Head-to-head test
EcoFlow DELTA Pro 3 vs BLUETTI Apex 300 + B300K
The Apex 300 + B300K is the cheaper unit and also the bigger, longer-rated battery, so whatever the DELTA Pro 3's premium buys, it isn't battery: it's the outlets on its face and EcoFlow's phone support.
Full profiles: EcoFlow DELTA Pro 3 → · BLUETTI Apex 300 + B300K →
Looking for a different matchup? EcoFlow DELTA Pro 3 vs BLUETTI Apex 300
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
The Apex 300 + B300K is the cheaper of these two by $200, and it's also the bigger battery: 5,529.6Wh against the DELTA Pro 3's 4,096Wh, 35% more. Cheaper and bigger rarely come in the same box. Here they come in two boxes, which is the catch, and a smaller one than it sounds.
The win isn't capacity alone. BLUETTI rates this pack for 6,000 cycles to EcoFlow's 4,000, so across its rated life the Apex bundle delivers about twice the energy of the DELTA Pro 3, for less money up front. On the battery itself, there is no trade to weigh.
The DELTA Pro 3 keeps a real case, just a narrow one. It's one 112.4 lb chassis with the small outlets built in: a 12V car socket the Apex bundle doesn't have, and two 240V outlets to its one. If you need those on the box, or you'd rather deal with EcoFlow's support than BLUETTI's, the premium buys them. If you don't, it buys very little.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
rated cycles
Fold capacity and cycle rating together and the Apex bundle is good for about 33,178 kWh over its rated life against the DELTA Pro 3's 16,384, roughly twice the energy for less money. The DELTA Pro 3's premium isn't paying for battery. It has to be paying for something else.
Apex 300 + B300K: 5,529.6Wh, rated 6,000 cyclesDELTA Pro 3: 4,096Wh, rated 4,000 cyclesthe Apex 300 + B300K is the cheaper of the two by $200
Why it mattersAnyone choosing on capacity, longevity or cost per kilowatt-hour can stop comparing and buy the Apex bundle.
Run an outage into a third evening and the DELTA Pro 3 goes flat early that night while the Apex bundle is most of the way through it. Outages don't announce their length in advance, and the bigger tank is the one that buys you time to find out.
8-Hour Blackout: Apex 300 + B300K finishes at 35% used with 3,055Wh left, 1.9 more nights like it8-Hour Blackout: DELTA Pro 3 finishes at 47% used with 1,837Wh left, 1.1 more nights like itVan Life Daily: DELTA Pro 3 is 1,203Wh short of the 4,685Wh day; Apex 300 + B300K passes with 15Wh left
Why it mattersIf you're buying for storms rather than brief flickers, the Apex bundle's extra night outweighs anything the DELTA Pro 3 adds.
With the Apex base at 38kg by one reviewer's countB14 and the B300K making up the rest, the BLUETTI's heaviest single piece is a smaller lift than the EcoFlow's whole chassis. The lighter unit on paper is the heavier one on the stairs.
DELTA Pro 3: 112.4 lbs in one chassisApex 300 + B300K: 148.8 lbs across a base station and an expansion batteryone reviewer puts the Apex 300 base alone at 38kgB14
Why it mattersIf you'll be carrying it into a basement, don't let the total-weight figure push you to the DELTA Pro 3; if it will live in one spot, weight shouldn't decide this at all.
If your plan needs 12V DC, a CPAP's DC cord or a 12V cooler, the Apex's real price includes that hub, and adding roughly $300B2 shrinks or erases its price advantage. At that point it's a bigger, longer-rated battery against one box with everything built in, which is a far closer call than the sticker suggests.
DELTA Pro 3: one 12V car socket, two 240V outletsApex 300 + B300K: no 12V car socket, one 240V outletone review notes the Apex 300 base carries six AC plugs and high-voltage connectors but no USB or DC portsB1, with DC and USB coming from a hub priced around $300B2
Why it mattersPrice the Apex with the hub if you need DC; if everything you run plugs into an AC outlet, ignore this and keep the savings.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The cheaper unit is also the bigger and longer-rated one, so cost per lifetime kilowatt-hour settles the battery question outright.
cost / lifetime kWh
$0.17 a lifetime kilowatt-hour for the DELTA Pro 3, $0.08 for the Apex bundle. Every input behind those figures leans the same way: the Apex costs less, stores more, and carries the higher cycle rating. It's rare for a value calculation to have nothing on the other side of the scale. This one doesn't.
