Head-to-head test
BLUETTI AC300 + 4×B300 vs BLUETTI Apex 200 + B500K
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: BLUETTI AC300 + 4×B300 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Gunner’s take
Whole-Home Backup Tester
Both carry the BLUETTI name, but they're built for different buyers. The AC300 + 4×B300 (12,288Wh, 3,000W) and the Apex 200 + B500K (7,680Wh, 3,600W) come from different product lines with different engineering priorities and a $2,797 price gap. We'd buy the Apex 200 + B500K.
What the spec gap means in practice: the AC300 + 4×B300's 3,000W inverter has the headroom for a window AC, a full-size fridge, and power tools. The Apex 200 + B500K's 3,600W inverter still runs most single appliances; the AC300 + 4×B300's real edge is surge headroom for the biggest motor starts and stacking several heavy loads at once. On stamina, the AC300 + 4×B300 keeps a fridge alive for roughly 70 hours vs the Apex 200 + B500K's 44 hours. The cost? Portability. At 367.2 lbs, the AC300 + 4×B300 is spread across boxes you site once and leave. The Apex 200 + B500K at 158.7 lbs is more manageable, though still not light.
Pick the Apex 200 + B500K if you want the unit that wins the head-to-head on balance. Go with the AC300 + 4×B300 if you primarily need it for van life daily. Keep scrolling for the full breakdown. The scenario verdicts below hold a few surprises.
Bench Notes
What each unit does well, where it falls short, and the trade-offs that matter.
BLUETTI AC300 + 4×B300
With a massive 3,000W output (and 6,000W surge), the AC300 + 4×B300 can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 367.2 lbs, this is not a unit you want to carry far. It's best suited as a stationary backup or RV companion.
Strengths
- +Larger battery capacity
- +Longer warranty
Trade-offs
- –Significantly heavier (+208.5 lbs), making it harder to move.
- –Weaker inverter (-600W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the Apex 200 + B500K's 6,000, so it wears out sooner.
BLUETTI Apex 200 + B500K
With a massive 3,600W output, the Apex 200 + B500K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 158.7 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 $0.36 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Lighter by 208.5 lb
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
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
Neither unit
Scoring these two at a campsite is a category error: neither travels — the AC300 + 4×B300 is 367.2 lbs and the Apex 200 + B500K 158.7 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
Either unit
Both survive the blackout with similar margin, and both list a UPS mode — compare their stated switchover classes, and remember those are manufacturer ratings, not measurements.
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
A CPAP is about 40W for eight hours, so both of these cover the night several times over — capacity isn't the question here. What would separate them is fan noise, but neither maker publishes a fan-noise figure, so there's nothing to hold either of them to. Only the Apex 200 + B500K is still sold, so for a new buy it takes this by default; the AC300 + 4×B300 is worth weighing on weight and fan noise only if you already own one.
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 strain. At these utilization levels the real difference is USB-C for direct laptop charging — 140W on the Apex 200 + B500K against 100W — which beats the inverter for convenience 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
Neither unit
Scoring these two at a tailgate is a category error: neither travels — the AC300 + 4×B300 is 367.2 lbs and the Apex 200 + B500K 158.7 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
AC300 + 4×B300
The Apex 200 + B500K uses 72% of its battery on a full day, leaving 1,843Wh — miss a solar day and that is the entire cushion. The AC300 + 4×B300 at 45% keeps 5,760Wh in hand, a far more forgiving rhythm for full-time living.
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: AC300 + 4×B300 runs 51h vs 31.8h.
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 0–696.3hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–139.3hHigh-Draw Appliances
These reveal the real limitsscale 0–10.4h¹ 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 10, 2026
Verdict: the Apex 200 + B500K
The Apex 200 + B500K takes it on balance: 600W more output than the AC300 + 4×B300, against 4,608Wh less capacity. It is also 208.5 lbs lighter.
Overall score margin: 8,742 vs 7,363 (+18.7%)
List prices as of July 10, 2026. The links below open BLUETTI's current price.
$2,799.00 · direct from BLUETTI
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 10, 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.
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, AC300 + 4×B300 rates 3.3/5 (3rd percentile of 39 Whole-Home / Off-Grid-class units), and Apex 200 + B500K rates 3.6/5 (18th percentile of 39 Whole-Home / Off-Grid-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.
