Specifications checked against manufacturer pages on 2026-08-23.
The Bluetti Apex 300 is a 2,764.8 Wh portable power station in the large bracket, with a 3,840 W continuous inverter and LiFePO4 cells. This page transcribes the manufacturer’s specifications as they stood on 2026-08-23, turns the capacity into appliance hours, and names the rows Bluetti does not fill in. Quoted figures carry a source; calculated ones carry a formula.
In short. 2,764.8 Wh in the large band: $0.61/Wh at the list price we recorded; 33.0 Wh per pound; 6,000 rated cycles to 80%. On our assumptions a full-size refrigerator calculates to 37–43 hr, and a 40 W CPAP calculates to 2.0–2.4 days. We could not fill 1 row from Bluetti’s page. It is listed below, not guessed. A 7,680 W boost figure is published, but it is rated for resistive loads, so we do not read it as motor-start headroom. Hours are calculated from rated capacity, never measured.
Check the current price
The link goes to the exact base unit whose specifications are on this page, not a bundle. Amazon prices change daily.
Who it is for, and who should skip it
Two lists, both drawn from the table further down.
It fits if
- A refrigerator is what you are saving. It clears a 12-hour outage on our assumptions with about 25 hours to spare.
Skip it if
- A hard-starting motor is the point. Bluetti publishes no motor-start surge rating here, so published figures cannot confirm it spins up a pump or a compressor with an unusual inrush.
Every published specification
Each footnote below points at the sentence a figure came from. Two phrases matter: “Manufacturer does not state” means the maker is silent, “Not yet verified by CalmWatt” means we are.
| Specification | Bluetti Apex 300 |
|---|---|
| Rated capacity | 2,764.8 Wh1 |
| Usable capacity (calculated)* | 2350–2488 Wh |
| Continuous AC output | 3,840 W2 |
| Surge output | No conventional surge stated (7,680 W boost mode)3 |
| Full recharge from wall | 65 min4 |
| Cell chemistry | LiFePO45 |
| Rated cycle life | 6,000+ cycles to 80%6,7 |
| UPS switchover | 0 ms (conditional — see notes)8 |
| Expandable | Yes — 58,061 Wh only as a multi-unit system; no single-unit maximum stated9,10 |
| Max solar input | 2,400 W11 |
| Max AC charging input | 3,840 W12 |
| AC outlets | 613 |
| Highest USB-C port | 100 W (via optional hub)14 |
| App control | Yes15 |
| Stated noise | Manufacturer does not state |
| Warranty | 5 years16 |
| Weight | 83.78 lb17 |
| Manufacturer list price when checked | $1,69918 |
* Our calculation, not a published figure: rated capacity × an assumed 85–90% conversion efficiency.
Notes on the figures
- Apex 300, rated capacity: Tech Specs > OUTPUT row for the Apex 300 block. The hero also states ‘2,764.8Wh Capacity’.
- Apex 300, continuous output: Tech Specs > OUTPUT. Hero also shows ‘3,840W Output’. Continuous AC output; 120V/240V dual voltage.
- Apex 300, surge: This is BLUETTI’s ‘Lifting Power’ (Power Lifting mode for resistive loads), not a conventional surge rating. A bundle description on the same page says ‘3.8kW continuous output, capable of driving up to 7680W pure resistive load’; a caption on one image calls it ‘7,680W surge power’. It is not a conventional motor-start surge rating and should not be read as one.
- Apex 300, full recharge: Full (0-100%) time applies to Turbo Charging mode (3,840W Max.). The Tech Specs INPUT row only states ‘Turbo Charging 3,840W Max. (80% in 45 mins @ 59°F to 77°F /15°C to 25°C)’. Standard AC mode is ‘up to 1,440W’ (FAQ Q11) with no full-charge time stated; the ‘ AC Input’ row reads ‘120V, 50/60Hz, 15A Max. 1,800W Max. with bypass’.
- Apex 300, cell chemistry: Tech Specs > BATTERY INFO. Marketing copy: ‘2nd-gen automotive-grade LiFePO₄ battery built to last 17 years’.
- Apex 300, cycle life: Stated as ‘6,000+’, a lower bound rather than an exact count.
- Apex 300, cycle life: Cycle Life 6,000+ cycles to 80% original capacity
- Apex 300, UPS switchover: Conditional: a footnote on the page reads ‘0ms UPS* keeps work online instantly. … *Connect to grid power with the 15A AC charging cable, set output to 240V, and plug essential devices into the left two AC outlets.’ Elsewhere: ‘Fast 0ms or 20ms switching keeps sensitive devices like CPAP machines running smoothly.’ So 0 ms applies only in that configuration; otherwise 20 ms. Not in the Tech Specs table.
- Apex 300, expandable: Tech Specs > GENERAL. Compatible expansion batteries per the page: B300K, B300S, B300, B500K.
- Apex 300, expandable: FAQ answer for a 3-unit parallel system via Hub A1 (also ‘Max AC output: 11,520W (3 units)’). Marketing: ‘Super scalable: 2,764.8Wh to 58kWh capacity’. A single Apex 300 supports up to 6 batteries per unit, but no verbatim single-unit maximum Wh is stated on the page.
- Apex 300, solar input: Two built-in XT60 solar inputs totaling 2,400W (FAQ: ‘Each input port supports up to 1,200W (12V-60V*, 20A Max.), totaling 2,400W.’). With the optional SolarX 4K accessory the page claims ‘up to 4,000W solar input* (* Requires a SolarX 4K.)’ and ‘a maximum solar input of 6,400W’ combined; SolarX 4K also requires at least one B300K.
