Head-to-head test
BLUETTI Apex 300 + 2×B500K vs BLUETTI EP900 + 2×B500
$5,690 buys you 13,004.8Wh you can plug in tomorrow; the extra $4,608 for the EP900 + 2×B500 buys 3,084.8Wh less capacity plus a 9,000W solar ceiling and a 10-year warranty you're paying for now and cashing in over the next decade.
Written by Gunner GustafsonUpdated
Whole-Home Backup Tester, Station Arena Test Desk
BLUETTI
Apex 300 + 2×B500K
10,174Power Score · Whole-Home Capable
$4,999.00 list · direct from BLUETTI
BLUETTI
EP900 + 2×B500
10,574Power Score · Whole-Home Capable
$10,298.00 list · direct from BLUETTI
Spec deltas
The Apex 300 + 2×B500K costs $5,690 and holds 13,004.8Wh. The EP900 + 2×B500 costs $10,298 — $4,608 more — and holds 9,920Wh, which is 3,084.8Wh less energy for nearly double the money. That's the whole matchup before you even get to output or warranty.
The EP900 doesn't lose on paper everywhere: 7,600W continuous output more than doubles the Apex 300's 3,840W, its 9,000W solar ceiling is nearly four times larger, and BLUETTI backs it with a 10-year warranty against the Apex's 5. It's built to run a house, not just fill a garage or a driveway.
But for the scenarios these units are actually bought for — weekend camping, a blackout, running a CPAP overnight, a remote workday, van life — both handle the load with room left over, and the Apex 300 does it for $0.13 per lifetime kWh against the EP900's $0.17. If you don't need 7,600W or a 9,000W solar array, you're paying a premium for headroom you won't touch.
What the Numbers Reveal
Each conclusion stated first — the numbers behind it on one line, the full analysis below.
Capacity
This isn't a bigger-battery-costs-more tradeoff. The EP900 + 2×B500's premium is entirely for the inverter and warranty, not for stored energy — a buyer shopping on capacity alone is paying more to get less of the thing they came for.
The Apex 300 + 2×B500K holds 13,004.8Wh for $5,690The EP900 + 2×B500 holds 9,920Wh for $10,298
Why it mattersAnyone whose main question is 'how much power can I store' should stop at the price tag and take the Apex 300; the EP900's premium only makes sense if the inverter specs below are the actual reason you're buying.
continuous output
A fridge or AC compressor surges 2-3x its rated draw at startup, and the Apex 300's own 7,680W surge rating shows BLUETTI already engineered it to handle that — the EP900's extra headroom matters for whole-home loads stacked together, not for starting any single appliance.
The EP900 + 2×B500 outputs 7,600W continuous against the Apex 300 + 2×B500K's 3,840WThe EP900 + 2×B500's solar ceiling is 9,000W against the Apex's 2,400W
Why it mattersBuyers backing up an entire house with multiple large appliances running at once should weight the EP900's output; anyone backing up a defined set of circuits or a mobile setup gets no practical benefit from the extra 3,760W.
Every other scenario tested — weekend camping, an 8-hour blackout, a CPAP overnight, a remote workday, a tailgate party — both units clear with room to spare, which means the Apex 300's bigger battery is doing real work only in the load-heavy scenario, not just on the spec sheet.
The scenario engine's Van Life Daily load is 4,685Wh, which the Apex 300 + 2×B500K covers using 42% of capacityThe same load uses 56% of the EP900 + 2×B500's smaller 9,920Wh capacity
Why it mattersBuyers whose actual daily draw runs closer to van-life numbers than campsite numbers should treat the Apex 300's extra capacity as the deciding fact, not a nice-to-have.
weight
That reframes the weight numbers: they're not a portability spec here, they're a placement decision. Figure out where each one lives before it arrives, because moving 282 or 343 lbs a second time is not a casual afternoon.
The Apex 300 + 2×B500K weighs 282.2 lbs and the EP900 + 2×B500 weighs 343 lbsOne owner reports the Apex 300 base unit alone is heavy enough to be effectively immobile once placedA4A9A11
Why it mattersBuyers who need something they can reposition seasonally should look past both of these toward a lighter single-battery unit; buyers installing a fixed backup system can ignore the weight numbers entirely.
