BLUETTI · Apex series
BLUETTI Apex 300 + B500K
The Apex 300 with a B500K is the larger one-battery stack: nearly eight kilowatt-hours at 183 pounds, which arrives on a pallet and stays there. Every scene we run clears, the van day on seven tenths; 10 of 22 head-to-heads, one of six against EcoFlow. No owner has written in; reviewers call the fans quiet and the firmware moody.
7.9 kWh · 3,840 W · 183 lb · 6,000 cycles · 22 head-to-heads
7,493
Power Score · The AC & Fridge Zone
- 7.9 kWh
- capacity
- 3,840 W
- output
- 183 lb
- weight
- 6,000
- rated cycles
Should you buy it right now?
Wait, or check the store first: $3,499 is 6% over its usual $3,299, and last time it came back within 7 days. The store shows $3,699; the discount comes off automatically and you pay $3,499.
Price now
$3,499
6% over usual · usual $3,299
Store sticker $3,699 · you pay $3,499
Real-world jobs
6 of 6
Clears every job on the board
Head-to-head record
10–10–2
22 adjudicated matchups
Verdicts by Gunner Gustafson and the Test Desk·Figures computed 2026-09-07
01 · Six real-world jobs
What the Apex 300 + B500K actually runs
The load profiles every comparison on the site is scored on, computed for this unit alone: energy needed against the usable tank after inverter losses, and whether the inverter holds and starts the biggest single load.
Weekend Camping
Clears it2 nights · Two nights off-grid with essential comfort
2,100Wh needed · 31% of the tank · 4,602Wh spare
Peak 75W: starts and holds
8-Hour Blackout
Clears it8 hours · Keep the essentials running through a night without power
1,645Wh needed · 25% of the tank · 5,057Wh spare
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 5% of the tank · 6,382Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 14% of the tank · 5,792Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 10% of the tank · 6,032Wh spare
Peak 400W: starts and holds
Van Life Daily
Clears it24 hours · A full day of mobile living — the ultimate endurance test
4,685Wh needed · 70% of the tank · 2,017Wh spare
Peak 150W: starts and holds
02 · Head-to-head record
10 wins in 22 written matchups
Every matchup is a full verdict scored on the six jobs above plus price, longevity and portability. This is the set shoppers search for, not a random sample.
Win share
10–10–2
- vs BLUETTI5–2
- vs EcoFlow1–5
- vs Anker1–1–2
- vs Goal Zero3–0
- vs Jackery0–2
winsApex 300 + B500K vs BLUETTI Apex 300 + B300K
57 searches reached this matchup
winsApex 300 + B500K vs BLUETTI EP900 + 2×B500
41 searches reached this matchup
winsApex 300 + B500K vs EcoFlow DELTA 3 Ultra Plus
35 searches reached this matchup
winsApex 300 + B500K vs BLUETTI Apex 300 + 2×B300K
34 searches reached this matchup
winsApex 300 + B500K vs Anker SOLIX F3800 PLUS
13 searches reached this matchup
losesApex 300 + B500K vs Anker SOLIX F3800
13 searches reached this matchup
03 · From the verdicts
Who it is for, and when a rival won instead
Each line is lifted from a written matchup where it decided the verdict, and links to the page it came from. Repeated across many matchups means it is the unit’s signature, not one author’s opinion.
Buy the Apex 300 + B500K if…
You want the lower price, more capacity, and a battery rated for seven times the cycle life.
Decided 12 matchups · read one →
Your daily draw is genuinely close to 4,685Wh — the one scenario where the smaller tank simply can't keep up regardless of how fast it recharges.
Decided 2 matchups · read one →
You already know you are growing. The bundle takes expansion batteries and the Elite does not, and retrofitting that decision means buying a whole second unit.
Decided 2 matchups · read one →
The van or off-grid buyer with a measured daily draw near 4,685Wh. Nothing smaller on this page finishes that day, and this one finishes it with 2,017Wh left over.
