Head-to-head test
EcoFlow DELTA Pro vs BLUETTI Apex 300
The DELTA Pro is $400 cheaper, 74 lbs lighter, and costs $0.11 per lifetime kWh against the Apex 300's $0.19 — the Apex 300 only closes that gap if you actually need its 45dB fan over the DELTA Pro's 60dB, or its 2,400W solar ceiling over 1,600W.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
EcoFlow
DELTA Pro
5,338Power Score · The AC & Fridge Zone
$1,599.00 list · direct from EcoFlow
BLUETTI
Apex 300
5,062Power Score · The AC & Fridge Zone
$1,699.00 list · direct from BLUETTI
Spec deltas
The EcoFlow DELTA Pro costs $1,399 and holds 3,600Wh. The BLUETTI Apex 300 costs $1,799 and holds 2,764.8Wh. That's the Apex 300 asking $400 more for less capacity, and it doesn't get the weight advantage back either — 99 lbs against 173 lbs.
Both are expandable, both carry a 5-year warranty, both are rated for 3,500 cycles, so this isn't a durability argument. It's a straightforward value one, and on price, capacity, and weight together, the DELTA Pro wins clean.
Where the Apex 300 earns its premium: a 2,400W solar ceiling against the DELTA Pro's 1,600W, and a fan that stays at 45dB where the DELTA Pro's known noise complaint runs a full 15dB louder. Neither is nothing, but neither closes a $400 gap by itself.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
Run it as cost per lifetime kWh and the gap widens rather than closes: $0.11 for the DELTA Pro against $0.19 for the Apex 300, so the DELTA Pro is cheaper on day one and cheaper across every kWh it ever delivers.
The DELTA Pro costs $1,399 with 3,600Wh capacityThe Apex 300 costs $1,799 with 2,764.8Wh capacity
Why it mattersA buyer optimizing purely for value per watt-hour should default to the DELTA Pro without needing another data point.
A reviewer who found the Apex 300 impossible to lift onto a table aloneB8 is describing a heavier unit than the one whose worst-case complaint is 'needs a cart on gravel.' The portability gap favors the DELTA Pro even accounting for both units' known weight friction.
The DELTA Pro weighs 99 lbs; the Apex 300 weighs 173 lbsOwners describe the DELTA Pro-line as wheeled and manageable on flat ground but needing a cart on uneven terrainA2
Why it mattersAnyone moving the station in and out of a vehicle regularly should weight the DELTA Pro's lighter build over the Apex 300's expansion port.
solar input
For an off-grid setup running near its ceiling for hours at a stretch — the exact case where solar speed matters — the Apex 300's quieter fan and higher solar ceiling work together, not separately, to make it the more livable choice despite the price and weight penalty.
The Apex 300 accepts up to 2,400W of solar input against the DELTA Pro's 1,600WThe Apex 300 runs at 45dB under load; DELTA Pro-line testing found a distracting high-pitched whine above 2,000W drawA4
Why it mattersOff-grid buyers who'll routinely run near full load should weigh the Apex 300's combined solar-and-noise advantage against its $400 premium; everyone else should bank the savings.
Add the $300 Hub D1 to get functional ports and the effective price gap over the DELTA Pro isn't $400 — it's closer to $700 before you've bought a single expansion battery for either unit.
Both units support expansion batteries and carry a 2,400W (Apex 300) versus 1,600W (DELTA Pro) solar ceilingThe Apex 300 requires a separate $300 Hub D1 accessory just to expose USB and DC ports on the front faceB7B11
Why it mattersBuyers comparing sticker prices should price in the Hub D1 before deciding the Apex 300's extra solar ceiling is worth the premium.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The clearest, largest gap on the page — $0.11 vs $0.19 per lifetime kWh.
cost / lifetime kWh
Four hundred dollars cheaper and holding more energy — the DELTA Pro's $1,399 for 3,600Wh against the Apex 300's $1,799 for 2,764.8Wh is already a lopsided trade before either unit runs a single cycle. Spread that over a full service life and the gap doesn't shrink, it grows: $0.11 per lifetime kWh for the DELTA Pro against $0.19 for the Apex 300.
That's not a rounding difference between two similarly-priced units. It's the DELTA Pro doing more total work for less money across every dollar you spend on it, full stop.
