Head-to-head test
EcoFlow DELTA Pro vs BLUETTI Apex 300
The DELTA Pro's case is 835Wh more battery for more money; the Apex 300 is cheaper, 15 lbs lighter, rated for 6,000 cycles to 3,500 and quicker to switch over, so the bigger tank only wins if you'll ride out outages on stored energy alone.
Full profiles: EcoFlow DELTA Pro → · BLUETTI Apex 300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Take the BLUETTI Apex 300. It costs $1,699 to the EcoFlow DELTA Pro's $1,899, and the DELTA Pro's case for the difference comes down to one number: 3,600Wh against 2,764.8Wh.
It's a good number. That extra 835Wh is why the DELTA Pro wins both scenarios that separate these two, and after an 8-hour blackout it still holds about twice the Apex's leftover energy. If you'll sit out outages with no panels, that's the whole argument, and it's worth paying for.
What the Apex 300 offers for less money is a longer list: 15 lbs less to lift, a ≤10ms switchover rating against ≤20ms, a 2,400W solar ceiling against 1,600W, and 6,000 rated cycles that make it the cheaper of the two per lifetime kWh. Its one real omission is ports: every USB and 12V/DC output needs the separately sold Hub D1B7B11. Unless stored energy is the whole job, the list still beats the number.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
That extra fuel shows up exactly where it should. After an 8-hour blackout the DELTA Pro still holds 1,415Wh usable against 705Wh, most of a second night against less than half of one. With no sun and no grid on day two, the bigger tank is the one still running the fridge.
DELTA Pro: 3,600Wh at $1,899Apex 300: 2,764.8Wh at $1,6998-Hour Blackout leftover: 1,415Wh usable (DELTA Pro) vs 705Wh (Apex 300)
Why it mattersBuyers who'll ride out outages on stored energy alone, with no panels, are the one group that should pay the premium for the DELTA Pro.
rated cycles
Where the ceiling counts is the owner who charges from panels every day. With an array big enough to max out both inputs, each full-sun hour banks 800Wh more on the Apex (2,400W minus 1,600W), and that same daily cycler is the one who'd run the DELTA Pro's pack to its rating in 9.6 years against 16.4. The solar and cycle advantages stack on exactly one buyer, and for that buyer it isn't close.
Solar input ceiling: 2,400W (Apex 300) vs 1,600W (DELTA Pro)8-Hour Blackout draws 1,645WhRated cycles: 6,000 (Apex 300) vs 3,500 (DELTA Pro); daily use reaches the rating in 16.4 vs 9.6 years
Why it mattersIf panels will charge this unit every day, take the Apex 300; if it waits in a closet for storms, its solar ceiling is a nice-to-have and the call is capacity against price.
The fussiest PC power supplies sit right at the 20ms line, which puts the DELTA Pro's rating on the edge and the Apex's comfortably inside it. Neither is a lab measurement, but for a desktop with unsaved work on pass-through, the cheaper unit is also the one with the safer class.
UPS switchover rating: Apex 300 ≤10ms, DELTA Pro ≤20msRemote Workday: both cover it, 30% used (DELTA Pro) and 39% (Apex 300)
Why it mattersAnyone leaving it plugged in under a desk as a battery backup for a desktop PC should take the Apex 300.
For a 12V compressor fridge in an RV, phones on a charging shelf or a laptop on USB-C, the Apex needs an extra purchase before it does what the DELTA Pro does as delivered, and reviewers call that hub a steep add-onB7B11. It eats into the saving for exactly the buyers who'd use those ports most.
DELTA Pro on the unit: 2 USB-C (100W), 4 USB-A, 1 12V car outletApex 300: USB and 12V/DC outputs come only through the separately sold Hub D1B7B11
Why it mattersAnyone who'll run 12V gear or charge devices over USB should price the Hub D1 into the Apex 300 before calling it the cheaper buy.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The Apex 300 is cheaper to buy and, on its 6,000 rated cycles, cheaper per kWh delivered; the DELTA Pro wins only on watt-hours per dollar at the shelf.
cost / lifetime kWh
The shelf and the long run point opposite ways here. Per watt-hour on the day you buy it, the DELTA Pro is the cheaper of the two. Per kilowatt-hour it will ever deliver, the Apex 300 is, at $0.10 against $0.15, because it costs less to begin with and its pack is rated for 6,000 cycles to 3,500.
