EcoFlow DELTA 3 Plus vs BLUETTI Apex 300 + 2*B500K
The EcoFlow DELTA 3 Plus (1,024Wh) and BLUETTI Apex 300 + 2*B500K (13,005Wh) sit in different weight classes. The real question: do your power needs justify the larger unit, or would you be overpaying for capacity that sits unused? The Apex 300 + 2*B500K has a slight edge, but the margin is close enough that your use case should break the tie.
What the spec gap means in practice: the Apex 300 + 2*B500K's 3,840W inverter can run a window AC unit, a full-size fridge, or power tools. The DELTA 3 Plus's 1,800W inverter will flat-out refuse to start those appliances. On stamina, the Apex 300 + 2*B500K keeps a fridge alive for roughly 74 hours vs the DELTA 3 Plus's 6 hours. The cost? Portability. At 282.2 lbs, the Apex 300 + 2*B500K is a two-person lift you set down once and leave. The DELTA 3 Plus at 27 lbs is something one person can actually carry.
Pick the Apex 300 + 2*B500K if your primary use is weekend camping or 8-hour blackout. Go with the DELTA 3 Plus if you need the heavier-duty specs for demanding loads. Most buyers overlook this: the Apex 300 + 2*B500K costs ~$0.13/kWh over its full lifespan, which adds up significantly over years of regular use. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
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The Breakdown
What each unit does well, where it falls short, and the trade-offs that matter.
DELTA 3 Plus Analysis
The 1,800W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W.
Strengths
- Save $4,991 vs Competitor
- 255.2 lbs Lighter
Trade-offs & Considerations
- Weaker inverter (-2,040W) limits appliance compatibility.
Apex 300 + 2*B500K Analysis
With a massive 3,840W output (and 7,680W surge), the Apex 300 + 2*B500K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 282.2 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion. A standout feature is the value proposition: at roughly $0.44 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- Larger Battery Capacity
- Higher AC Output Power
- Faster Solar Charging
Trade-offs & Considerations
- Substantially more expensive (+$4,991) than the DELTA 3 Plus.
- Significantly heavier (+255.2 lbs), making it harder to move.
- Very heavy unit that may be difficult for one person to lift.
What the Specs Don't Tell You
Hidden gotchas and advantages we spotted that you won't find on the product page.
Apex 300 + 2*B500K: 282.2 lbs Is a Commitment
Watch outAt 282.2 lbs, this is a two-person lift. Plan your placement carefully. Once it's set up, you won't want to move it. It's a semi-permanent appliance. Pick your spot.
Apex 300 + 2*B500K: 45dB Under Load
Note45dB is about as loud as a running refrigerator. If you're running a CPAP or sleeping near this unit, the fan noise may be noticeable. Most people find anything above 45dB disruptive for sleep.
Warranty Value Comparison
NoteThe DELTA 3 Plus gives you 7.2 years of warranty per $1,000 spent, vs the Apex 300 + 2*B500K's 0.9 years. That's 8.1× more coverage per dollar. An underrated factor if you're keeping this unit for years.
Your Life, Your Pick
We ran the math on six real-world scenarios. Here's which unit survives your actual life.
Weekend Camping
2 nights
Two nights off-grid with essential comfort
The DELTA 3 Plus runs out of juice. It only has 870Wh usable, but this scenario needs 2,100Wh. The Apex 300 + 2*B500K covers it and still has 597h of phone charging left over.
8-Hour Blackout
8 hours
Keep the essentials running through a night without power
The DELTA 3 Plus runs out of juice. It only has 870Wh usable, but this scenario needs 1,645Wh. The Apex 300 + 2*B500K covers it and still has 627h of phone charging left over.
CPAP Overnight
8 hours
Sleep therapy without interruption — the #1 medical use case
Both are massively overpowered for CPAP. You're using 37% or less. Save $4,991 and buy the cheaper unit; the extra capacity is wasted on a 40W medical device. Instead, invest in a second battery for multi-night camping trips.
