Head-to-head test
EcoFlow DELTA Pro vs BLUETTI Apex 300 + B300K
The Apex 300 + B300K runs 15dB quieter under load and holds roughly one and a half times the capacity, yet refills from solar in about the same window as the DELTA Pro — which only wins on price if your daily draw stays under its 3,600Wh tank, because past that number, like Van Life Daily's 4,685Wh, it cannot finish the job at all.
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 + B300K
6,552Power Score · The AC & Fridge Zone
$2,599.00 list · direct from BLUETTI
Spec deltas
The BLUETTI Apex 300 + B300K costs $2,599 against the EcoFlow DELTA Pro's $1,399, and the extra money buys real headroom: 5,529.6Wh against 3,600Wh, a fan rated at 45 decibels under load against 60, and a 10-millisecond UPS switchover against 20.
The DELTA Pro has earned its reputation as a home-backup workhorse, built for high-draw appliances and running essentials through extended outages with LFP cells rated for 10-plus years of daily useA3. The catch owners keep flagging is fan noise: push it past 2,000W and the fans produce a noticeable high-pitched whine that's distracting in a quiet roomA4.
Run the lifetime math and the DELTA Pro is cheaper to own — $0.11 per kWh delivered against $0.13 for the Apex. That edge is real for anyone whose needs stay inside the DELTA Pro's 3,600Wh tank. It stops being an edge the moment the job is bigger than the battery.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
For overnight home backup, the unit is often on and drawing power in the same room someone is trying to sleep in, which makes the fan spec a comfort spec, not a footnote.
The Apex 300 + B300K is rated at 45dB under load; the DELTA Pro is rated at 60dBOwners describe the DELTA Pro's fans producing a noticeable high-pitched whine under draws above 2,000WA4
Why it mattersAnyone backing up a bedroom, nursery, or home office overnight should weight the Apex's quieter rating over the DELTA Pro's lower price.
solar input
The Apex's larger solar ceiling scales with its larger tank, so the extra capacity doesn't cost extra recharge time.
The DELTA Pro holds 3,600Wh and accepts up to 1,600W of solarThe Apex 300 + B300K holds 5,529.6Wh and accepts up to 2,400W of solar
Why it mattersBuyers leaning on panels during a multi-day outage get more stored energy from the Apex without a longer refill, which flips the usual assumption that a bigger battery means a slower recharge.
Capacity
Cost-per-kWh math ($0.11 for the DELTA Pro against $0.13 for the Apex) only matters if the unit can actually complete the job; a cheaper unit that can't finish the day isn't cheaper, it's incomplete.
Van Life Daily needs 4,685Wh; the DELTA Pro's 3,600Wh capacity covers only 69% of that on its own and needs 153% of its own tank to finish the dayThe Apex 300 + B300K's 5,529.6Wh capacity covers exactly 100% of that same day
Why it mattersAnyone whose daily draw approaches or exceeds roughly 4,000Wh should skip the DELTA Pro's cost edge and go straight to the Apex.
weight
At nearly 50 lbs heavier, the Apex is the one you set down once and never move again; the DELTA Pro's wheels at least make relocating it around a house or garage realistic.
The DELTA Pro weighs 99 lbs and ships with wheels, though owners note a cart is still needed on uneven groundA2The Apex 300 + B300K weighs 148.8 lbs stacked, and reviewers note it's 'not something you'll casually lug to a picnic'B5
Why it mattersBuyers who need the unit to move between rooms, vehicles, or job sites regularly should weight the DELTA Pro's 50-lb-lighter frame over the Apex's larger tank.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: DELTA Pro is cheaper to own per kWh and per warranty year, the strongest card in its favor.
cost / lifetime kWh
The DELTA Pro delivers energy for $0.11 per lifetime kWh against $0.13 for the Apex, and costs $280 per warranty year against $520 — a real, straightforward price edge for anyone whose needs fit inside its tank.
That edge disappears the moment the job doesn't fit. The DELTA Pro can't complete Van Life Daily's 4,685Wh requirement on a single charge; the Apex can, at exactly 100% of capacity. Cheaper per kWh only matters for the kWh you can actually deliver.
Your Life, Your Pick
Selected because: Apex wins four of six scenarios outright and is the only one that completes Van Life Daily.
The Apex wins Weekend Camping, 8-Hour Blackout, Remote Workday, and Van Life Daily outright, and the two units tie on CPAP Overnight and Tailgate Party — where both have enough headroom that the extra capacity goes unused.
Van Life Daily is the one that separates them for good: the DELTA Pro needs 153% of its own tank to cover a single day's draw, meaning it simply cannot, while the Apex finishes it with nothing left over.
What the Specs Don't Tell You
Selected because: Four cards fire — weight, noise, UPS speed, and warranty value — and noise/UPS both favor the Apex clearly.
Weight and noise both fire as warnings, and they point in opposite directions: the DELTA Pro is the lighter unit at 99 lbs against 148.8 lbs, but the Apex is the quieter one at 45dB against 60dB. The UPS card favors the Apex outright — its 10ms line-interactive switchover beats the DELTA Pro's 20ms standby figure, which matters for anything that can't tolerate a slow transfer.
