BLUETTI · AC series
BLUETTI AC300 + 4×B300
The AC300 with four B300s is the top rung of BLUETTI’s twelve-rung AC ladder: twelve kilowatt-hours at 367 pounds behind a three-kilowatt head unit, every scene we run cleared. The head unit is the part that fails, reviewers warn, and once BLUETTI discontinues one there are no parts, and four batteries become ballast. Two head-to-heads, split; no owner reports.
12.3 kWh · 3,000 W · 367.2 lb · 3,500 cycles · 2 head-to-heads
8,760
Power Score · The AC & Fridge Zone
- 12.3 kWh
- capacity
- 3,000 W
- output
- 367.2 lb
- weight
- 3,500
- rated cycles
Should you buy it right now?
Fair price today: $5,596 is what it normally sells for. It clears 6 of 6 real-world jobs and wins 1 of 2 matchups.
Verdicts by Gunner Gustafson and the Test Desk·Figures computed 2026-09-07
01 · Six real-world jobs
What the AC300 + 4×B300 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 · 20% of the tank · 8,345Wh spare
Peak 75W: starts and holds
8-Hour Blackout
Clears it8 hours · Keep the essentials running through a night without power
1,645Wh needed · 16% of the tank · 8,800Wh spare
Peak 150W: starts and holds
CPAP Overnight
Clears it8 hours · Sleep therapy without interruption — the #1 medical use case
320Wh needed · 3% of the tank · 10,125Wh spare
Peak 40W: starts and holds
Remote Workday
Clears it8 hours · Full work day off-grid without power anxiety
910Wh needed · 9% of the tank · 9,535Wh spare
Peak 60W: starts and holds
Tailgate Party
Clears it4 hours · Game day power for the crew
670Wh needed · 6% of the tank · 9,775Wh 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 · 45% of the tank · 5,760Wh spare
Peak 150W: starts and holds
02 · Head-to-head record
1 wins in 2 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
1–1
- vs BLUETTI1–1
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 AC300 + 4×B300 if…
The long-outage, off-grid, or van-life buyer who wants the most stored energy per dollar: 12,288Wh at $0.13 a lifetime kilowatt-hour, more than double the AC500 stack's reserve for 42% more money.
The homeowner arming a multi-day backup who would rather wake to 8,800Wh still in the tank after an eight-hour outage than to a stronger inverter they never load past 3,000W.
Anyone whose heaviest single load stays under 3,000W and who is comfortable buying the current-warranty life of a platform that is now end-of-life [A10].
You already own AC300 gear, a head unit or a couple of B300 batteries, and want to grow the system you've got. Staying in-platform means expanding what you already live with rather than buying into the discontinuation fresh.
A rival won when…
Anyone with a single load over 3,000W: an electric range element, a large well pump, a welder, or several heavy 120V loads at once. The 5,000W inverter with 10,000W of surge is the only thing here that starts them.
The buyer whose needs fit inside 5,530Wh and who wants BLUETTI's current, still-serviceable platform and the lower $3,948 sticker over the discontinued AC300 [A10].
Whoever will actually reposition it or lean on solar daily: at 196 lbs it's 171 lighter than the AC300 stack and takes 3,000W of panels to the AC300 stack's 2,400W.
You're buying fresh at this tier for home or big-rig backup and want the unit BLUETTI is still supporting, with the longer warranty and the lighter, denser pack.
04 · Price history
What the AC300 + 4×B300 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 18 · 52 days
Carried on 100% of days tracked · dips reach $5,596
Built from the Sep 7, 5 AM UTC read.
$5,596
Usual price
100% of days tracked
$5,596
Best we've seen
September 7
$5,596
Today
at usual
$5,596
Highest seen
0 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 AC300 + 4×B300: usually $5,596, best $5,596 (Sep 7), today $5,596 on bluettipower.com. Tracked twice a day since Jul 18. https://stationarena.com/products/bluetti-ac300-4-b300#price-history
Alerts for the AC300 + 4×B300
One email when it drops below $5,596, 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
5/12 positive excerpts, 1 sources
Idle power draw is noticeably higher than expected and drains meaningful battery even with no connected load.
reviewed.com · researched 2026-07-17
From the test desk
“Buy the AC300 + 4×B300 for the job most people buy this class to do: store energy.”
“Take the Apex 300 stack.”
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
12288
Capacity (Wh)
- ChemistryLiFePO4
- Charging Cycles3500
- Battery Expansion FeasibilityYes
Power out
3000
Output (W)
- Surge Peak6000W
- AC Outlets7
- 240V Outlets0
- 30A RV Outlets0
- 12V Car Outlets1
- USB-C Ports2
- USB-A Ports2
- USB-C Charging Outputs100W
Charging
2400
Solar Input (W)
- Solar Input TypeMPPT (12-150V, 2x1200W)
Living with it
367.2
Weight (lbs)
- Noise Level (db)Not Specified
- UPSYes (20ms)
- App ControlYes
- Warranty (Years)4
Compare it with
AC300 + 4×B300 vs
leads on 1 · trails on 5
| Spec | AC300 + 4×B300 | AC500 + 2×B300K | Gap |
|---|---|---|---|
| Usual price | $5,596 | $3,948 ● | +$1,648 |
| Capacity (Wh) | 12288 ● | 5530 | +6758 |
| Output (W) | 3000 | 5000 ● | -2000 |
| Surge (W) | 6000W | 10000W ● | -4000 |
| Rated cycles | 3500 | 3500 | 0 |
| Solar input (W) | 2400 | 3000 ● | -600 |
| Weight (lb) | 367.2 | 196.1 ● | +171.1 |
| Noise (dB) | Not Specified | Not Specified | |
| AC outlets | 7 | Not Specified | |
| USB-C ports | 2 | 2 | 0 |
| Warranty (yr) | 4 | Not Specified | |
| Chemistry | LiFePO4 | LiFePO4 | |
| UPS | Yes (20ms) | Yes (20ms) |
● marks the better figure where direction is clear. Price is each unit’s usual price.
Read the full verdict →07 · BLUETTI AC 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.
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.
$0.46
per Wh
at $5,596
$0.13
per lifetime kWh
43,008 kWh over 3,500 cycles
9.6 yr
if cycled daily
34 yr at weekends only
4 yr
warranty
$1,399 per covered year