Remote Workday
8 hours
Full work day off-grid without power anxiety
The DELTA 3 Plus runs out of juice. It only has 870Wh usable, but this scenario needs 910Wh. The Apex 300 + 2*B500K covers it and still has 676h of phone charging left over.
Tailgate Party
4 hours
Game day power for the crew
Both handle it, but neither is stressed. Tailgating is a light load. The Apex 300 + 2*B500K's extra margin is nice but not decisive here. Consider weight instead: you're carrying this to a parking lot, and 255 lbs makes a real difference when loading up.
Van Life Daily
24 hours
A full day of mobile living — the ultimate endurance test
The DELTA 3 Plus runs out of juice. It only has 870Wh usable, but this scenario needs 4,685Wh. The Apex 300 + 2*B500K covers it and still has 425h of phone charging left over.
Will It Power Your Gear?
Real-world runtime estimates for common appliances. Based on 85% inverter efficiency — actual results vary with temperature and load cycling.
Essentials
The basics you need running| Appliance | DELTA 3 Plus | Apex 300 + 2*B500K |
|---|---|---|
😴 CPAP Machine 40W draw | 21.8h2 full nights | ★276.4h34 full nights |
📱 Phone Charger 15W draw | 58h | ★736.9h |
📡 Router + Modem 20W draw | 43.5h | ★552.7h |
💡 LED Lights (4 bulbs) 40W draw | 21.8h | ★276.4h |
💻 Laptop (Working) 60W draw | 14.5h | ★184.2h |
Comfort & Convenience
Makes off-grid life actually enjoyable| Appliance | DELTA 3 Plus | Apex 300 + 2*B500K |
|---|---|---|
🌀 Box Fan 75W draw | 11.6h | ★147.4h |
📺 LED TV (55") 80W draw | 10.9h | ★138.2h |
🧊 Mini-Fridge 150W draw | 5.8h | ★73.7h |
🛏️ Electric Blanket 200W draw | 4.4h0 full nights | ★55.3h6 full nights |
High-Draw Appliances
These reveal the real limits| Appliance | DELTA 3 Plus | Apex 300 + 2*B500K |
|---|---|---|
☕ Coffee Maker 1000W draw | 0.9h | ★11.1h |
🍽️ Microwave 1200W draw | 0.7h | ★9.2h |
🔥 Space Heater 1500W draw | 0.6h | ★7.4h |
Runtime = (capacity × 0.85) ÷ appliance watts. Actual runtime varies with battery age, temperature, and simultaneous loads.
Expert Verdict
Apex 300 + 2*B500K Edges Ahead on Power Score
These two units are closely matched on individual specs, but our Power Score analysis gives the Apex 300 + 2*B500K the edge with a composite score of 10,032 vs 3,216.
Based on 18+ spec comparisons and real-world performance data
Power Score Breakdown
How each unit performs across our segmented benchmarks
| Benchmark | DELTA 3 Plus | Apex 300 + 2*B500K |
|---|---|---|
| Overall Power Score | 3,216Appliance Class | ★10,032Whole-Home Capable |
| UPSResponse & Reliability | 3,427 | ★6,892 |
| RV LivingEnergy Density & Output | 3,135 | ★9,997 |
| Home BackupCapacity & Resilience | 3,278 | ★10,364 |
| CPAPSleep Therapy Reliability | 3,323 | ★6,203 |
| Solar GeneratorSolar Input & Efficiency | 3,161 | ★8,540 |
| TailgatingOutlets & Portability | 3,066 | — |
| Food TruckSustained Heavy Output | 3,079 | ★8,964 |
| Apartment BalconyCompact Solar Living | 3,188 | — |
| CampingLightweight & Versatile | 3,010 | — |
Power Score is our proprietary benchmark calculated from 14 spec dimensions. Higher = better. "—" means the product doesn't meet the minimum threshold for that bench.
