BLUETTI Apex 300 vs BLUETTI Apex 300 + B500K
Both carry the BLUETTI name, but they're built for different buyers. The Apex 300 (2,765Wh, 3,840W) and the Apex 300 + B500K (7,885Wh, 3,840W) come from different product lines with different engineering priorities and a $1,400 price gap. We'd buy the Apex 300.
The Apex 300 + B500K's 7,885Wh keeps a fridge going for 45 hours. The Apex 300's 2,765Wh manages 16 hours. The bigger unit rides out a full weekend outage. The smaller one needs a recharge by Saturday night. But if your actual use case is camping, tailgating, or keeping devices charged, the Apex 300 does the job at 173 lbs and $1,799 — no overkill, no regret.
Pick the Apex 300 if you want maximum capability and room to grow. Go with the Apex 300 + B500K if you primarily need it for weekend camping or 8-hour blackout. Most buyers overlook this: the Apex 300 + B500K costs ~$0.12/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.
Power Station Arena is reader-supported. We may earn a commission when you buy through our links — at no cost to you. Learn more.
The Breakdown
What each unit does well, where it falls short, and the trade-offs that matter.
Apex 300 Analysis
With a massive 3,840W output (and 7,680W surge), the Apex 300 can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 173 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- Save $1,400 vs Competitor
- 10 lbs Lighter
Trade-offs & Considerations
- Very heavy unit that may be difficult for one person to lift.
Apex 300 + B500K Analysis
With a massive 3,840W output (and 7,680W surge), the Apex 300 + B500K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 183 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 $0.41 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- Larger Battery Capacity
Trade-offs & Considerations
- Substantially more expensive (+$1,400) than the Apex 300.
- 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.
Weight Reality Check
Watch outNeither unit is grab-and-go. The Apex 300 (173 lbs) is a two-person lift. The Apex 300 + B500K (183 lbs) is firmly a two-person lift. It goes where you put it and stays there. That's a 10 lb difference.
Fan Noise Under Load
NoteThe Apex 300 runs at 45dB (like a running refrigerator), while the Apex 300 + B500K hits 45dB (like a running refrigerator). Most people find anything above 45dB disruptive for sleep. Worth considering if you're running a CPAP or camping in a tent nearby.
Warranty Value Comparison
NoteThe Apex 300 gives you 2.8 years of warranty per $1,000 spent, vs the Apex 300 + B500K's 1.6 years. That's 1.8× 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 Apex 300 cuts it close at 89%. One cold night or an unexpected device and you're rationing power. The Apex 300 + B500K finishes at 31%, 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.
8-Hour Blackout
8 hours
Keep the essentials running through a night without power
Both survive, but the Apex 300 + B500K finishes at just 25% used. That's enough reserve for a second blackout night. The Apex 300 at 70% leaves little margin if the outage runs longer than expected. In storm-prone areas, that remaining capacity is insurance.
CPAP Overnight
8 hours
Sleep therapy without interruption — the #1 medical use case
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.
Remote Workday
8 hours
Full work day off-grid without power anxiety
The Apex 300 + B500K gives you a comfortable buffer at 14%. Enough to work late, join extra video calls, or charge a second device without worry. The Apex 300 at 39% works but leaves less room for the unexpected. For daily remote work, that peace of mind matters.
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 + B500K's extra margin is nice but not decisive here. Consider weight instead: you're carrying this to a parking lot, and 10 lbs makes a real difference when loading up.
Van Life Daily
24 hours
A full day of mobile living — the ultimate endurance test
The Apex 300 runs out of juice. It only has 2,350Wh usable, but this scenario needs 4,685Wh. The Apex 300 + B500K covers it and still has 134h 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 | Apex 300 | Apex 300 + B500K |
|---|---|---|
😴 CPAP Machine 40W draw | 58.8h7 full nights | ★167.6h20 full nights |
📱 Phone Charger 15W draw | 156.7h | ★446.8h |
📡 Router + Modem 20W draw | 117.5h | ★335.1h |
💡 LED Lights (4 bulbs) 40W draw | 58.8h | ★167.6h |
💻 Laptop (Working) 60W draw | 39.2h | ★111.7h |
Comfort & Convenience
Makes off-grid life actually enjoyable| Appliance | Apex 300 | Apex 300 + B500K |
|---|---|---|
🌀 Box Fan 75W draw | 31.3h | ★89.4h |
📺 LED TV (55") 80W draw | 29.4h | ★83.8h |
🧊 Mini-Fridge 150W draw | 15.7h | ★44.7h |
🛏️ Electric Blanket 200W draw | 11.8h1 full night | ★33.5h4 full nights |
High-Draw Appliances
These reveal the real limits| Appliance | Apex 300 | Apex 300 + B500K |
|---|---|---|
☕ Coffee Maker 1000W draw | 2.4h | ★6.7h |
🍽️ Microwave 1200W draw | 2h | ★5.6h |
🔥 Space Heater 1500W draw | 1.6h | ★4.5h |
Runtime = (capacity × 0.85) ÷ appliance watts. Actual runtime varies with battery age, temperature, and simultaneous loads.