The specific dimensions that decide these two units — everything else is a tie.
Lifetime Value
Selected because: The core of the matchup — Apex 300 costs almost half as much per lifetime kWh despite holding more raw capacity.
cost / lifetime kWh
The Apex 300 + 2×B500K costs $0.13 per lifetime kWh; the EP900 + 2×B500 costs $0.17. That gap exists despite the Apex costing $4,608 less up front — the EP900's longer 6,000-cycle life and 10-year warranty narrow the difference but don't close it.
Spread over daily use, the Apex reaches 9.6 years before its warranty math runs out and the EP900 stretches to 16.4 years, so the EP900 is the unit built to be forgotten about for longer. If you plan to keep whatever you buy for a decade-plus, that's the one place its price starts to make sense.
Your Life, Your Pick
Selected because: Both units clear every real-world load tested, which undercuts the case for paying nearly double.
Weekend camping, an 8-hour blackout, a CPAP overnight, a remote workday, and a tailgate party all land the same way: both units clear the load using single-digit-to-20-percent of their capacity. There's no scenario here where the EP900's extra output or the Apex's extra capacity is the difference between running and not running.
Van Life Daily is the exception — a 4,685Wh draw that eats 42% of the Apex's capacity but 56% of the EP900's smaller pack. If your actual use case looks like that scenario rather than a weekend trip, the Apex's bigger battery is carrying real weight, not just padding a spec sheet.
PowerScore Breakdown
Selected because: EP900 wins the composite score on output and solar, worth explaining why that doesn't flip the value verdict.
overall power score
The engine scores the EP900 + 2×B500 slightly higher — 10,574 against 10,032 — almost entirely on output and solar input rather than capacity, where the Apex actually leads by 3,084.8Wh.
That's a score built for a different job: running a house at 7,600W and refilling from a 9,000W array. If your loads never approach that, the composite score is measuring capability you won't use, and the price-per-kWh numbers above are the more honest scoreboard.
What the Specs Don't Tell You
Selected because: Weight, noise, and cycle-life cards all fire and reinforce the install-once framing.
rated cycles
The weight card fires as a warning on both — 282.2 and 343 lbs are two-person, plan-the-placement numbers, not carry-it-out-back numbers. Neither ships as something you reposition on a whim.
Noise and cycle life both fire as informational: the Apex runs 45dB under load against the EP900's 50dB, and the EP900's 6,000-cycle rating against the Apex's 3,500 is most of what's paying for that longer warranty. None of the three cards changes the verdict, but they all confirm the same picture — install once, live with what you chose.
Growth Path
Selected because: Both expand, but the EP900's solar ceiling gives it the real long-term off-grid edge.
solar input
Both units expand with BLUETTI battery add-ons, so neither locks you into today's capacity. Where they split is solar: the EP900's 9,000W ceiling against the Apex's 2,400W means a bigger rooftop or ground-mount array actually has somewhere to send its power.
If solar growth is part of the plan, that ceiling is the EP900's strongest long-term argument — the one place its price tag is buying future capability rather than headroom you already have from the Apex.
Strengths & trade-offs
BLUETTI Apex 300 + 2×B500K
Strengths
- +Costs $5,299 less
- +Lighter by 60.8 lb
- +Larger battery capacity
Trade-offs
- –Weaker inverter (-3,760W) 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 EP900 + 2×B500's 6,000, so it wears out sooner.
BLUETTI EP900 + 2×B500
Strengths
- +Higher AC output
- +Longer warranty
- +Faster solar charging
- +Rated for 6,000 charge cycles — much longer battery lifespan
Trade-offs
- –Substantially more expensive (+$5,299) than the Apex 300 + 2×B500K.
- –Significantly heavier (+60.8 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
Either unit
Both handle two nights comfortably. The EP900 + 2×B500 uses 25% and the Apex 300 + 2×B500K uses 19%. With this little difference, pick based on weight and portability instead. The lighter unit wins for car camping.