In calendar terms, one cycle a day gives the Apex bundle 16.4 years of rated life to the DELTA Pro 3's 11, and neither battery quits at its count; it settles to about 80% of original capacity and keeps going. There's no reading of this section in which the pricier unit is the better buy for energy, so its case has to come from somewhere else on the page.
Your Life, Your Pick
Selected because: The blackout and van-life rows are where the Apex bundle's extra 1,218Wh of usable energy (4,700 minus 3,482) turns into hours.
The 8-hour blackout is the row that matters for most people buying at this size. Both finish it; the Apex bundle has 3,055Wh left over against the DELTA Pro 3's 1,837, which is nearly two more nights like it against just over one. On the third evening of a storm outage, one of these is running the fridge and the other is a very large paperweight.
Van Life Daily is the only row anyone fails. The DELTA Pro 3 comes up 1,203Wh short of the 4,685Wh day; the Apex bundle passes with 15Wh to spare, which is a pass the way catching a train as the doors close is a pass. CPAP goes to the DELTA Pro 3 on two small edges covered below, and camping and tailgating go to neither, because nobody is hauling 112.4 or 148.8 lbs to a campsite.
Portability & Form Factor
Selected because: The DELTA Pro 3 is one 112.4 lb chassis; the Apex bundle is 148.8 lbs in two pieces. Which is easier depends on whether you count pounds or lifts.
weight
The DELTA Pro 3 is 36.4 lbs lighter in total, but all 112.4 of them arrive as one lift, a job for two people. The Apex bundle comes apart: one reviewer puts the Apex 300 base alone at 38kgB14, with the B300K battery making up the rest, so its heaviest piece is still a smaller lift than the EcoFlow's single chassis.
So the EcoFlow wins on footprint, not on stairs. One chassis is one spot on the garage floor; two pieces are two spots to place and connect. If it's going to live in one place, and at these weights both of them should, the weight gap matters for about an afternoon.
Brand Trust
Selected because: Support is the one thing the DELTA Pro 3's premium clearly buys, so the two brands' service records matter more here than usual.
This is the one section where the DELTA Pro 3's premium buys something concrete. EcoFlow runs US phone, email and chat support; BLUETTI's is mostly email on China time, and our brand profile rates it the least consistent in the category. Neither track record is clean, so the choice is between two flavors of risk rather than a safe bet and a gamble.
With the Apex, buy direct from BLUETTI or register the unit: that's what gets the full 5-year term, which is shorter through resellers, and direct purchases tend to get the smoother support. Do that and most of this section's gap closes. On the EcoFlow side, there are no parts or service once the warranty ends, so its 5 years are the whole support horizon too.
Strengths & trade-offs
EcoFlow DELTA Pro 3
Strengths
- +Lighter by 35.3 lb
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 4,000 charge cycles vs the Apex 300 + B300K's 6,000, so it wears out sooner.
BLUETTI Apex 300 + B300K
Strengths
- +Costs $200 less
- +Larger battery capacity
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+35.3 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
Neither unit
Scoring these two at a campsite is a category error: neither travels — the DELTA Pro 3 is 113.5 lbs and the Apex 300 + B300K 148.8 lbs, and at those weights they roll off a truck bed if they go anywhere at all. The 2,100Wh here is trivial for either — it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
Apex 300 + B300K
Both survive the night. The Apex 300 + B300K finishes at 35% used with 3,055Wh left — 1.9 more nights like it. The DELTA Pro 3 finishes at 47% with 1,837Wh, 1.1 more nights like it. If your outages tend to run past one evening, that difference is the whole argument between them.
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
Either unit runs a CPAP all night on under a tenth of its capacity (9% and 7%), so the edge goes to the DELTA Pro 3 on two smaller things. It has a 12V car socket, which lets a CPAP's DC cord skip the inverter entirely; the Apex bundle's record shows none. And its maker publishes the lower noise rating, though the two makers rate noise on different terms, so treat that as a reason to look for hands-on reports, not as a difference you're guaranteed to hear.
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 workday takes 26% of the DELTA Pro 3 and 19% of the Apex bundle, so both finish with most of the battery untouched. A dead heat on the job itself. The tiebreak is the price tag, and the Apex is the cheaper of the two.
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
Neither unit
Scoring these two at a tailgate is a category error: neither travels — the DELTA Pro 3 is 113.5 lbs and the Apex 300 + B300K 148.8 lbs, and at those weights they roll off a truck bed if they go anywhere at all. The 670Wh here is trivial for either — it's the going that doesn't happen. If you need power away from the building, you're shopping the wrong class.
