Head-to-head test
BLUETTI Apex 300 + 2×B300K vs BLUETTI EP500
Real-world runtimes, scenario verdicts, and ownership costs compared — which wins for your use case.
Full profiles: BLUETTI Apex 300 + 2×B300K → · BLUETTI EP500 →
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
Spec deltas
Both carry the BLUETTI name, but they're built for different buyers. The Apex 300 + 2×B300K (8,294Wh, 3,840W) and the EP500 (5,120Wh, 2,000W) come from different product lines with different engineering priorities and a $700 price gap. The Apex 300 + 2×B300K 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×B300K's 3,840W inverter has the headroom for a window AC, a full-size fridge, and power tools. The EP500's 2,000W inverter still runs most single appliances; the Apex 300 + 2×B300K's real edge is surge headroom for the biggest motor starts and stacking several heavy loads at once. On stamina, the Apex 300 + 2×B300K keeps a fridge alive for roughly 47 hours vs the EP500's 29 hours. The cost? Portability. At 213.9 lbs, the Apex 300 + 2×B300K is spread across boxes you site once and leave. The EP500 at 167 lbs is more manageable, though still not light.
Pick the Apex 300 + 2×B300K if your primary use is 8-hour blackout or van life daily. Go with the EP500 if its specific strengths below line up better with your use. Most buyers stop at the sticker price and miss this: over a full lifespan the Apex 300 + 2×B300K works out to about $0.07/kWh against the EP500's $0.17, a gap that compounds in the Apex 300 + 2×B300K's favor the more you cycle it. 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 Apex 300 + 2×B300K
With a massive 3,840W output, the Apex 300 + 2×B300K can run high-wattage appliances like space heaters, hair dryers, and electric grills without tripping. Weighing in at 213.9 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 $0.45 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Larger battery capacity
- +Higher AC output
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Significantly heavier (+46.9 lbs), making it harder to move.
- –Very heavy unit that may be difficult for one person to lift.
BLUETTI EP500
The 2,000W inverter handles most daily devices like laptops, blenders, and TVs, but will struggle with heating elements that require over 1500W. Weighing in at 167 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 $0.59 per watt-hour, it's one of the most cost-effective options on the market.
Strengths
- +Costs $700 less
- +Lighter by 46.9 lb
Trade-offs
- –Weaker inverter (-1,840W) limits appliance compatibility.
- –Very heavy unit that may be difficult for one person to lift.
- –Sealed capacity — the Apex 300 + 2×B300K can add batteries to grow past 5,120Wh; this one can't.
- –Shorter-lived battery — rated for 3,500 charge cycles vs the Apex 300 + 2×B300K's 6,000, so it wears out sooner.
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 Apex 300 + 2×B300K is 213.9 lbs and the EP500 167 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
Apex 300 + 2×B300K
Both survive the night. The Apex 300 + 2×B300K finishes at 23% used with 5,405Wh left — 3.3 more nights like it. The EP500 finishes at 38% with 2,707Wh, 1.6 more nights like it. If your outages tend to run past one evening, that difference is the whole argument between them.
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 EP500 doesn't publish a figure, so there's nothing to hold it to. Buy on price, weight, and whether you can live with a fan you haven't heard.
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. The EP500 lists 100W of USB-C for direct laptop charging; the Apex 300 + 2×B300K carries no USB-C at all, so a laptop there goes through the inverter and you are carrying its brick.
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 Apex 300 + 2×B300K is 213.9 lbs and the EP500 167 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
Apex 300 + 2×B300K
The EP500 doesn't finish — 4,352Wh usable against the 4,685Wh this needs leaves it 333Wh short, about 93% of the scenario covered (its nameplate 5,120Wh actually clears this — the flat 15% conversion allowance is what tips it under). The Apex 300 + 2×B300K covers it with 2,365Wh to spare.
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: Apex 300 + 2×B300K runs 34.4h vs 21.2h.
$3,699 list · direct from BLUETTI
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 0–470hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–94hHigh-Draw Appliances
These reveal the real limitsscale 0–7.1h¹ 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 10, 2026
Verdict: the Apex 300 + 2×B300K, on Power Score margin
These two units are closely matched on individual specs, but our Power Score analysis gives the Apex 300 + 2×B300K the edge with a composite score of 7,438 vs 4,720.