Full Specification Breakdown
| Feature | DELTA 3 Plus | Apex 300 + 2*B500K |
|---|---|---|
| Price | ★$699.00 | $5,690.00 |
| Capacity (Wh) | 1024 | ★13004.8 |
| Output (W) | 1800 | ★3840 |
| Surge Peak | 3600W | ★7680W |
| AC Outlets | 6 | 6 |
| USB-C Charging Outputs | 100W | 100W |
| Solar Input (W) | 1000 | ★2400 |
| Weight (lbs) | ★27 | 282.2 |
| UPS | Yes (10ms) | Yes (<10ms) |
| Charging Cycles | ★4000 | 3500+ |
| Warranty (Years) | 5 | 5 |
| Battery Expansion Feasibility | Yes | Yes |
| App Control | Yes | Yes |
| $/Watt Hour | $.68 | ★$.44 |
| Noise Level (db) | ★30 | 45 |
| Solar Input Type | ★XT60 | MC4 |
| USB-A Ports | 2 | 2 |
| USB-C Ports | 2 | 2 |
| Cost per Wh (calculated) | $0.68/Wh | ★$0.44/Wh |
Beyond the Specs: Owning It
What happens after you click “Buy” — reliability, brand trust, growth potential, and true cost of ownership.
Lifetime Value
DELTA 3 Plus
Battery lifespan: 11yr daily · 38.5yr weekends · 76.9yr weekly
Apex 300 + 2*B500K
Battery lifespan: 9.6yr daily · 33.7yr weekends · 67.3yr weekly
The DELTA 3 Plus is cheaper to buy, but the Apex 300 + 2*B500K is cheaper to own. At $0.13/kWh over its lifetime vs $0.17/kWh, the Apex 300 + 2*B500K's higher cycle life and capacity make each dollar go further over the years.
Brand Trust
EcoFlow
Ecosystem
Largest in portable power — 12-15 models across DELTA Pro, DELTA 3, and RIVER 3 series, plus solar panels and smart home panels
Support
US-based phone/email/chat support (1-800-368-8604). Experiences are polarized — many report hassle-free prepaid-label replacements, but others report long waits and refurbished units sent for new claims. Pro tip: buying from Costco or Amazon gives you a stronger return safety net.
Community
Largest community in the space — Reddit r/Ecoflow_community (~31K members), multiple Facebook groups, and an official community forum
App Experience
Rated 4.6/5 iOS (~8,400 ratings) · 4.2/5 Android (~17,000 ratings)
Unique Strength
Fastest-charging technology (X-Stream), deepest product ecosystem, and most active innovation cadence. 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
Varies — check manufacturer website for full product lineup
Support
Limited data available — check recent reviews and community forums
Community
Smaller community — fewer independent reviews and user reports
App Experience
Rated Not rated
Unique Strength
Check manufacturer website for differentiators
Worth Knowing
Less established brand — fewer long-term reliability reports available
EcoFlow and BLUETTI are close competitors. Both have established support channels and growing ecosystems. Compare their specific warranty terms and community size for your peace of mind.
Growth Path
DELTA 3 Plus
✓ ExpandableSupports expansion batteries from EcoFlow. You can increase capacity without replacing the base unit. A significant long-term advantage.
Accepts up to 1,000W 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 + 2*B500K
✓ ExpandableSupports expansion batteries from BLUETTI. You can increase capacity without replacing the base unit. A significant long-term advantage.
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.
Both units support expansion, but the Apex 300 + 2*B500K's higher solar ceiling (2,400W vs 1,000W) gives it a stronger off-grid growth path. More solar input means you can add panels as your setup grows.
The Bottom Line
The full picture comes down to this. The Apex 300 + 2*B500K edges ahead on our overall analysis, but the margin is narrow enough that your specific use case should drive the decision. Review the scenario verdicts above — if the DELTA 3 Plus wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the DELTA 3 Plus nor the Apex 300 + 2*B500K feels like the right fit, your power needs probably sit outside what these two target. Use our comparison tool above to explore alternatives that better match your specific wattage and runtime requirements. Prices on portable power stations fluctuate frequently. Both EcoFlow and BLUETTI discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
DELTA 3 Plus vs Apex 300 + 2*B500K — answered by our testing team.