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
Apex 300 + B300K
The DELTA Pro 3 runs out with about a quarter of the day still to go, 1,203Wh short of the 4,685Wh it needs. The Apex bundle finishes, but with 15Wh left, which is a pass the way catching a train as the doors close is a pass. It wins this row; it doesn't win it comfortably, so living off it daily means planning a second battery.
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: Apex 300 + B300K runs 22.9h vs 17h.
$2,599 list · direct from BLUETTI
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 0–313.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–62.7hHigh-Draw Appliances
These reveal the real limitsscale 0–4.7h¹ 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 + B300K
Buy the Apex 300 + B300K. It's the cheaper of the two by $200, it holds 5,529.6Wh against the DELTA Pro 3's 4,096Wh, and it's rated for 6,000 cycles against 4,000, so you pay less for a bigger battery rated to deliver about twice the lifetime energy. It carries an 8-hour blackout with 1.9 more nights in reserve to the DELTA Pro 3's 1.1, and it's the only one of the two that finishes the modeled van-life day. The DELTA Pro 3's premium buys a single 112.4 lb chassis with a 12V car socket and two 240V outlets built in, plus EcoFlow's US phone support. Pay it only if one of those is a requirement rather than a preference.
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.
$2,599.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
or check the DELTA Pro 3 price$2,799.00 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 3 $2,399Apex 300 + B300K $2,364
The lowest we have recorded for each. A Black Friday price above it is a sale that unit has already had.
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): RV Living.
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 3 rates 3.9/5 (37th percentile of 20 Home Backup-class units), and Apex 300 + B300K rates 4.2/5 (53rd percentile of 20 Home Backup-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.
One Lift or Two
The DELTA Pro 3 is 36.4 lbs lighter overall, but its 112.4 lbs is one chassis and one lift, a job for two people. The Apex bundle's 148.8 lbs splits between the base station and the B300K battery, which move separately. Fewer total pounds or smaller pieces: neither of these is grab-and-go, so pick the problem you'd rather have.
Apex 300 + B300K: 45dB Published
45dB is about as loud as a running refrigerator. The DELTA Pro 3 is rated 30dB — lower, but published by a different maker measuring its own way, so the two figures are not a like-for-like gap. For most people, fan noise around 45dB and up is where sleep starts to suffer.
Apex 300 + B300K: Power Lifting to 7,680W
The Apex 300 + B300K 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 5,530Wh 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 3 publishes no equivalent.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. The Apex 300 + B300K'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 + B300K 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. One caution reading years across different sizes: a cycle is 5,530Wh on the Apex 300 + B300K and 4,096Wh on the DELTA Pro 3, so count lifetime energy — roughly 33,178 kWh against 16,384 kWh over the rated life. 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 Apex 300 + B300K.
Check Apex 300 + B300K price →or check the DELTA Pro 3 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 + B300K wins on both sticker price and long-term value. At $0.08/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
No parts or service once the warranty ends, so the 5-year term is the whole support horizon.
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
Buy direct from BLUETTI or register the unit: that's what gets the full 5-year term, and direct purchases tend to get the smoother support.
Analyst note
The DELTA Pro 3's premium buys a US phone line and the largest community in the category; the Apex's savings come with the least consistent support in it. Buying the Apex direct narrows that gap. The hardware gap runs the other way, and nothing on the brand side closes it.
Growth path
DELTA Pro 3
EXPANDABLESupports EcoFlow expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 4,096Wh.
Accepts up to 2,600W 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 + B300K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 5,530Wh.
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, so neither locks you out of growth — decide on capacity, price, and the rest, not the expansion checkbox.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA Pro 3
Field data on the DELTA Pro 3 is reviewer and retailer coverage rather than long-term owner historyA0. Reviewers call it a gold-standard whole-home backup unitA4, and the charging figures they repeat are 0-80% in about 50 minutes using up to 7,000W of combined input, with a full charge in roughly 90 minutes and up to 2,600W of solarA3. The cell rating cited is 4,000+ cycles to 80%, with an IP65 battery ratingA2.
That's first-look testing, not months in a basement, so there's no fan-noise or idle-drain record yet to confirm or contradict the early praiseA0A4.
“4,096Wh LFP battery with 4,000W continuous AC output (6,000W with X-Boost) and dual-voltage 120V/240V, expandable to 48kWh.”