Which column counts depends on your calendar. Cycle it daily off solar and the DELTA Pro reaches its rating in 9.6 years against the Apex's 16.4, so the cheaper sticker is also the longer-lived pack. Pull it out for storms and both ratings run decades past any plan you have for the unit, which leaves the Apex's win here as the simple one: it costs less.
Your Life, Your Pick
Selected because: Both scenarios that separate the two are capacity tests, and they are the DELTA Pro's whole case.
Count the rows and the DELTA Pro leads two to one, but look at what kind of rows they are. Both of its wins are capacity tests the Apex 300 also passes; the DELTA Pro just finishes them with more left in the tank. Nothing on this list is a load the Apex can't carry.
The Apex's own win, CPAP Overnight, rests on a published fan rating the two makers don't measure the same way, so read it as a lean rather than a result. Remote Workday and Tailgate are ties, Van Life Daily beats both, and the DELTA Pro's case ends up where the spec table started it: more fuel, for $200 more.
Growth Path
Selected because: Both expand, and the Apex 300's 2,400W solar ceiling against 1,600W is what an off-grid bank grows into.
solar input
Both take expansion batteries, so the DELTA Pro's capacity lead is a starting position rather than a ceiling the Apex 300 can't pass. What a battery can't change is the solar input. With an array big enough to max out both, every full-sun hour banks 800Wh more on the Apex, and that's the number a growing off-grid bank actually lives on.
One growth cost to know before planning a two-unit Apex setup: linking them in parallel takes BLUETTI's separately sold Hub A1, which one reviewer flagged as a pricey extraB12.
What the Specs Don't Tell You
Selected because: The Apex 300's tighter switchover rating and its missing USB and 12V outputs both sit here.
rated cycles
The switchover card is the Apex 300's quiet win. A ≤10ms rating against ≤20ms is the difference between a desktop PC that should ride through a grid drop and one sitting right at the line where fussy power supplies give up. Neither figure is a lab result, but if this lives under a desk, the Apex holds the safer class.
The honest catch on our pick: the Apex 300 has no USB or 12V output of its own. Phones, a USB-C laptop, a 12V fridge or anything with a car plug all wait on BLUETTI's separately sold Hub D1B7B11, while the DELTA Pro has those ports built in. Warranty and noise don't separate them: both carry five years (the Apex's when bought direct or registered), and the two fan ratings are published on different bases.
Portability & Form Factor
Selected because: 83.78 lbs against 99 is a real gap between two units that are both too heavy to carry far.
weight
Fifteen pounds is the Apex 300's margin, and it doesn't make the thing portable. At 83.78 lbs, one reviewer could hardly carry it more than a few feet and couldn't get it onto a tableB8. The DELTA Pro is heavier still at 99 lbs, so both are bent-knees, two-person lifts.
Reviews of the DELTA Pro line describe integrated wheels and a telescoping handle that work on smooth floors and want a cart on rough groundA2, though our research couldn't confirm that source covers this exact modelA0. If the unit goes down to the basement once and stays, weight barely matters. If it rides in a trunk, take the lighter one.
Strengths & trade-offs
EcoFlow DELTA Pro
Strengths
- +Larger battery capacity
Trade-offs
- –Significantly heavier (+15.2 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
- –Can receive complaints about fan noise under heavy load.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the Apex 300's 6,000, so it wears out sooner.
BLUETTI Apex 300
Strengths
- +Costs $200 less
- +Lighter by 15.2 lb
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –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
DELTA Pro
The DELTA Pro finishes the weekend with 960Wh still usable; the Apex 300 with 250Wh, a margin one extra device could eat. Both make it home. Only one of them lets you stop checking the battery app.
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
DELTA Pro
Both get you to morning. The DELTA Pro wakes up with 1,415Wh still usable, the Apex 300 with 705Wh: most of a second night against less than half of one. If the outage runs into day two without sun, that leftover is the whole difference.
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
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here. The only published difference is fan noise, and it can't settle this: the Apex 300 is rated 45dB and the DELTA Pro 60dB, but they are two makers' figures, each measured its own way. Neither settles which box is quieter at a bedside. Buy whichever is cheaper or easier to carry.
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
A tie on energy: both run the workstation all day, the DELTA Pro at 30% used and the Apex 300 at 39%. Break it on what's on the desk. A USB-C laptop plugs straight into the DELTA Pro, while the Apex 300 needs the laptop's AC charger or a Hub D1. A desktop PC on pass-through tilts the other way, toward the Apex's ≤10ms switchover rating over the DELTA Pro's ≤20ms.