The warranty card is informational rather than a winner: both carry 5-year coverage, but the DELTA Pro costs less per warranty year ($280 against $520) simply because it costs less to buy in the first place.
Brand Trust
Selected because: Cross-brand pair with genuinely different support models and ecosystems worth surfacing.
EcoFlow runs the largest ecosystem in the category and the largest owner community, with US-based phone support and generally fast prepaid-label replacements, though experiences are polarized and buying through Costco or Amazon reportedly produces a stronger return safety net.
BLUETTI leads on capacity-to-price value and ties for the best-rated app in the category, but support is the honest risk: heavily email-based with China-timezone delays, and outcomes range from smooth to weeks-long runarounds. Buying direct from BLUETTI's own site reportedly produces better results than third-party retailers.
Strengths & trade-offs
EcoFlow DELTA Pro
Strengths
- +Costs $1,000 less
- +Lighter by 49.8 lb
Trade-offs
- –Very heavy unit that may be difficult for one person to lift.
- –Can receive complaints about fan noise under heavy load.
BLUETTI Apex 300 + B300K
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
Trade-offs
- –Substantially more expensive (+$1,000) than the DELTA Pro.
- –Significantly heavier (+49.8 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
Apex 300 + B300K
The DELTA Pro cuts it close at 69%. One cold night or an unexpected device and you're rationing power. The Apex 300 + B300K finishes at 45%, leaving real headroom for spontaneous use. If you camp in variable weather, that buffer keeps you relaxed instead of checking your battery app every 20 minutes.
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, but the Apex 300 + B300K finishes at just 35% used. That's enough reserve for a second blackout night. The DELTA Pro at 54% leaves little margin if the outage runs longer than expected. In storm-prone areas, that remaining capacity is insurance.
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 10% 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
Apex 300 + B300K
The Apex 300 + B300K gives you a comfortable buffer at 19%. Enough to work late, join extra video calls, or charge a second device without worry. The DELTA Pro at 30% works but leaves less room for the unexpected. For daily remote work, that peace of mind matters.
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
Apex 300 + B300K
This is the scenario that separates them for good. The DELTA Pro needs 153% of its own tank to cover a full van-life day, meaning it can't finish without a mid-day recharge. The Apex 300 + B300K covers the identical day at exactly 100% — no margin to spare, but it gets there.
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: Apex 300 + B300K runs 22.9h vs 14.9h.
$2,599 list · direct from BLUETTI
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
July 15, 2026
Verdict: the Apex 300 + B300K, on Power Score margin
The DELTA Pro is $1,200 cheaper and cheaper to own — $0.11 per lifetime kWh against $0.13, and $280 per warranty year against $520. That math holds right up until the job exceeds 3,600Wh, at which point the DELTA Pro cannot complete it: Van Life Daily needs 4,685Wh, and the DELTA Pro covers only 100% of that at 3,600Wh (it needs 153% of its own tank to finish). The Apex 300 + B300K covers that same day at exactly 100% of its 5,529.6Wh capacity, runs 15dB quieter under load (45dB against 60dB, and owners confirm the DELTA Pro's fans produce a noticeable whine under heavy drawA4), and switches over in 10ms against 20ms. Buyers whose daily draw realistically stays under roughly 3,600Wh should take the DELTA Pro's lower price and better cost-per-kWh seriously. Anyone backing up a full day's load, or anywhere noise matters overnight, should pay the premium.
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.
$2,599.00 list · direct from BLUETTI
or check the DELTA Pro price$1,599.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 15, 2026
Measured Data
Benchmark scores and the full spec record, side by side.
Benchmark scores
Not rated for both units (minimum threshold unmet): UPS, 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 rates 3.9/5 (33rd percentile of 16 Home Backup-class units), and Apex 300 + B300K rates 4.4/5 (67th percentile of 16 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.
99 Pounds Against 148.8
Both units need wheels or a cart in practice, but the Apex is nearly 50 lbs heavier stacked. The DELTA Pro's lighter frame matters more if this needs to move between rooms or vehicles regularly rather than sit in one spot.
45 Decibels Against 60
That 15-decibel gap is close to the difference between a running refrigerator and a loud window air conditioner. It matters most for overnight backup near living space, less for a garage or basement install.
10ms Line-Interactive Against 20ms Standby
The Apex switches over roughly twice as fast. For anything that can't tolerate a slow transfer, that gap is the whole reason to pick it over the DELTA Pro.
Same Five Years, Different Price Tags
Both carry 5-year coverage. The DELTA Pro costs less per warranty year simply because it costs less to buy — $280 against $520 — not because either warranty is stronger.
Full record above — the Test Desk pick is the Apex 300 + B300K.
Check Apex 300 + B300K 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
Both units have similar long-term ownership costs ($0.13/kWh vs $0.13/kWh). The price difference is what you see on the sticker — neither is a hidden bargain or rip-off.