Overall score margin: 7,438 vs 4,720 (+57.6%)
List prices as of July 10, 2026. The links below open BLUETTI's current price.
$3,899.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
or check the EP500 price$2,999.00 list
Written by Gunner Gustafson, Whole-Home Backup Tester · Station Arena Test Desk · Updated July 10, 2026
Black Friday · 38 days out
Prices to beat:Apex 300 + 2×B300K $3,699EP500 $2,999
We have never seen either discounted, so any real cut would be a first.
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, Apex 300 + 2×B300K rates 3.4/5 (7th percentile of 29 Whole-Home / Off-Grid-class units), and EP500 rates 3.4/5 (5th percentile of 20 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.
Weight Reality Check
Neither unit is grab-and-go. The EP500 (167 lbs) is a two-person lift. The Apex 300 + 2×B300K (213.9 lbs) is spread across its boxes — no single lift, but nothing you reposition on a whim. That's a 47 lb difference, and it is paid once — getting the heavier one into position, not every time you move it.
Apex 300 + 2×B300K: 45dB Published
45dB is about as loud as a running refrigerator. It is BLUETTI's own rating rather than a reading on a shared bench — makers differ on whether they quote a best case or a figure under load, so treat it as a starting point rather than what you would hear at a bedside. For most people, fan noise around 45dB and up is where sleep starts to suffer.
EP500: Fixed Capacity
The EP500 is sealed at 5,120Wh — fine if that covers you, but it's the ceiling. By contrast the Apex 300 + 2×B300K can add expansion batteries, though the first thing it has over the EP500 is its own 8,294Wh base — expansion is the step after that, for the buyer who would outgrow 8,294Wh as well.
Apex 300 + 2×B300K: Power Lifting to 7,680W
The Apex 300 + 2×B300K has BLUETTI's Power Lifting mode, which runs a resistive appliance rated up to 7,680W from its 3,840W inverter. It does that by delivering less power than the appliance asks for, not more than the inverter has: the heater still works, it just heats more slowly. Two things follow. BLUETTI scopes the mode to purely resistive loads — a heater, a kettle, an incandescent lamp — so it does nothing for a fridge compressor, a pump or a power tool, and this record publishes no surge figure at all, so read the mode as a resistive-load feature rather than as starting ability. And it is not a reason to size down, because running a load that big from 8,294Wh is a short session either way. Genuinely useful if a heater or a kettle is why you're buying; beside the point otherwise. Our record for the EP500 carries no Power Lifting figure, only a 4,800W surge peak, which is a different rating, so check BLUETTI's own spec sheet before reading this as something the EP500 lacks.
UPS Switchover: ≤10ms vs ≤20ms
Both list a UPS mode, at different rated speeds. The Apex 300 + 2×B300K is rated ≤10ms — quick enough on paper that desktop PCs and routers should ride through, treating that as the rating it is. The EP500 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.
Warranty: No Difference
Both units carry the same 5-year warranty, so coverage isn't a tiebreaker here. Both figures are maximums rather than guarantees — they depend on buying direct from BLUETTI or registering the unit, since reseller purchases carry a shorter term.
Battery Lifespan in Real Years
The Apex 300 + 2×B300K 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 8,294Wh on the Apex 300 + 2×B300K and 5,120Wh on the EP500, so count lifetime energy — roughly 49,766 kWh against 17,920 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.
EP500: Noise Level Not Disclosed
The Apex 300 + 2×B300K publishes its noise level (45dB); the EP500 doesn't publish one. That isn't evidence the EP500 is louder — it means there's no figure to hold it to, and no way to compare the two on this without hearing them. If you're buying for a bedroom, a CPAP, or an apartment, treat the Apex 300 + 2×B300K's 45dB as the only published number on the table — a spec-sheet figure, not a measurement — and look for hands-on reports of the EP500 before deciding.
Full record above — the Test Desk pick is the Apex 300 + 2×B300K.
Check Apex 300 + 2×B300K price →or check the EP500 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 EP500 is cheaper to buy, but the Apex 300 + 2×B300K is cheaper to own. At $0.07/kWh over its lifetime vs $0.17/kWh, the Apex 300 + 2×B300K's higher cycle life and capacity make each dollar go further over the years.