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 83.8 lbs the Apex 300 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 carries a 4,685Wh day: the DELTA Pro comes up 1,625Wh short, the Apex 300 2,335Wh. At each unit's rated solar ceiling, either shortfall is about an hour of full input, a dead heat on paper as long as your roof can actually deliver 1,600W or 2,400W.
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 Pro runs 14.9h vs 11.5h.
$1,899 list · direct from EcoFlow
Planning for more than this? Describe your whole setup and get it sized →
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 0–204hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–40.8hHigh-Draw Appliances
These reveal the real limitsscale 0–3.1h¹ 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
October 11, 2026
Verdict: the Apex 300
The Apex 300 costs $200 less and gives up capacity and built-in USB and 12V outputs in return. Nearly everything else runs its way: it's 15 lbs lighter, rated for 6,000 cycles against 3,500 (which makes it the cheaper unit per lifetime kWh), takes 2,400W of solar against 1,600W, and carries the tighter ≤10ms switchover rating. The DELTA Pro's 835Wh lead is real and wins it both capacity scenarios, so buy it if you'll sit out outages on stored energy with no panels, or if you want USB and 12V ports on the box without buying a hub. Otherwise the Apex is more machine for less money.
Today the DELTA Pro is $1,799, $100 under its typical $1,899 and the Apex 300 is $1,599, $100 under its typical $1,699. 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 11, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,599.00 · direct from BLUETTI
down from $1,699 · 6% below usual
Last checked 28 days ago. Prices move — check before you buy.
or check the DELTA Pro price$1,799.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated October 11, 2026
Black Friday · 26 days out
Prices to beat:DELTA Pro $1,599Apex 300 $1,499
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
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 Pro rates 3.7/5 (26th percentile of 20 Home Backup-class units), and Apex 300 rates 4.9/5 (93rd percentile of 28 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.
15 lbs Lighter Is Still Not Light
The Apex 300 weighs 83.78 lbs, the DELTA Pro 99. That's a real 15 lb saving and still a lift you plan rather than do on a whim: both are heavier than a large checked suitcase, and both are two-person jobs on stairs.
Fan Noise: Two Published Ratings
The Apex 300 is rated 45dB (like a running refrigerator), the DELTA Pro 60dB (like a normal conversation). Neither is a measurement on a shared bench — they are two makers' figures, each measured its own way, so a low number and a high one can describe the same machine at different moments. Take the pair as a prompt to find hands-on reports rather than as a gap you can act on. For most people, fan noise around 45dB and up is where sleep starts to suffer, and neither figure tells you what either unit does at a 40W draw.
Apex 300: Power Lifting to 7,680W
The Apex 300 has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 7,680W from its 3,840W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool, and this record publishes no surge figure at all, so read the mode as a resistive-load feature rather than as starting ability. And it is not a reason to size down, because running a load that big from 2,765Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. The DELTA Pro publishes no equivalent.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The DELTA Pro is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
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.
6,000 Cycles vs 3,500: It Pays Daily Users
Cycle it every day and the Apex 300 reaches its rating in 16.4 years against the DELTA Pro's 9.6, delivering roughly 16,589 kWh against 12,600 along the way. Use it twice a week and the figures become 58 and 34 years, which nobody will test. Either way, a pack at its rating drops to about 80% capacity rather than dying.
Full record above — the Test Desk pick is the Apex 300.
Check Apex 300 price →or check the DELTA Pro 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 Apex 300 wins on both sticker price and long-term value. At $0.10/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. At the top of the range sit two whole-home paths: the TITAN line, one 5 kWh unit that grows to 30 kWh, and the DELTA Pro Ultra platform, which stacks batteries and inverters further — flagship paths, not line-wide features.
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
Neither brand's support is a reason to choose it: EcoFlow's record is polarized and BLUETTI's is the more inconsistent of the two. For both, the practical fix is where you buy. A retailer with a strong return policy, such as Costco or Amazon, backs up the DELTA Pro; buying the Apex 300 direct from BLUETTI tends to get better support and is also how it earns the full 5-year term.
Growth path
DELTA Pro
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — 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.
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.
Limited ports. You'll likely need a power strip or splitter.
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 Pro
Reviews treat the DELTA Pro line as a home-backup mainstay, running a fridge, lighting and a space heater through outagesA1. One long-running review used it as primary backup across multiple overnight outages over months, powering essentials at the same timeA3. That's months of duty, not an unboxing.
The recurring knock is fan noise under heavy load: one Pro-line test heard a distracting high-pitched whine above 2,000W of draw, with quieter running at lighter loadsA4. Read that, and the wheels-and-handle reportsA2, as the line's character rather than this exact unit's, because our research found much of the coverage blends the original DELTA Pro with the heavier DELTA Pro 3A0.