Decided 2 matchups · read one →
A rival won when…
You want the lowest entry price into the Apex 300 platform — $2,599 for 5,529.6Wh.
Decided 8 matchups · read one →
You want to buy it and forget it. The bigger installed base and US-based support make the DELTA the lower-drama ownership experience of the two.
Decided 3 matchups · read one →
You need to run something that draws hard and steady; the DPU's 7,200W continuous output is nearly double the Apex system's 3,840W.
Decided 3 matchups · read one →
You charge over USB or 12V and want it in a bag: phones, a laptop, a camera, a drone, a 12V cooler or fan, all fed from a 6.2-lb, 288Wh brick [A1][A3].
04 · Price history
What the Apex 300 + B500K actually sells for
The number on the buy button, read twice a day, one point per day. Never the sticker, never a “was” price.
Read from bluettipower.com twice a day since July 17 · 53 days
Since August 20 · above usual on 26 of 53 days · last time back within 7 days
Built from the Sep 7, 5 AM UTC read.
$3,299
Usual price
51% of days tracked
$3,299
Best we've seen
August 19
$3,499
Today
6% over usual
$3,899
Highest seen
26 days above usual
How to read this
- Usual is the price the unit carried most of the time, tested for how long it held rather than how often we looked. A weekend promotion cannot move it.
- Best is the lowest price we have read on the store itself. Typed coupon codes, member-only prices and marketplace listings are not counted; anything applied automatically at checkout is.
- A gap in the line is a day we could not read a price. We never draw across one, and we never show the store’s own “was” price.
Method on the methodology page.
Share the numbers
BLUETTI Apex 300 + B500K: usually $3,299, best $3,299 (Aug 19), today $3,499 on bluettipower.com. Tracked twice a day since Jul 17. https://stationarena.com/products/bluetti-apex-300-b500k#price-history
Alerts for the Apex 300 + B500K
One email when it drops below $3,299, comes back in stock, or a newer model in this line appears. Nothing else.
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05 · Voices
What owners and reviewers say
Owner reports are paraphrased from public YouTube comments and each links to its source; reviewer consensus is counted from cited excerpts, never quoted; our own verdicts are quoted. Specs on this page never come from any of them.
Reviewer consensus
5/13 positive excerpts, 0 sources
Multiple independent reviewers describe the dual-fan cooling as noticeably quiet/even for a unit of this output class, even under load.
· researched 2026-07-09
From the test desk
“Both are the identical Apex 300 base — 3,840W continuous, 7,680W surge, 3,500 cycles, 2,400W of solar, a 10ms switchover — with only the battery changing.”
“The Apex 300 + B500K holds 7,884.8Wh for $3,199; the EP900 + 2*B500 holds 9,920Wh for $10,298.”
“The Apex 300 + B500K wins on capability: it's the only one of these two that finishes a 4,685Wh Van Life Daily load without running dry, it costs less per watt-hour of capacity ($0.42 versus $0.49), and it carries a…”
06 · Where each number comes from
Spec sheet, in four cards
Every field carries its source: green is the manufacturer’s own document, blue was adjudicated after sources disagreed, grey is the catalogue as imported. Then compare it line by line with the units people actually weigh it against.