Sources
ecoflow.com · amazon.com · homedepot.com · thepowerpick.com · outboundpower.com · techradar.com · thesolarlab.com
BLUETTI Apex 300 + B300K
The Apex 300 + B300K is new enough that its record is reviewer test units, not owner threads; our research found no long-term reports specific to this bundleB0. The testing that exists is under real household loads: one wash took the Apex from 100% to 65% in about an hourB9, a heat-pump dryer took it on down to 20% over 1½ hoursB10, and one reviewer called it among the few systems that could genuinely replace a generatorB4. Recharge drew praise too, ready again in under an hourB12.
The recurring complaint is the bare faceplate. One review notes the base has six AC plugs and high-voltage connectors and little elseB1, with DC and USB going through a hub it prices at about $300B2; another got a measly 8W phone charge from the B300KB6, and the app didn't show that battery's percentage while it didB7. Bulk comes up consistently as well: near 150 pounds stacked, movable by handles or a trolley but not casuallyB5, the base alone probably too heavy for most people to carry soloB14, and the trolley isn't in the bundleB3.
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
Sources
thesolarlab.com · techspective.net · digitalreviews.net · thesolarpit.com · cleantechnica.com · trustedreviews.com · bluettipower.com
Sources & Research Notes
Every owner claim in this report is traceable to a published source. The bracketed references above resolve here.
Recurring owner themes
- Huge 4,096Wh LFP capacity, 4,000W dual-voltage output, very fast charging, and big expandability are the standout praise; it's heavy at ~113 lbs. [DELTA Pro 3 · 2 entries]
- Reviewers consistently flag that the base Apex 300 has no USB/DC ports and requires a separate paid Hub D1 accessory, which some feel is overpriced for what it offers. [Apex 300 + B300K · 3 entries]
- Multiple sources note the extreme weight/bulk of the stacked Apex 300 + B300K system, making 'portable' a stretch despite handles/trolley options. [Apex 300 + B300K · 2 entries]
- Reviewers praise fast recharge and the system's ability to genuinely replace a generator for home backup and heavy loads like washers/dryers. [Apex 300 + B300K · 4 entries]
- A2
“LiFePO4 rated for 4,000+ cycles to 80% (10+ years), with an IP65 battery rating.”
homedepot.com / thepowerpick.com — DELTA Pro 3 review · 2026 · [positive]
- A3
“Multi-charge technology reaches 0-80% in about 50 minutes using up to 7,000W input, with a full charge in roughly 90 minutes; up to 2,600W solar.”
outboundpower.com / techradar.com — DELTA Pro 3 review · 2026 · [positive]
- A4
“Weighs about 113.5 lbs; reviewers call it a gold-standard whole-home backup unit for 2026.”
techradar.com / thesolarlab.com — DELTA Pro 3 review · 2026 · [positive]
- B1
“The Apex 300 doesn't have USB ports, DC ports, or much of anything beyond its six AC plugs and high-voltage connectors.”
thesolarlab.com — Bluetti Apex 300 Review: Cheap, Practical Home Backup? · unknown (2025/2026) · [mixed]
- B2
“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.com — Bluetti Apex 300 Review: Cheap, Practical Home Backup? · unknown (2025/2026) · [negative]
- B3
“The bundle runs nearly $2,700, which puts it solidly in "serious investment" territory—and that is not including the Hub D1 or foldable trolley if you want the full package.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09-21 · [mixed]
- B4
“It's one of the few systems I've tested that feels like it could genuinely replace a generator, without the noise, fumes, or maintenance.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09-21 · [positive]
- B5
“Stacked, you're near 150 pounds of lithium iron phosphate and inverter muscle—movable with the built-in handles or a trolley... but not something you'll casually lug to a picnic.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09-21 · [mixed]
- B6
“I just wonder why Bluetti did not include a USB-C port with some decent output, like 100 or 140W as I only got a measly 8W charge out of it for my phone.”
digitalreviews.net — Bluetti B300K Expansion Battery Review · 2025-12 · [negative]
- B7
“It did not even show the percentage on the app but only that there was a DC output flow and indeed my tablet was charging.”
digitalreviews.net — Bluetti B300K Expansion Battery Review · 2025-12 · [negative]
- B9
“Results: 1 wash took about 1 hour and drained the Apex from 100% down to 65%.”
digitalreviews.net — Bluetti Apex 300 Power Station Tests (Australia) Part II · 2025-09 · [positive]
- B10
“Just for fun we then turned on our heat pump dryer to see that over 1½ hours it would further drain it down to 20%.”