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
Sources
backuppowerhub.com · us.ecoflow.co · outdoorgearlab.com · bobvila.com · powerstationadvisor.com · robbsutton.com
BLUETTI Apex 300
Field data on the Apex 300 is thin: it's new, and most of what exists comes from press reviewers rather than long-term ownersB0. The one thread multiple owners share is firmware. Posts describe a unit stuck in Backup mode after an updateB1, an E004 charging error right after updatingB2, Home Assistant disconnectsB3, and an app that keeps offering an update it already installedB4. That's software friction to watch at update time, not a hardware pattern.
On the hardware, reviewers split by degree. One called the fans relatively tameB5 and the weight manageable thanks to the handlesB6; another could hardly carry it a few feet and couldn't lift it onto a tableB8. Two reviewers flag that USB and DC output arrive only through the separately sold Hub D1 and call it a steep extraB7B11. One found BLUETTI's app a little sluggish next to EcoFlow's, though it covers modes, stats and settingsB10, and another liked the rubber bungs over the outlets for a utility-room or RV install but found they fight oversized plugsB9.
“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
- Established home-backup platform with wheeled portability and massive expandability; the consistent knock is fan noise under heavy load. [DELTA Pro · 3 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
“Long regarded as a gold standard for home backup — designed for high-draw appliances and full-scale battery expansion, running home essentials like a fridge, lighting, and a space heater through outages.”
backuppowerhub.com / us.ecoflow.com — EcoFlow DELTA Pro review · 2025-2026 · [positive]
- A2
“Heavy but wheeled — integrated wheels and a telescoping handle help move its considerable weight, though they work best on flat, smooth surfaces; a cart is needed for uneven ground.”
outdoorgearlab.com / bobvila.com — DELTA Pro-line review · 2025-2026 · [mixed]
- A3
“Reliable through extended outage use — 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.”
powerstationadvisor.com / robbsutton.com — DELTA Pro-line review · 2025-2026 · [positive]
- A4
“Not silent under heavy load — 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.”
outdoorgearlab.com — DELTA Pro-line noise testing · 2025-2026 · [negative]
- 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 October 11, 2026.
What Owners Actually Report
Drawn from 170 comments on independent review channels — not from retailer reviews, which skew to the first week of ownership. Each line is our summary of one commenter's claim, linked to the original. We record what they said, including where it contradicts the spec sheet.
EcoFlow DELTA Pro
211 claims from 147 comments · 155 from owners · 39 with figures
- Price & value
- 37 · 26% negative
- Durability
- 22 · 73% negative
- Solar input
- 23 · 35% negative
- Runtime
- 18 · 23% negative
- Other
- 18 · 48% negative
What owners complain about
Bought October 2023, died June 2024.
Durabilitymeasuredownerafter 8 months25 agreedsource →
The 100 lb weight of the DELTA Pro is no joke.
Size & weightmeasuredowner14 agreedsource →
Even the 767's loudest fan state is far quieter than the DELTA Pro.
Noiseowner41 agreedsource →
What owners praise
Charges two DELTA Pros from two ~2,500W strings running at about 125V.
Solar inputmeasuredowner13 agreedsource →
Electric bill fell from $250 a month to between $26 and $44.
Price & valuemeasuredowner14 agreedsource →
Delta Pro with battery and 800W of solar keeps him fully off grid and happy.
Runtimeownerafter 8 months62 agreedsource →
BLUETTI Apex 300
36 claims from 23 comments · 18 from owners · 6 with figures
- Price & value
- 10 · 8% negative
- Solar input
- 6 · 53% negative
- Inverter & surge
- 2 · 0% negative
- Build quality
- 2 · 0% negative
- Runtime
- 2 · 100% negative
What owners complain about
TV, router, Tablo and Firestick drain it from 100% in 7-9 hours; runtime figures are lies.
Runtimemeasuredownersource →
Dropping to a 60V PV max is a deal killer versus the 150V per string they run on the AC300.
Solar inputowner1 agreedsource →
App is portrait-only.
App & firmwareownersource →
What owners praise
Two paralleled units give 7,680W and run dryer, 2-ton AC or oven plus fridges and sump pump.
Inverter & surgemeasuredowner5 agreedsource →
$2,600 for two units plus $659 for the Hub A1 was worth the extra over the Anker.
Price & valuemeasuredowner5 agreedsource →
Three Apex 300s with a Hub A1 give him 18kW solar input and 12kW output.