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. Since the capacity difference doesn't matter here, focus on which unit has UPS mode — seamless switchover protects your router and PC from the split-second power gap.
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 4% 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
Either unit
Both power your workstation all day without breaking a sweat. At these utilization levels, prioritize the unit with better USB-C output for direct laptop charging. It's more convenient than using the AC inverter 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
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 + 2×B500K
The Apex 300 + 2×B500K clears this one with more room to spare — 42% of capacity used against 56% for the EP900 + 2×B500. This is the one load in the set where the Apex's bigger battery is doing real work, not just padding the spec sheet.
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 + 2×B500K runs 53.9h vs 41.1h.
$4,999 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 0–736.9hComfort & Convenience
Makes off-grid life actually enjoyablescale 0–147.4hHigh-Draw Appliances
These reveal the real limitsscale 0–11.1h¹ 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 15, 2026
Verdict: the Apex 300 + 2×B500K
The Apex 300 + 2×B500K costs $5,690, holds 13,004.8Wh, and works out to $0.13 per lifetime kWh over its 3,500-cycle life. The EP900 + 2×B500 costs $10,298 — nearly double — for 9,920Wh, which is 3,084.8Wh less capacity, and lands at $0.17 per lifetime kWh. The EP900 answers back with real advantages: 7,600W continuous output against 3,840W, a 9,000W solar ceiling against 2,400W, and a 10-year warranty against 5. None of that closes a nearly-$4,600 gap for less capacity if what you actually need is stored energy for camping, blackouts, or van life, all scenarios where both units already have headroom to spare. The EP900's case is real, but it's a whole-home-system case, not a get-more-for-your-money case.
Editor-assigned confidence, based on cited owner research and spec analysis.
List prices as of July 15, 2026. The links below open BLUETTI's current price.
$4,999.00 list · direct from BLUETTI
or check the EP900 + 2×B500 price$10,298.00 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
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, Apex 300 + 2×B500K rates 3.7/5 (25th percentile of 17 Whole-Home / Off-Grid-class units), and EP900 + 2×B500 rates 3.9/5 (38th percentile of 17 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.
Neither of These Is Portable Once Assembled
282.2 lbs and 343 lbs are both two-person, plan-the-placement numbers. Pick where each one lives before it arrives — moving either a second time is not a casual afternoon.
Both Stay Reasonably Quiet Under Load
45dB for the Apex 300 + 2×B500K against 50dB for the EP900 + 2×B500 — both closer to a quiet conversation than a generator. Neither is the deciding factor here.
The Cycle Gap Is Where the Warranty Difference Comes From
3,500 cycles against 6,000 explains most of the gap between the Apex's 5-year warranty and the EP900's 10. If you're keeping the system a decade or more, that longer cycle life is what you're actually paying the premium for.
Full record above — the Test Desk pick is the Apex 300 + 2×B500K.
Check Apex 300 + 2×B500K price →or check the EP900 + 2×B500 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 Apex 300 + 2×B500K wins on both sticker price and long-term value. At $0.11/kWh over its lifetime, it's meaningfully cheaper to own. Clear value winner.
Growth path
Apex 300 + 2×B500K
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 13,005Wh.
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.
EP900 + 2×B500
EXPANDABLESupports BLUETTI expansion batteries, so you can add capacity later without replacing the base unit — useful if your needs may climb past 9,920Wh.
Accepts up to 9,000W 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.
Realistic full solar rechargeat 70% of rated panel output — see methodology
Analyst note
Both expand, but the EP900 + 2×B500's higher solar ceiling (9,000W vs 2,400W) 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.
BLUETTI Apex 300 + 2×B500K
Field commentary on this exact Apex 300 + 2×B500K bundle is thin — it's a recent, niche pairing, and most available reviews test the Apex 300 with the older B300K battery instead. One genuine owner post confirms the B500K pairing directly: a buyer running it with a B500K expansion to power a 50A fifth-wheel RVA10.