Portability & Form Factor
Selected because: 99 lbs vs 173 lbs is a real daily-use difference, even with the DELTA Pro's own weight caveat.
weight
Ninety-nine pounds against 173 — the DELTA Pro is the lighter unit by a wide margin, even though its own field reports flag it as heavy enough to need a cart on uneven groundA2. The Apex 300 starts from a heavier baseline and doesn't have wheels built in to compensate.
One Apex 300 reviewer couldn't lift it onto a table soloB8; DELTA Pro owners, by comparison, describe it as manageable on flat, smooth ground with its integrated wheels and telescoping handleA2. Neither is a light unit. One of them at least rolls.
Your Life, Your Pick
Selected because: DELTA Pro wins Weekend Camping and the 8-Hour Blackout with real margin.
The DELTA Pro wins Weekend Camping using 69% of its tank against the Apex 300's 89%, and the 8-Hour Blackout at 54% against 70%. Both units clear the bar, but the DELTA Pro does it with noticeably more capacity to spare.
CPAP Overnight, Remote Workday, and Tailgate Party all come back as ties, and Van Life Daily beats both — so the decision really does live in those two scenarios, and the DELTA Pro owns the margin in each.
What the Specs Don't Tell You
Selected because: Weight and noise both fire, and the Apex 300's Hub D1 add-on cost belongs in the honest-catch conversation.
Both units have a documented noise problem, just at different moments: the DELTA Pro-line gets a distracting whine above roughly 2,000W of drawA4, while the Apex 300 stays at a comparatively tame 45dB across its rated load. If you routinely push either unit hard, that's worth weighing over the raw price gap.
The honest catch on the Apex 300: its $1,799 price doesn't include working front-facing ports. The Hub D1 that adds them runs about $300 moreB7B11, which means the real gap to the DELTA Pro is closer to $700 once you configure the Apex 300 the way most buyers will actually want it.
Strengths & trade-offs
EcoFlow DELTA Pro
Strengths
- +Costs $100 less
- +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.
BLUETTI Apex 300
Strengths
- +Lighter by 15.2 lb
- +Higher AC output
- +Faster solar charging
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 at 69% of its tank against the Apex 300's 89%. Both cover the trip comfortably; the DELTA Pro just has more room to spare.
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
The DELTA Pro uses 54% of its capacity to cover an 8-hour outage against the Apex 300's 70%. The margin adds up if the outage runs longer than planned.
Battery budget usedlower = more headroom
LOAD Fridge 150W×8h · Router + Modem 20W×8h · LED Lights (4 bulbs) 40W×6h · Phone Charger 15W×3h
SCN-03 · 8 hours · needs 320Wh
CPAP Overnight
Sleep therapy without interruption — the #1 medical use case
Either unit
Both are wildly overqualified for CPAP. You're using 14% or less. Save your money and buy whichever is cheaper; the extra capacity is completely wasted on a 40W overnight load. Put the savings toward a second battery for multi-night trips.
Battery budget usedlower = more headroom
LOAD CPAP Machine 40W×8h
SCN-04 · 8 hours · needs 910Wh
Remote Workday
Full work day off-grid without power anxiety
Either unit
Both power your workstation all day without breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter and wastes less energy.
Battery budget usedlower = more headroom
LOAD Laptop 60W×8h · External Monitor 30W×8h · Router + Modem 20W×8h · Phone Charger 15W×2h
SCN-05 · 4 hours · needs 670Wh
Tailgate Party
Game day power for the crew
Either unit
Both handle game day easily. Since capacity isn't the deciding factor, consider weight: the lighter unit is easier to load into a truck bed. Also check if either has Bluetooth speaker-level noise. Fan sound matters in social settings.
Battery budget usedlower = more headroom
LOAD Blender 400W×0.5h · LED TV (55") 80W×4h · Bluetooth Speaker 15W×4h · Phone Charger (×3) 45W×2h
SCN-06 · 24 hours · needs 4,685Wh
Van Life Daily
A full day of mobile living — the ultimate endurance test
Neither unit
Neither unit can fully handle this scenario (needs 4,685Wh). You'd need a higher-capacity station or to cut back on usage.
Battery budget usedlower = more headroom
LOAD Mini-Fridge 150W×24h · Laptop 60W×4h · Phone Charger 15W×3h · LED Lights 40W×5h · Fan 75W×8h
The Load Test
RUNTIME = (Wh × 0.85) ÷ LOAD
None of the six scenarios above exactly yours? Build it. Toggle what you'd plug in; both units are tested against the combined draw.