digitalreviews.net — Bluetti Apex 300 Power Station Tests (Australia) Part II · 2025-09 · [mixed]
- B12
“During my testing, the recharge speed was astonishing. In under an hour, I had a system ready to go again.”
thesolarpit.com — Bluetti Apex 300 Review · 2025-10-28 · [positive]
- B13
“For van lifers, the Apex 300 is a great base station, and the ability to add another 2.7kWh of capacity by simply purchasing another B300K expansion pack is a game-changer.”
cleantechnica.com — The Bluetti Apex 300 & B300K Portable Power Station Tested · 2025-08-05 · [positive]
- B14
“As will you: it weighs in at 38kg, and is probably much too big and heavy for most people to carry alone.”
trustedreviews.com — Bluetti Apex 300 Review · 2025-10-10 · [negative]
Research compiled October 11, 2026.
Who Should Buy Which
Buy the DELTA Pro 3 if you…
- →You run a CPAP from a 12V DC cord and want to plug it straight into the box: the DELTA Pro 3 has a car socket, and the Apex bundle's record shows none.
- →Your setup needs two 240V outlets on the unit itself, not one.
- →You've had a warranty claim go sideways before and want a US phone line to call, enough to pay $200 for it.
Buy the Apex 300 + B300K if you…
- →You're buying for storm outages that run past a night: it's most of the way through a third 8-hour night when the DELTA Pro 3 is already flat.
- →You want the cheaper box and the longer-rated battery in one purchase, and you'll buy direct from BLUETTI or register it to get the full warranty term.
- →You live in a van or RV and need the full modeled day covered, knowing it finishes with almost nothing left, so the real plan includes adding another B300K laterB13.
If neither fits
If your outages last a few hours and your biggest load is the fridge, both of these are a whole-home answer to a kitchen question. A single-box unit at half the DELTA Pro 3's capacity or less covers that for far less money and weight. And if you want power at a campsite, close this tab: neither of these is going anywhere near one.
The Bottom Line
Buy the Apex 300 + B300K. It costs $200 less, stores 35% more, and is rated to deliver about twice the lifetime energy, so the usual trade between price and battery simply isn't on offer in this matchup.
The DELTA Pro 3 is the right call for a narrower buyer: one who needs a 12V socket or a second 240V outlet on the box itself, or who'd pay for EcoFlow's phone line. Everyone else should take the bigger, cheaper battery, buy it direct, and keep the difference.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the Bluetti Apex 300 with B300K better than the EcoFlow DELTA Pro 3?
For home backup, yes. It's the cheaper of the two by $200, holds 5,529.6Wh against 4,096Wh, and is rated for 6,000 cycles against 4,000. The DELTA Pro 3 is the better pick only if you need its 12V car socket or its second 240V outlet built into the unit.
How many nights can each one run during a power outage?
On our modeled 8-hour blackout, the Apex bundle finishes the first night at 35% used with enough left for 1.9 more nights like it. The DELTA Pro 3 finishes at 47% used with 1.1 more nights in reserve. Recharging between nights stretches both further, but the Apex starts each day with the bigger cushion.
Can the DELTA Pro 3 power a van for a full day?
Not on our modeled van-life day: it has 3,482Wh usable against the 4,685Wh the day needs, leaving it 1,203Wh short. The Apex bundle covers the same day with 15Wh left, so it passes, barely. A full-time van build on either one should plan for an extra battery.
Which is better for running a CPAP overnight?
The DELTA Pro 3, narrowly. Both cover a CPAP night on 9% and 7% of their capacity, but the EcoFlow has a 12V car socket for a CPAP's DC cord and the Apex bundle's record shows none. EcoFlow also publishes the lower noise rating, though the two makers rate noise on different terms, so check hands-on reports before trusting either beside a bed.
How long will the batteries last?
The Apex bundle is rated for 6,000 cycles and the DELTA Pro 3 for 4,000, which at one cycle a day is 16.4 years against 11. Over those ratings the Apex delivers about 33,178 kWh to the DELTA Pro 3's 16,384, roughly twice the energy. Neither battery quits at its rated count; it drops to about 80% of original capacity.
Brand matchup
EcoFlow vs BLUETTI: measured across every matchup →Where to buy
EcoFlow DELTA Pro 3
$2,799.00
$2,799.00 · direct from EcoFlow
Last checked 28 days ago. Prices move — check before you buy.
BLUETTI Apex 300 + B300KPick
$2,599.00
$2,599.00 · direct from BLUETTI
Last checked 28 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.