Weight Reality Check
Neither unit is grab-and-go. The Apex 200 + B500K (158.7 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. The AC300 + 4×B300 (367.2 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. That's a 209 lb difference, and it is paid once — getting the heavier one into position, not every time you move it.
UPS Switchover: ≤15ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 200 + B500K is rated ≤15ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. The AC300 + 4×B300 is rated ≤20ms — fine on paper for routers and most electronics; the fussiest PC power supplies sit right at this line. If a computer with unsaved work is the thing being protected, the stated class is worth the attention; nothing here is a lab result.
Battery Lifespan in Real Years
The Apex 200 + B500K is rated for 6,000 cycles vs 3,500. In real life: at daily use, that's 16.4 vs 9.6 years. At weekend use (twice a week), it's 58 vs 34 years. One caution reading years across different sizes: a cycle is 7,680Wh on the Apex 200 + B500K and 12,288Wh on the AC300 + 4×B300, so count lifetime energy — roughly 46,080 kWh against 43,008 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 200 + B500K.
Check Apex 200 + B500K price →Ownership 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 AC300 + 4×B300 is no longer sold, so there is no price to work its cost per kWh from, and this comparison doesn't quote one. On what you can actually buy today, the Apex 200 + B500K works out at $0.06/kWh over its rated life. If you already own the AC300 + 4×B300, the hardware comparison still holds: over its rated life the AC300 + 4×B300 delivers about 43,008 kWh and the Apex 200 + B500K about 46,080 kWh.
Growth path
AC300 + 4×B300
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 12,288Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
Apex 200 + B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 7,680Wh.
Accepts up to 3,000W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
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
Growth only counts if you can still buy in, and the AC300 + 4×B300 is no longer sold (BLUETTI points owners to the Apex 300 + 2*B500K). That leaves the Apex 200 + B500K: it starts at 7,680Wh and takes BLUETTI expansion batteries, so the ceiling moves if your needs do. The AC300 + 4×B300's expandability still matters if you already own one, but it isn't a reason to pick it over the Apex 200 + B500K.
The Bottom Line
The full picture comes down to this. The Apex 200 + 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 AC300 + 4×B300 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the AC300 + 4×B300 nor the Apex 200 + 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
Answers drawn from the spec record and cited owner research.
How does the 4,608Wh capacity difference actually affect daily use?
The AC300 + 4×B300's 12,288Wh battery keeps a mini-fridge running for roughly 70 hours vs the Apex 200 + B500K's 44 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the AC300 + 4×B300 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 AC300 + 4×B300'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.
Can I actually carry the AC300 + 4×B300, or is the Apex 200 + B500K the only portable option?
Neither is "portable" in any hiking sense. The Apex 200 + B500K (158.7 lbs) and the AC300 + 4×B300 (367.2 lbs) are both appliances you place and leave. The 208.5-lb difference matters when loading into a vehicle or moving between rooms, but that's about it. If true portability is your priority, look at units under 20 lbs in a different class entirely.
How fast can each unit recharge from solar panels in real conditions?
On paper, the Apex 200 + B500K accepts 3,000W vs the AC300 + 4×B300's 2,400W 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 3.7 hours for the Apex 200 + B500K and 7.3 hours for the AC300 + 4×B300. That gap widens on cloudy days, when the Apex 200 + 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 200 + B500K's advantage is substantial.
"6,000 vs 3,500 cycles" — what does that actually mean for me?
In real years: the Apex 200 + B500K (6,000 cycles) lasts 16.4 years at daily use, 58 years at weekend use (twice a week), or 250 years at twice-monthly camping trips. The AC300 + 4×B300 (3,500 cycles): 9.6 years daily, 34 years weekends, or 146 years twice-monthly. What most people miss: hitting the cycle limit doesn't kill your battery. Capacity drops to about 80%. Your 7,680Wh unit becomes a ~6,144Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
Bottom line: should I buy the AC300 + 4×B300 or the Apex 200 + B500K?
We'd buy the Apex 200 + B500K. The AC300 + 4×B300 is no longer sold, so there is no price to weigh it against; the comparison on this page still helps if you own one.
Where to buy
BLUETTI AC300 + 4×B300
Sold out at BLUETTI
BLUETTI Apex 200 + B500KPick
$2,799.00
$2,799.00 · direct from BLUETTI
Prices may vary by retailer and are subject to change.