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
The deepest product ecosystem and fastest-charging technology in the category, backed by the largest owner community for troubleshooting and comparison.
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
The strongest capacity-to-price ratio in the market, with an app that ties for the best-rated experience across the category.
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's edge is scale and support infrastructure; BLUETTI's edge is that the same dollar buys more documented capacity. Support consistency is the real research item for either brand before buying.
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 + 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.
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 + B300K'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 is long regarded as a gold standard for home backup, built for high-draw appliances and full-scale battery expansion, and owners report running a fridge, lighting, and a space heater through outages simultaneouslyA1. It's held up across multi-month use as primary backup power, with the LFP chemistry rated for thousands of cycles and 10-plus years of daily useA3.
The consistent knock is fan noise: past roughly 2,000W of draw, the fans produce a noticeable high-pitched whine that's distracting in a quiet room, though it's quiet enough at lighter loadsA4. It's heavy but wheeled — the integrated wheels and telescoping handle help on flat ground, though owners note a cart is needed for uneven terrainA2. Worth flagging honestly: available field coverage for this original DELTA Pro is thinner than for the newer, heavier DELTA Pro 3, so general reliability and noise patterns carry across the line, but our listed specs (3,600Wh, 99 lbs, 60dB) are this unit's own.
“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 + B300K
Reviewers who've tested the Apex 300 + B300K describe it as one of the few systems that genuinely feels like it could replace a generator, without the noise, fumes, or maintenanceB4, and recharge speed is repeatedly called out as fast — one tester had a full system ready again in under an hourB12.
The honest catch: this is a very new bundle, so the available evidence leans heavily on professional reviewer test units rather than long-term owner threads, and should be read that way. What reviewers agree on is that the base Apex 300 ships with no USB or DC ports at all beyond its AC plugs and high-voltage connectors, and adding them means a separate roughly $300 Hub D1 accessory some call steep for what it deliversB1B2.
“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
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]
- 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]
- 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
“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]
- 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]
- 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]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the DELTA Pro if you…
- →You want a proven home-backup platform under $1,500 that already runs LFP cells rated for over a decade of daily useA3.
- →Your realistic daily or outage draw stays under roughly 3,600Wh and you'd rather bank the extra $1,200.
Buy the Apex 300 + B300K if you…
- →You're backing up a bedroom, office, or anywhere noise matters overnight — 45dB is a genuine 15dB quieter than the DELTA Pro's 60dB rating.
- →Your daily draw regularly approaches or exceeds about 4,000Wh, like a full van-life day, where the DELTA Pro physically runs out mid-task.
If neither fits
If the real job is a tailgate party or a day trip needing under 700Wh, both of these are serious overkill for the price — a sub-$500 unit from either brand's smaller lineup covers it for a fraction of the cost.
The Bottom Line
The DELTA Pro is the better buy for anyone whose daily draw realistically stays under its 3,600Wh tank — it's $1,200 cheaper and cheaper per kWh delivered. Past that line, the math stops mattering, because the DELTA Pro simply can't finish the job: a full van-life day needs 153% of its own capacity, where the Apex covers the same day at exactly 100%.
Add in a fan rated 15dB quieter and a twice-as-fast UPS switchover, and the Apex 300 + B300K is the pick for anyone backing up a real daily load or anywhere noise matters overnight. The DELTA Pro is the pick for everyone whose needs actually fit inside its tank.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
EcoFlow DELTA Pro or BLUETTI Apex 300 + B300K — which should I buy?
It comes down to how much daily energy you actually need. The DELTA Pro is $1,200 cheaper and cheaper per kWh delivered, but it physically cannot complete a 4,685Wh day like full-time van life — the Apex can, at exactly 100% of its tank. Under roughly 3,600Wh a day, take the DELTA Pro's price.
Which one is quieter running through the night?
The Apex 300 + B300K, rated at 45dB against the DELTA Pro's 60dB under load. Owners of the DELTA Pro line confirm the fans produce a noticeable high-pitched whine once draw climbs past about 2,000W, which matters if it's running near where someone sleeps.
Can either power station run a full day of van life off one charge?
Only the Apex 300 + B300K. A full van-life day needs about 4,685Wh; the Apex's 5,529.6Wh capacity covers that at exactly 100%, while the DELTA Pro's 3,600Wh tank would need 153% of its own capacity to finish, meaning a mid-day recharge is required.
Does the Apex 300 + B300K come with USB and DC ports out of the box?
No. Reviewers consistently note the base unit ships with just six AC plugs and high-voltage connectors, and adding USB or DC output means buying a separate Hub D1 accessory for roughly $300.
Which is cheaper to own over its lifetime?
The DELTA Pro, at $0.11 per lifetime kWh against $0.13 for the Apex, and $280 per warranty year against $520. That edge only holds for buyers whose daily needs fit inside its 3,600Wh tank.
Where to buy
EcoFlow DELTA Pro
$1,599.00
$1,599.00 list · direct from EcoFlow
BLUETTI Apex 300 + B300KPick
$2,599.00
$2,599.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.