Expert Verdict
Apex 300 Wins on Value & Performance
The Apex 300 outperforms the Apex 300 + B500K in key areas. It offers . Crucially, it costs $1,400 less, making it the smarter financial choice.
Based on 18+ spec comparisons and real-world performance data
Power Score Breakdown
How each unit performs across our segmented benchmarks
| Benchmark | Apex 300 | Apex 300 + B500K |
|---|---|---|
| Overall Power Score | 4,936Appliance Class | ★7,794The AC & Fridge Zone |
| UPSResponse & Reliability | 4,107 | ★5,666 |
| RV LivingEnergy Density & Output | 5,013 | ★7,731 |
| Home BackupCapacity & Resilience | 4,963 | ★7,871 |
| CPAPSleep Therapy Reliability | 3,333 | ★5,193 |
| Solar GeneratorSolar Input & Efficiency | 4,947 | ★7,048 |
| Food TruckSustained Heavy Output | 4,914 | ★7,074 |
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 | Apex 300 | Apex 300 + B500K |
|---|---|---|
| Price | ★$1,799.00 | $3,199.00 |
| Capacity (Wh) | 2764.8 | ★7884.8 |
| Output (W) | 3840 | 3840 |
| Surge Peak | 7680W | 7680W |
| AC Outlets | 6 | 6 |
| USB-C Charging Outputs | 100W | 100W |
| Solar Input (W) | 2400 | 2400 |
| Weight (lbs) | ★173 | 183 |
| UPS | Yes (<10ms) | Yes (<10ms) |
| Charging Cycles | 3500+ | 3500+ |
| Warranty (Years) | 5 | 5 |
| Battery Expansion Feasibility | Yes | Yes |
| App Control | Yes | Yes |
| $/Watt Hour | $.65 | ★$.41 |
| Noise Level (db) | 45 | 45 |
| Solar Input Type | MC4 | MC4 |
| USB-A Ports | 2 | 2 |
| USB-C Ports | 2 | 2 |
| Cost per Wh (calculated) | $0.65/Wh | ★$0.41/Wh |
Beyond the Specs: Owning It
What happens after you click “Buy” — reliability, brand trust, growth potential, and true cost of ownership.
Lifetime Value
Apex 300
Battery lifespan: 9.6yr daily · 33.7yr weekends · 67.3yr weekly
Apex 300 + B500K
Battery lifespan: 9.6yr daily · 33.7yr weekends · 67.3yr weekly
The Apex 300 is cheaper to buy, but the Apex 300 + B500K is cheaper to own. At $0.12/kWh over its lifetime vs $0.19/kWh, the Apex 300 + B500K's higher cycle life and capacity make each dollar go further over the years.
Growth Path
Apex 300
✓ 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.
Apex 300 + 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.
Neither locks you out of growth. Pick based on other factors.
The Bottom Line
The full picture comes down to this. The Apex 300 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 Apex 300 + B500K wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the Apex 300 nor the Apex 300 + B500K feels like the right fit, your power needs probably sit outside what these two target. For lighter use — weekend camping or phone/laptop charging — you'd be overpaying for capacity you'll rarely tap. Consider a unit in the 500–1,500Wh range instead. Prices on portable power stations fluctuate frequently. Both BLUETTI discount regularly, so check the current price before committing. Prime Day and Black Friday pricing typically drops 20-30%.
Frequently Asked Questions
Apex 300 vs Apex 300 + B500K — answered by our testing team.
Q.Is the Apex 300 + B500K worth $1,400 more than the Apex 300?
A tough sell. The Apex 300 + B500K offers 5,120Wh more battery capacity (that's 29 extra hours of running a mini-fridge), but $1,400 is a steep premium for a single upgrade. At $0.65/Wh, the Apex 300 delivers better bang for your buck. Unless that advantage is non-negotiable, save the cash. Better yet, put it toward a solar panel that pays for itself in free charges.
Q.How does the 5,120Wh capacity difference actually affect daily use?
The Apex 300 + B500K's 7,884.8Wh battery keeps a mini-fridge running for roughly 45 hours vs the Apex 300's 16 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the Apex 300 + B500K finishes with significantly more margin. That matters if conditions aren't ideal or the outage runs long. 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 + 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.Bottom line: should I buy the Apex 300 or the Apex 300 + B500K?
We'd buy the Apex 300. Strong value at a lower price, and for most real-world use cases the spec gaps don't translate to meaningful capability gaps. The Apex 300 + B500K makes sense only if you specifically need its higher capacity for demanding sustained loads like full-home backup or commercial use.
Still Deciding?
These expert guides cover the best picks for your use case — with calculators, comparison tables, and recommendations.
Best for RV
Off-grid power stations with solar input & expansion
Read GuideEmergency Prep Guide
Blackout-tested picks with runtime calculator
Read GuideSolar Generators
Ranked by solar charge speed — panels + station bundles
Read GuideBudget Picks Under $500
Best value per watt-hour for casual use
Read GuideFull Comparison Tool
Compare Apex 300 vs Apex 300 + B500K side-by-side with every spec
Open ToolReady to Decide?
View current pricing from authorized retailers.
Prices may vary by retailer and are subject to change.