Battery
7884.8
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles6000+
- Battery Expansion FeasibilityYes
Power out
3840
Output (W)
- Surge Peak7680W
- AC Outlets6
- 240V Outlets1
- 30A RV Outlets1
- 12V Car Outlets0
- USB-C Ports2
- USB-A Ports2
- USB-C Charging Outputs100W
Charging
2400
Solar Input (W)
- Solar Input TypeMC4
Living with it
183
Weight (lbs)
- Noise Level (db)45
- UPSYes (<10ms)
- App ControlYes
- Warranty (Years)5
Compare it with
Apex 300 + B500K vs
leads on 1 · trails on 2
| Spec | Apex 300 + B500K | Apex 300 + B300K | Gap |
|---|---|---|---|
| Usual price | $3,299 | $2,599 ● | +$700 |
| Capacity (Wh) | 7884.8 ● | 5529.6 | +2355.2 |
| Output (W) | 3840 | 3840 | 0 |
| Surge (W) | 7680W | 7680W | 0 |
| Rated cycles | 6000+ | 6000+ | 0 |
| Solar input (W) | 2400 | 2400 | 0 |
| Weight (lb) | 183 | 148.8 ● | +34.2 |
| Noise (dB) | 45 | 45 | 0 |
| AC outlets | 6 | 6 | 0 |
| USB-C ports | 2 | 2 | 0 |
| Warranty (yr) | 5 | 5 | 0 |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (<10ms) | Yes (<10ms) |
● marks the better figure where direction is clear. Price is each unit’s usual price.
Read the full verdict →07 · BLUETTI Apex line
Where it sits in the line
Capacity bars are to scale across the line; prices are each unit’s usual price, not today’s.
Apex 300
2.8 kWh · $1,699
Apex 300 + B300K
5.5 kWh · $2,599
Apex 300 + B500K
7.9 kWh · $3,299
Apex 300 + 2×B300K
8.3 kWh · $3,699
Apex 300 + 2×B500K
13 kWh · $5,399
08 · At its usual price
Cost of ownership
Cycle life is the manufacturer’s rating to 80% capacity; the lifetime figure is that rating times the nameplate capacity.
$0.42
per Wh
at $3,299
$0.07
per lifetime kWh
47,309 kWh over 6,000 cycles
16.4 yr
if cycled daily
58 yr at weekends only
5 yr
warranty
$660 per covered year
09 · From the matchups
Questions people ask
Is the BLUETTI Apex 300 + B500K worth more than double the price of the EcoFlow DELTA 3 Ultra Plus?
Only if you'll use the extra capacity. The Apex 300 + B500K holds 7,884.8Wh against the DELTA 3 Ultra Plus's 3,072Wh and is the only one of the two that finishes a 4,685Wh van-life day without running dry. If your heaviest day looks more like camping or a blackout, you're paying $1,800 more for headroom both units already have.
Is the BLUETTI Apex 300 + B500K worth $799 more than the Anker SOLIX F3800 PLUS?
Yes, if you'll ever use the capacity. The $799 buys 4,045Wh, about twenty cents per watt-hour, against the $0.65 a watt-hour the Anker charges for its own 3,840Wh ($2,500 divided by 3,840Wh). The math only turns bad if your real ceiling sits well under 3,264Wh of usable energy, in which case you're paying for a second tank you never fill.
Should I get the Anker SOLIX F3800 or the BLUETTI Apex 300 + B500K for home backup?
The F3800 for most backup setups. An eight-hour outage on our model load uses half its usable 3,264Wh, and its 6,000W inverter starts bigger loads than the Apex's 3,840W. Choose the Apex if you're planning for multi-day outages without reliable sun, because 6,702Wh usable roughly doubles how long you last before the panels have to rescue you.
Is the Apex 300 + B500K worth double the price of the Elite 400?
Only if your heaviest day draws more than 3,264Wh, which is what the Elite 400 actually holds after the 85% inverter derate. Below that line you are paying $1,900 for reserve you never reach, and the two units cost the same 12 cents per lifetime kilowatt-hour, so there is no long-run rebate waiting. Above that line the bundle is not a luxury, it is the only one of the two that finishes the day.
How heavy is the Apex 300 + B500K, really?
183 lb, but that figure is the pair added together rather than one object. It is two boxes at roughly 92 lb each, so each half outweighs the whole 85 lb Elite 400. You will never lift 183 lb in one go; you will make two hard trips instead of one manageable one.
Some links are affiliate links; they never change the price you pay or which price we show. Owner reports are paraphrased from public comments and link to their source.