Q.Is the Apex 300 + 2*B500K worth $4,991 more than the DELTA 3 Plus?
The short answer: yes, if you'll actually use the extra capability. The Apex 300 + 2*B500K costs $4,991 more, but that premium buys you 11,980.8Wh more battery capacity (that's 68 extra hours of running a mini-fridge); 2,040W higher AC output (opening the door to more demanding appliances); 1,400W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.44/Wh vs $0.68/Wh. Factor in cycle life and the math flips: the Apex 300 + 2*B500K costs $0.13/kWh over its lifetime vs $0.17/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
Q.How does the 11,980.8Wh capacity difference actually affect daily use?
The Apex 300 + 2*B500K's 13,004.8Wh battery keeps a mini-fridge running for roughly 74 hours vs the DELTA 3 Plus's 6 hours. Where it really matters: during an 8-hour blackout running your fridge, router, lights, AND charging your phone simultaneously (about 1,645Wh total), the Apex 300 + 2*B500K handles it while the DELTA 3 Plus runs dry. What specs don't mention: runtime drops 20-30% in cold weather (below 32°F/0°C) as battery chemistry slows down. The Apex 300 + 2*B500K's extra capacity provides a critical cold-weather buffer. For occasional phone and laptop charging, both are overkill. This gap only matters for sustained, multi-appliance use.
Q.Can I actually carry the Apex 300 + 2*B500K, or is the DELTA 3 Plus the only portable option?
At 27 lbs, the DELTA 3 Plus is manageable for one person over short distances: parking lot to campsite, trunk to tailgate. The Apex 300 + 2*B500K at 282.2 lbs? You'll want a buddy, a wagon, or wheels. For reference, 282.2 lbs is about the weight of a bag of concrete. If your use case involves any carrying, the DELTA 3 Plus wins decisively.
Q.How fast can each unit recharge from solar panels in real conditions?
On paper, the Apex 300 + 2*B500K accepts 2,400W vs the DELTA 3 Plus's 1,000W of solar input. What the spec sheet won't tell you: solar panels typically deliver only 60-80% of their rated output due to panel angle, cloud cover, and temperature. In realistic conditions, expect full recharge in about 7.7 hours for the Apex 300 + 2*B500K and 1.5 hours for the DELTA 3 Plus. That gap widens on cloudy days, when the Apex 300 + 2*B500K's higher input ceiling captures more of whatever sunlight is available. One more thing: summer gives you ~7 productive solar hours per day. Winter drops to ~4. If solar is your primary recharge method, the Apex 300 + 2*B500K's advantage is substantial.
Q.Is EcoFlow or BLUETTI more reliable for long-term ownership?
Both brands have strengths and trade-offs. EcoFlow: Mixed. 2-5 years depending on model (DELTA Pro Ultra line gets 10 years). Some users report smooth claims; others report runarounds. Register your product to extend coverage. BLUETTI: Check manufacturer warranty policy directly One piece of advice from the power station community: regardless of brand, buy from Costco or Amazon. Their return policies provide a safety net that manufacturer warranties alone can't match, especially for a product you'll rely on in emergencies. Both brands use LFP (lithium iron phosphate) batteries in their current lineup, the most proven chemistry for longevity and safety.
Q.Bottom line: should I buy the DELTA 3 Plus or the Apex 300 + 2*B500K?
We'd pay the premium for the Apex 300 + 2*B500K. Yes, it costs more. The capability jump is real: you're stepping into a tier that handles appliances the base model can't start. The DELTA 3 Plus is still solid if budget is the priority, but the Apex 300 + 2*B500K will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Still Deciding?
These expert guides cover the best picks for your use case — with calculators, comparison tables, and recommendations.
Emergency / UPS Guide
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Read GuideCPAP Power Guide
Tested runtime with ResMed & Philips machines
Read GuideBest for RV
Off-grid power stations with solar input & expansion
Read GuideBudget Picks Under $500
Best value per watt-hour for casual use
Read GuideFull Comparison Tool
Compare DELTA 3 Plus vs Apex 300 + 2*B500K side-by-side with every spec
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