Delivers each lifetime kWh for $0.10 less — check the Apex 300 + 2×B300K price →
Growth path
Apex 300 + 2×B300K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 8,294Wh.
Accepts up to 2,400W of solar. Enough for a serious multi-panel array.
Limited ports. You'll likely need a power strip or splitter.
Expansion batteries are BLUETTI-specific. You're investing in the BLUETTI ecosystem.
EP500
FIXED CAPACITYFixed at 5,120Wh — a sealed, complete system rather than a starting point. There's no expansion port, so that figure is the ceiling: check it against your longest unplugged stretch before you buy.
Accepts up to 1,200W of solar. Enough for a serious multi-panel array.
Adequate ports for most setups, but heavy users may want a power strip.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
The EP500 is sealed at 5,120Wh, which is fine if that covers you. The Apex 300 + 2×B300K starts at 8,294Wh and can grow beyond it with BLUETTI expansion batteries — real headroom the EP500 doesn't have if your needs climb toward partial-home backup.
The Bottom Line
The full picture comes down to this. The Apex 300 + 2×B300K 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 EP500 wins in the scenarios that match your life, it's the right choice regardless of aggregate scores.
If neither the Apex 300 + 2×B300K nor the EP500 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.
Is the Apex 300 + 2×B300K worth $700 more than the EP500?
The short answer: yes, if you'll actually use the extra capability. The Apex 300 + 2×B300K costs $700 more, but that premium buys you 3,174.4Wh more battery capacity (that's 18 extra hours of running a mini-fridge); 1,840W higher AC output (opening the door to more demanding appliances); a longer-lasting battery rated for 6,000 cycles — that's 16 years at daily use; 1,200W faster solar charging for quicker off-grid recovery. On a cost-per-watt-hour basis, you're paying $0.45/Wh vs $0.59/Wh. Factor in cycle life and the math flips: the Apex 300 + 2×B300K costs $0.07/kWh over its lifetime vs $0.17/kWh. The "expensive" unit is actually cheaper to own. For regular use, we'd pay the premium.
How does the 3,174.4Wh capacity difference actually affect daily use?
The Apex 300 + 2×B300K's 8,294.4Wh battery keeps a mini-fridge running for roughly 47 hours vs the EP500's 29 hours. Both can handle a full 8-hour blackout setup (fridge + router + lights + phone charging ≈ 1,645Wh), but the Apex 300 + 2×B300K 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 + 2×B300K'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 Apex 300 + 2×B300K, or is the EP500 the only portable option?
Neither is "portable" in any hiking sense. The EP500 (167 lbs) and the Apex 300 + 2×B300K (213.9 lbs) are both appliances you place and leave. The 46.9-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 300 + 2×B300K accepts 2,400W vs the EP500's 1,200W 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 4.9 hours for the Apex 300 + 2×B300K and 6.1 hours for the EP500. That gap widens on cloudy days, when the Apex 300 + 2×B300K'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×B300K's advantage is substantial.
"6,000 vs 3,500 cycles" — what does that actually mean for me?
In real years: the Apex 300 + 2×B300K (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 EP500 (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 8,294.4Wh unit becomes a ~6,636Wh unit. Still very usable. For weekend users, both batteries will outlast the warranty by years.
What if I need more capacity than the EP500's 5,120Wh later?
The EP500 is sealed at 5,120Wh, so if you expect your needs to climb, the Apex 300 + 2×B300K is the more future-proof pick: it starts at 8,294.4Wh and adds BLUETTI-compatible batteries without replacing the base unit. That said, "not expandable" isn't a flaw on its own — if 5,120Wh comfortably covers your loads, the EP500 is a complete unit, not a downgrade.
Bottom line: should I buy the Apex 300 + 2×B300K or the EP500?
We'd pay the premium for the Apex 300 + 2×B300K. 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 EP500 is still solid if budget is the priority, but the Apex 300 + 2×B300K will leave you less likely to wish you'd "gone bigger" six months from now. That regret costs more than the price difference.
Where to buy
BLUETTI Apex 300 + 2×B300KPick
$3,899.00
$3,899.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
BLUETTI EP500
$2,999.00
$2,999.00 · direct from BLUETTI
Last checked 16 days ago. Prices move — check before you buy.
Prices may vary by retailer and are subject to change.