Solar inputmeasuredownerafter 1 months10 agreedsource →
Claims are weighted by how specific they are, whether the commenter owns the unit, and how many readers agreed. Comments that mention a product under a rival's review count for more, because the commenter had no reason to be there. This is what buyers report, not our test results — for measurements we ran ourselves, see the methodology.
Who Should Buy Which
Buy the DELTA Pro if you…
- →The no-panels storm prepper: you'll ride out outages on stored energy alone, and the DELTA Pro's extra 835Wh is most of a second blackout night.
- →Anyone who wants USB and a 12V socket on the box itself: the RV owner running a 12V compressor fridge, or the household charging phones and a USB-C laptop straight off it without buying a hub.
- →The buyer who wants the longer track record, since reviews describe the DELTA Pro line carrying primary backup duty across months of outagesA3.
Buy the Apex 300 if you…
- →The solar-every-day owner: 6,000 rated cycles make it the cheaper unit per kWh delivered, and with enough panels the 2,400W ceiling banks a sunny day faster.
- →The home-office worker who wants a desktop PC to ride through a grid drop on pass-through, where the ≤10ms rating is the safer class.
- →Anyone who has to move it now and then and would rather wrestle 83.78 lbs than 99.
- →The home-backup buyer who plugs everything in through AC anyway, wants the lighter, longer-rated unit for less money, and has no use for the extra watt-hours.
If neither fits
Close the tab if you're the full-time van dweller: Van Life Daily's 4,685Wh day leaves even the DELTA Pro 1,625Wh short, so look at a home-backup system with expansion batteries sized past your daily draw. The CPAP-only buyer should close it too, from the other direction: a night uses 14% of the Apex's usable capacity, and a much smaller unit carries it at a fraction of the weight.
The Bottom Line
Take the Apex 300. It costs $200 less, weighs 15 lbs less, and its 6,000 rated cycles make it the cheaper unit per kWh it will ever deliver. Add the tighter switchover rating and the higher solar ceiling, and it's the better home-backup machine wrapped around a smaller battery, provided you charge through AC or budget for the Hub D1.
The DELTA Pro's case is the battery itself: 835Wh more, which turns into most of a second blackout night when there's no sun to refill from. If that's your outage plan, pay the difference. If panels or a desk PC are anywhere in the picture, the Apex is the one to unbox.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the BLUETTI Apex 300 or EcoFlow DELTA Pro better for home backup?
The Apex 300 for most homes: it costs $200 less, carries the tighter ≤10ms switchover rating, and is rated for 6,000 cycles against 3,500. The DELTA Pro is the better pick if you'll ride out outages on stored energy alone, since its 3,600Wh battery finishes an 8-hour blackout with about twice the Apex's leftover energy.
Is the DELTA Pro's extra capacity worth the higher price?
Only if capacity is the job. The extra $200 buys 835Wh, which makes the DELTA Pro the cheaper of the two per watt-hour on the shelf. Over a rated life it flips: the Apex 300 works out to $0.10 per lifetime kWh against the DELTA Pro's $0.15, because its pack is rated for 6,000 cycles to 3,500.
Which lasts longer, the DELTA Pro or the Apex 300?
The Apex 300, on paper: 6,000 rated cycles against 3,500. Cycled daily, that's 16.4 years against 9.6 before either pack reaches its rating, and even then it drops to about 80% capacity rather than dying. At twice-weekly use both ratings run past 30 years, so cycle life only really separates them for daily users.
Does the BLUETTI Apex 300 have USB and 12V ports?
Not on the base unit. Its USB and 12V/DC outputs need BLUETTI's separately sold Hub D1; without it, everything plugs into the Apex 300's AC outlets. The DELTA Pro has two 100W USB-C ports, four USB-A ports and a 12V car outlet built in.
Which is quieter, the DELTA Pro or the Apex 300?
The published ratings can't settle it, because the two makers don't rate fan noise on the same basis. One reviewer called the Apex 300's fans relatively tame; one DELTA Pro-line test heard a high-pitched whine above 2,000W of draw, though that source may describe a sibling model. If it's going next to a bed for a CPAP, listen to either one before you commit.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA Pro
$1,799.00
$1,799.00 · direct from EcoFlow
down from $1,899 · 5% below usual
Last checked 28 days ago. Prices move — check before you buy.
BLUETTI Apex 300Pick
$1,599.00
$1,599.00 · direct from BLUETTI
down from $1,699 · 6% below usual
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.