Where the evidence does hold up, it's consistent across reviewers: the unit lacks built-in USB and DC ports, requiring a separate $300 Hub D1 accessory to add them backA2A6A12, and the base unit's weight makes it effectively immobile once set down — reviewers describe being unable to carry it more than a few feet or lift it onto a tableA4A9A11. One reviewer did note the fans stay relatively tame under load compared to units that 'sound like small jet engines'A1.
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
Sources
techspective.net · thesolarlab.com · t3.com · trustedreviews.com · notebookcheck.net
BLUETTI EP900 + 2×B500
Owner and installer commentary consistently praises the whole-home capability: one source describes the EP900 running a washer, dryer, heater, and refrigerator off a single 9,000W inverterB1, and an owner reported the 10ms grid-to-battery transfer as completely unnoticeable during an actual outageB3.
Reviewers also point to the expansion math directly — B500 batteries scale capacity from 9.9kWh up to roughly 39.6kWh with eight modules, described as 'weeks of essential backup'B2 — and one owner tied to solar reported they could largely go off-grid and cut utility bills to near zeroB4.
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
Sources
bluettipower.com · bestgeneratorsolar.com · mightygenerators.com · bgr.com · offgridsource.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
- Reviewers consistently note the lack of built-in USB/DC ports, requiring a separate $300 Hub D1 accessory, as a notable and costly design compromise. [Apex 300 + 2×B500K · 3 entries]
- The unit's extreme weight (~85 lbs base, more with expansion batteries) makes it effectively immobile once placed, despite being marketed as 'portable.' [Apex 300 + 2×B500K · 3 entries]
- The modular ecosystem (Hub A1, Hub D1, expansion batteries) is praised for flexibility but criticized for high add-on costs relative to competitors. [Apex 300 + 2×B500K · 3 entries]
- Whole-home 9,000W output, large B500 expandability (to ~39.6kWh), 10ms UPS, and solar off-grid capability are the standout features. [EP900 + 2×B500 · 3 entries]
- A1
“Some units sound like small jet engines under load, but the Apex 300's fans are relatively tame.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [positive]
- A2
“Not having DC or USB ports on the face is a tradeoff. The Hub D1 solves the problem—but it's an additional $300 accessory that you then have to bolt on after the fact.”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [negative]
- A4
“In fact, it's so heavy I can hardly carry it more than a few feet at a time and have been unable to lift it onto a table”
t3.com — Bluetti Apex 300 review · 2025-11 · [negative]
- A6
“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 · unknown · [negative]
- A9
“It's heavy, no question, but the handles and modular battery design make it manageable. I wouldn't drag it to a picnic, but it's a solid choice for home backup”
techspective.net — Bluetti Apex 300 with B300K Review · 2025-09 · [mixed]
- A10
“I recently purchased a Bluetti Apex 300 with a B500K expansion battery to help power our 50A Brinkley 5th wheel.”
BLUETTI Community forum — 'Apex 300 operating mode and settings?' · 2026-02 · [positive]
- A11
“No wheels though, so if you plan on moving it regularly, invest in a cart.”
thesolarlab.com — Bluetti Apex 300 Review · unknown · [negative]
- A12
“This can [be] overwhelming both for buyers and their wallets... these optional accessories also provide a high degree of flexibility.”
notebookcheck.net — Bluetti APEX 300 power storage system review · 2025-08 · [mixed]
- B1
“A whole-home system: one EP900 inverter provides up to 9,000W (18,000W with two units), enough to run a washer, dryer, heater, and refrigerator.”
bluettipower.com / bestgeneratorsolar.com — EP900 + B500 guide · 2026 · [positive]
- B2
“With B500 batteries (4,960Wh each), capacity expands from 9.9kWh up to about 39.6kWh with eight B500 modules — weeks of essential backup.”
bluettipower.com / mightygenerators.com — EP900 + B500 · 2026 · [positive]
- B3
“A fast UPS switches from grid to battery within 10 milliseconds; one owner reported the transfer is completely unnoticeable during outages.”
bgr.com / owner review — EP900 + B500 · 2026 · [positive]
- B4
“Built on reliable LiFePO4 cells; tied to solar, an owner said they can virtually go off-grid and minimize utility bills. Complete systems run roughly $14,500-$15,000 excluding installation.”
bgr.com / offgridsource.com — EP900 + B500 review · 2026 · [positive]
Research compiled July 15, 2026.
