [positive]
- 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]
- A7
“Using Maxon's Cinebench 2026 GPU benchmark, I was pulling between 300W and 600W on one of the AC outputs... the EcoFlow Delta 3 Ultra Plus would last a little over 4.5 hours.”
postperspective.com — Review: EcoFlow Delta 3 Ultra Plus Portable Power Station · 2026-04 · [positive]
- A8
“I was able to work remotely for an eight-hour day with 40% power left, which included running my laptop, desktop workstation and monitors.”
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]
- A11
“But, while facing the sun, I had to employ the classic "cup hands cover" maneuver to get a clear look at the screen status.”
appleinsider.com — EcoFlow Delta 3 Ultra Plus review: Premium, but solid power · 2025-11-16 · [negative]
- A15
“I really love how the rear panel doors for the input ports slide into protective slots when in use.”
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]
- B6
“It's heavy, no question, but the handles and modular battery design make it manageable.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [mixed]
- 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]
- B9
“Each is protected by a rubber bung, which is good if you've got the Apex 300 below the sink in a utility room or RV. It can be annoying when it comes to inserting oversized plugs or adaptors, though.”
Trusted Reviews — 'Bluetti Apex 300 Review' · 2025-10 · [mixed]
- 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]
- B12
“Say you want to connect multiple Apex 300 power stations together, you'll need to buy the Bluetti Hub A1 Parallel Box, which retails for around $699!”
TheSolarLab — 'Bluetti Apex 300 Review: Cheap, Practical Home Backup?' · unknown · [negative]
Research compiled August 2, 2026.
Who Should Buy Which
Buy the DELTA 3 Ultra if you…
- →You want it in the house rather than the garage. An eight-hour blackout takes 63% of its usable charge, the handover is fast enough that nothing on the shelf reboots, and it's quiet enough to leave in a hallway.
- →You refill from a wall outlet or the truck between trips, which makes the one spec the BLUETTI clearly wins irrelevant to you.
- →It's running your CPAP. You'll use a fraction of the battery and spend the night an arm's length from the fan, and that's the entire decision.
- →You're buying for the decade, not the weekend: more capacity for less money, on the same five-year warranty, and ports you don't have to buy twice.
- →You plug USB-C, USB-A and 12V gear straight into the box, and you'd rather those ports came in the box.
Buy the Apex 300 if you…
- →Your roof or your ground array is the outlet. The BLUETTI hands back the afternoon the EcoFlow spends charging, every day you're out there.
- →You can name the load that takes you past 3,072Wh, and a 4,685Wh van-life day is the classic one. You'd rather add a battery than replace a machine.
- →You're building toward two units and you've already made peace with the parallel boxB12 and the hub that carries DC and USBB7B11.
- →Your load sits in the gap between 3,600W and 3,840W continuous, where the Apex 300's inverter is the difference between running and not running.
If neither fits
Anyone actually living in a van on a 4,685Wh daily draw should close this tab. That draw is past both machines, so either way you spend the day chasing the battery, and what you want is a wired house bank with an inverter/charger. Same answer if you'll be moving it alone and often: both of these are lift-with-your-knees objects, and a smaller unit you can carry one-handed to the site is the one that actually gets used. The big one stays in the trunk.
The Bottom Line
The cheaper box wins on nearly everything you'd notice living with it. It holds more, it's lighter, it's quieter, and its ports are attached to it rather than sold alongside it, which is what quietly turns the price difference into $700 for anyone who charges a laptop off their power station. Stack the Apex 300's bigger inverter, its longer 6,000-cycle rating and its better app scores on top of each other and you still haven't closed that.
The exception is narrow and it's real, so here it is once more. If the sun is how you refill, the Apex 300 swallows panel input the EcoFlow can't touch, and it's the only one of these two that can grow past 3,072Wh. Buy it for that job and you've bought the right machine. Everyone else buys the EcoFlow, spends the difference on panels, and gets on with the weekend.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI Apex 300 worth $300 more than the EcoFlow DELTA 3 Ultra?
Only if you charge mainly from solar. The Apex 300 takes 2,400W of panel input against the DELTA 3 Ultra's 800W and accepts expansion batteries, which is worth real money to anyone off-grid daily. On most of the rest the $1,399 EcoFlow is ahead: 3,072Wh against 2,764.8Wh, 72.1 lb against 83.78, and a 30 dBA rating against 45. Cycles are the exception — 6,000 on the Apex 300 against 4,000.
Which one recharges faster from solar panels?
The Apex 300, by about three to one. At full rated input it refills its 2,764.8Wh in a little over an hour (2,764.8Wh ÷ 2,400W), while the DELTA 3 Ultra needs roughly four hours to put back 3,072Wh at 800W. That only helps if you own enough panels to feed a 2,400W input, which is a substantial array rather than a couple of folding units.
Can you add extra batteries to the EcoFlow DELTA 3 Ultra?
No. It's a sealed 3,072Wh system with no expansion port, so outgrowing it means buying a second machine rather than a second battery. The Apex 300 does take expansion batteries, but it starts at 2,764.8Wh, so the first one spends 307.2Wh of itself simply matching what the DELTA 3 Ultra already holds. Expandability only pulls genuinely ahead above 3,072Wh.
Does the BLUETTI Apex 300 have USB and 12V ports built in?
Not on the unit itself. The Apex 300's face carries the AC outlets, while USB, DC and Anderson connections come from the separately sold Hub D1 at around $300. With that hub attached you get up to 100W over USB-C, the same ceiling the DELTA 3 Ultra offers from its own chassis. Budget for it if you charge phones, laptops or 12V gear directly off the power station.
Which is better for CPAP use or overnight bedroom backup?
The DELTA 3 Ultra. A CPAP night draws about 320Wh, which is 12% of its usable capacity against 14% of the Apex 300's, so neither is remotely stretched and capacity decides nothing. The tiebreaker is the fan: 30 dBA against 45 dBA. Both hand over in 10 ms, so neither will interrupt the machine when the grid drops.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA 3 UltraPick
$1,399.00
$1,399.00 · direct from EcoFlow
Last checked 1 day ago. Prices move — check before you buy.
BLUETTI Apex 300
$1,499.00
$1,499.00 · direct from BLUETTI
down from $1,699 · 12% below usual
Last checked 1 day ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.