Essentials
Comfort & Convenience
High-Draw Appliances
Test duration
8h
Continuous draw
205W
Projected runtime
For this load: DELTA Pro runs 14.9h vs 11.5h.
$1,599 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 0–204hComfort & 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
July 15, 2026
Verdict: the DELTA Pro
At $1,399 against $1,799, the DELTA Pro undercuts the Apex 300 by $400 while offering more capacity — 3,600Wh against 2,764.8Wh — and weighing 99 lbs against 173 lbs. It wins every scenario where the two diverge, from Weekend Camping to the 8-Hour Blackout, and its $0.11 cost per lifetime kWh beats the Apex 300's $0.19 outright. The Apex 300 answers back with a quieter fan under load, a higher solar ceiling, and BLUETTI's generally tighter app experience — real, but not enough to close a $400 gap on a unit that's already winning the capacity and weight numbers too.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open EcoFlow's and BLUETTI's current prices.
$1,599.00 list · direct from EcoFlow
or check the Apex 300 price$1,699.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 15, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
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 3.9/5 (33rd percentile of 16 Home Backup-class units), and Apex 300 rates 4.9/5 (92nd percentile of 25 Large-class units).
How the class ranking is computed →Test Notes & Caveats
Hidden gotchas and advantages we spotted that you won't find on the product page.
99 lbs vs 173 lbs, With a Caveat on Both
The DELTA Pro is the lighter unit by a wide margin, though its own field reports note it needs a cart on uneven ground. The Apex 300 starts from a heavier baseline with no wheels of its own.
Two Different Noise Problems
The DELTA Pro-line's noise complaint shows up above roughly 2,000W of draw. The Apex 300 stays quieter at 45dB across its rated load — the tradeoff runs the other direction from what the weight numbers suggest.
10ms vs 20ms Switchover
The Apex 300's 10ms UPS switchover is twice as fast as the DELTA Pro's 20ms. For most electronics the difference is invisible; for equipment sensitive to even a brief power gap, it isn't.
Full record above — the Test Desk pick is the DELTA Pro.
Check DELTA Pro 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 Pro wins on both sticker price and long-term value. At $0.13/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Brand trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. Supports up to 180kWh modular expansion with DELTA Pro Ultra X.
Worth knowing
The Oct 2025 DELTA Max 2000 recall (overheating/fire risk, 6 incidents) is worth noting. Also tested subscription paywalls for advanced app features in early 2025 before community backlash paused the plan. No parts or service offered out of warranty.
BLUETTI
Ecosystem
One of the broadest lineups — 15-20+ models from budget (AC2A) to flagship (Apex 300, 3072Wh). Includes specialized products: vehicle solar hubs, sodium-ion cold-weather units, and balcony storage systems.
Support
The most inconsistent support in the space. Heavily email-based with China timezone delays. Some users get smooth, efficient service; others report weeks of troubleshooting runarounds, being offered discounts on new units instead of repairs, and confusing third-party purchase claim processes. Buying direct from Bluetti's website tends to produce better support outcomes.
Community
Active and growing — Reddit r/bluetti has a dedicated community. Second-largest after EcoFlow in engagement.
App experience
Rated 4.5/5 iOS and Android — tied for best app experience in the category. V3.0 UI redesign was well-received.
Unique strength
Among the best capacity-to-price ratios available — several Elite and Apex units are the lowest $/Wh in the catalog. Widest product diversity including industry-firsts like sodium-ion cold-weather units and dual solar+alternator vehicle hubs. Full LFP standardization across lineup (3,500-6,000+ cycles). Dual-voltage (120V/240V) in flagships.
Worth knowing
Customer support inconsistency is the #1 risk factor. Older/discontinued units may become unrepairable — no spare parts policy for some models. Some reports of erratic communication from support agents.
Analyst note
EcoFlow positions itself as a mid-to-premium brand with stronger support infrastructure, while BLUETTI competes on value. The question is whether the EcoFlow ecosystem and support premium is worth it for your use case.
Growth path
DELTA 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.
Generous port selection supports complex multi-device setups.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the Apex 300's higher solar ceiling (2,400W vs 1,600W) gives it the stronger off-grid growth path — more panels can feed a bigger bank as it grows.