Who Should Buy Which
Buy the Apex 300 + 2×B500K if you…
- →Buyers who want maximum stored energy per dollar and don't need to run whole-home loads at once
- →Van life or RV owners whose daily draw runs closer to 4,000-5,000Wh, where the extra capacity does real work
- →Anyone backing up a defined set of circuits during an outage rather than an entire house
Buy the EP900 + 2×B500 if you…
- →Buyers running a whole-home backup with multiple large appliances — washer, dryer, AC, fridge — drawing simultaneously
- →Anyone building toward a large rooftop or ground-mount solar array who needs the 9,000W input ceiling to use it
- →Buyers who want the longest warranty runway and plan to keep the system installed for a decade or more
If neither fits
If your loads are small — charging devices, running a laptop, keeping a router alive — both of these are overkill and overpriced for the job. A single-battery portable station under $2,000 covers that use case without paying for capacity or output you'll never approach.
The Bottom Line
The Apex 300 + 2×B500K wins on the numbers that matter for most buyers: $5,690 for 13,004.8Wh, $0.13 per lifetime kWh, and enough headroom to clear every tested scenario except van-life-scale daily draw, where it still wins outright. The EP900 + 2×B500 costs $4,608 more for 3,084.8Wh less capacity, and its case rests entirely on 7,600W output and a 9,000W solar ceiling most buyers won't use.
Take the Apex 300 + 2×B500K unless you're specifically running whole-home loads or building toward a large solar array — in which case the EP900's inverter and solar ceiling are worth paying for, and the capacity gap is the honest price of admission.
Frequently Asked Questions
Answers drawn from the spec record and cited owner research.
Is the EP900 + 2×B500 worth nearly double the price of the Apex 300 + 2×B500K?
Only if you need its 7,600W continuous output or its 9,000W solar ceiling. It actually holds 3,084.8Wh less capacity than the Apex for $4,608 more, so buyers optimizing for stored energy per dollar get more from the Apex 300. The EP900's premium pays for inverter headroom and a longer warranty, not for more battery.
Can the Apex 300 + 2×B500K handle a full weekend of camping or an 8-hour blackout?
Yes, comfortably. The engine's Weekend Camping load of 2,100Wh uses only 19% of its capacity, and an 8-hour blackout at 1,645Wh uses 15%. Both scenarios leave most of the 13,004.8Wh untouched.
Why does the EP900 + 2×B500 score higher on the power score despite holding less capacity?
The composite score weights continuous output and solar input heavily, and the EP900 more than doubles the Apex's output (7,600W vs 3,840W) while nearly quadrupling its solar ceiling (9,000W vs 2,400W). Capacity is only one input among several, which is why the Apex can lead on raw watt-hours and lifetime cost while still scoring lower overall.
Are either of these units portable?
Not really, once assembled. The Apex 300 + 2×B500K weighs 282.2 lbs and the EP900 + 2×B500 weighs 343 lbs — both are two-person, plan-your-placement systems rather than something you carry to a campsite. Reviewers of the Apex 300 base unit specifically note they couldn't move it more than a few feet unassisted.
Does either unit's expansion path matter if I plan to add solar panels later?
It matters more for the EP900. Both units accept battery expansion, but the EP900's 9,000W solar input is nearly four times the Apex's 2,400W ceiling, so a bigger array actually has somewhere to send its output. If solar growth is part of your plan, that ceiling is the EP900's strongest argument.
Where to buy
BLUETTI Apex 300 + 2×B500KPick
$4,999.00
$4,999.00 list · direct from BLUETTI
BLUETTI EP900 + 2×B500
$10,298.00
$10,298.00 list · direct from BLUETTI
Prices may vary by retailer and are subject to change.