What Owners Report
Patterns from published owner reports and long-term reviews — every claim cited to its source below.
EcoFlow DELTA Pro
The DELTA Pro has a long track record as a home-backup workhorse: reviewers describe it running fridges, lighting, and a space heater through multiple overnight outages over months, backed by an LFP battery rated for a decade-plus of daily useA1A3. That's a different kind of evidence than a fresh-out-of-the-box unboxing review, and it's consistently positive.
The one recurring complaint is noise under heavy load — a high-pitched whine above roughly 2,000W that's distracting in a quiet room, though it's quiet enough at lighter drawsA4. Coverage worth flagging: much of the available field data blends the original DELTA Pro with the newer, heavier DELTA Pro 3, so treat specific weight and dB figures for this exact model with some caution.
“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
The Apex 300's real cost of ownership shows up in accessories, not the sticker price. Multiple reviewers flag the $300 Hub D1 needed just to get working USB and DC ports on the front faceB7B11, and a further $699 Hub A1 if you want to link multiple units in parallelB12 — costs that never show up in the $1,799 headline figure.
On the hardware itself, opinion splits by degree rather than direction: one reviewer called the fans relatively tame for the unit's sizeB5, while another couldn't lift it onto a table aloneB8. A separate, more consistent thread describes firmware updates causing mode-lock issues, charging errors, and Bluetooth disconnectsB1B2B3 — worth watching for at update time, not treating as a hardware flaw.
“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]
- B5
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [positive]
- B7
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
Techspective — 'Bluetti Apex 300 with B300K Review' · 2025-09 · [negative]
- B8
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table.”
T3 — 'Bluetti Apex 300 review: transform your off-grid life' · 2025-11 · [negative]
- 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 July 15, 2026.
Who Should Buy Which
Buy the DELTA Pro if you…
- →Buyers optimizing purely for cost per kWh and total capacity per dollar
- →Home-backup shoppers who want a proven, long-track-record platform over a newer design
- →Anyone moving the unit regularly who wants the lighter build, even with its own cart caveat on rough ground
Buy the Apex 300 if you…
- →Off-grid buyers running near full load for hours who need the quieter 45dB fan and higher 2,400W solar ceiling
- →Buyers who've already budgeted for the Hub D1 and want BLUETTI's modular port system
- →Anyone prioritizing surge headroom for hard-starting compressor loads over raw price
If neither fits
Van Life Daily's roughly 4,685Wh need beats both units outright — the DELTA Pro covers about 153% of its own tank against that load and the Apex 300 about 199%, so anyone living off one of these full-time needs a larger home-backup-class system instead.
The Bottom Line
Take the DELTA Pro unless you have a specific reason not to: it's $400 cheaper, holds more energy, weighs 74 lbs less, and costs $0.11 per lifetime kWh against the Apex 300's $0.19 — and it wins both scenarios that actually separate the two.
The Apex 300 earns its premium only for off-grid buyers running near full load who value the quieter fan and the higher solar ceiling enough to also absorb the Hub D1's real add-on cost. Everyone else should bank the $400.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EcoFlow DELTA Pro or BLUETTI Apex 300 the better value?
The DELTA Pro, clearly — it costs $400 less, holds more capacity at 3,600Wh against 2,764.8Wh, and comes out to $0.11 per lifetime kWh against the Apex 300's $0.19. The Apex 300 only closes the value gap if you factor in its quieter fan or higher solar ceiling as worth the premium to you specifically.
Which one is quieter under heavy load?
The Apex 300, at a rated 45dB against the DELTA Pro-line's reported high-pitched whine above roughly 2,000W of draw. If the unit will sit in a bedroom or a quiet room while running hard, that gap matters more than the price difference.
Do I need to budget for extra accessories with either unit?
Mainly with the Apex 300. Its front face doesn't include working USB and DC ports out of the box — those require the separate Hub D1, priced around $300 — while the DELTA Pro's ports are built in at the $1,399 price. Factor that in before comparing the two sticker prices directly.
Which one charges faster from solar?
The Apex 300, with a 2,400W solar ceiling against the DELTA Pro's 1,600W. That advantage matters most for off-grid buyers who regularly run the unit down and need to refill it from panels rather than a wall outlet.
Where to buy
EcoFlow DELTA ProPick
$1,599.00
$1,599.00 list · direct from EcoFlow
BLUETTI Apex 300
$1,699.00
$1,699.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.