- Apex 300, AC input: Maximum AC charging rate in Turbo mode (FAQ Q11: ‘Turbo (up to 3,840W)’; ‘Standard (up to 1,440W)’). The separate ‘ AC Input’ spec row reads ‘120V, 50/60Hz, 15A Max. 1,800W Max. with bypass’ for the 15A cable. ‘Maximum Input’ row: ‘Apex 300: 3,840W Max. Apex 300+1~6 B300K: 6,240W Max.’
- Apex 300, AC outlets: Count derived from the row: 4 x 20A household outlets + 1 x NEMA TT-30R + 1 x NEMA 14-50R = 6 AC receptacles.
- Apex 300, USB-C: The Apex 300 itself has no USB-C ports; the 2 x 100W USB-C ports require the optional Hub D1 accessory.
- Apex 300, app: Tech Specs > GENERAL. BLUETTI app features listed: remote on/off, monitoring, mode switching, OTA updates, multi-device management, Extreme Weather Alerts.
- Apex 300, warranty: Tech Specs > GENERAL for the Apex 300 block (expansion batteries on the same page carry different terms, e.g. B500K ‘4 Years’).
- Apex 300, weight: Tech Specs > GENERAL for the Apex 300 block (the label carries a stray leading space on the page). Other weights on the page (45kg/99.21lbs, 1.59kg/3.51lbs) belong to B500K and Charger 2 and were ignored.
- Apex 300, price: Price shown in the ‘Select Options’ picker for the single-unit ‘Apex 300’ option (the currency symbol and the number are rendered separately on the page).
What Bluetti does not state
A specification sheet is as informative in what it omits as in what it lists. Every gap on this unit’s page, named rather than quietly filled in. That places it with the 29 of 34 transcribed units that leave a gap; this one leaves 1 figure.
- Operating noise. Absent from Bluetti’s specifications for this unit when we checked.
- A motor-start surge rating. The 7,680 W figure Bluetti publishes is a boost mode for resistive loads, so it does not answer whether a compressor starts. We do not treat it as if it did.
- Usable capacity. No maker in our database publishes one. Rated capacity is the cells; what reaches the outlet is less, and the gap moves with the load.
None of this makes the unit worse than its rivals; most makers omit most of these. It does mean any page quoting a confident number for one of them is quoting an estimate.
What it runs, and for how long
Same appliances and assumptions we use on every comparison page, so these rows read against any other unit on this site.
| Appliance | Apex 300 |
|---|---|
| Full-size refrigerator 150 W, 900 W start, 35% duty · eff. 70%–82% |
37–43 hr |
| Mini fridge 70 W, 400 W start, 30% duty · eff. 70%–82% |
3.8–4.5 days |
| CPAP without humidifier 40 W · eff. 70%–82% |
2.0–2.4 days |
| CPAP with heated humidifier 95 W · eff. 70%–82% |
20–24 hr |
| Gas furnace blower 400 W, 1600 W start, 40% duty · eff. 80%–87% |
14–15 hr |
| 1/3 hp sump pump 500 W, 1800 W start, 15% duty · eff. 80%–87% |
29–32 hr |
| Router and modem 20 W · eff. 70%–82% |
4.0–4.7 days |
| Laptop 60 W · eff. 70%–82% |
32–38 hr |
| 1500W space heater 1500 W · eff. 85%–90% |
1.6–1.7 hr |
Arithmetic, not a measurement: hours = rated Wh × efficiency ÷ (appliance W × duty). Appliance and efficiency assumptions live on How we verify. A row reading “Unlikely to start” failed the surge check, not the capacity one.
The same specs, normalized
| Measure | Apex 300 |
|---|---|
| Cost per watt-hour | $0.61/Wh |
| Watt-hours per pound | 33.0 Wh/lb |
| Surge headroom | Not applicable — the stated figure is a boost-mode rating, not a motor-start surge. |
| Recharge rate | 42.5 Wh/min |
| Rated cycle life | 6,000 cycles to 80% |
| Continuous watts per dollar | 2.26 W/$ |
Ratios have no winner here — there is no second column. Each one is defined, with its direction, on How we verify.
What those figures actually mean
Cost per watt-hour: $0.61/Wh. The $1,699 list price we recorded over 2,765 Wh of rated capacity. This is the number to carry between listings; a discount changes it in proportion, so ours is only true for the day we recorded it.
Watt-hours per pound: 33.0 Wh/lb. 2,765 Wh in 83.78 lb makes this a cart-or-two-people unit. Density is what lithium iron phosphate gives up to older chemistries; the cycle rating is what it buys in return.
Surge headroom: not applicable. Bluetti’s boost figure is rated for resistive loads, so dividing it by the continuous rating would describe a heater, not a compressor. We leave the row empty.
Recharge rate: 42.5 Wh/min. A full wall charge in 65 minutes. In a multi-day outage this is generator fuel measured in minutes.
Rated cycle life: 6,000 cycles to 80% capacity. Cycled weekly it would take about 115 years to get there, so for a few outages a year the cell count is not the limit. For daily off-grid use it is. The percentage matters as much as the count: two ratings only compare when they name the same remaining capacity.
Continuous watts per dollar: 2.26 W/$. Output for the money rather than storage for the money. Which of the two you should read depends on whether your outage is a big load or a long one.
Where it sits in our database
The obvious missing question on a one-unit page is whether these numbers are good. Here is where each lands among the units we have verified.
| Measure | Apex 300 | Among verified units |
|---|---|---|
| Rated capacity | 2,764.8 Wh | 6th largest of 34 |
| Continuous AC output | 3,840 W | 3rd highest of 34 |
| Cost per watt-hour | $0.61/Wh | 16th cheapest of 32 |
| Watt-hours per pound | 33.0 Wh/lb | 26th densest of 34 |
| Weight | 83.78 lb | 31st lightest of 34 |
A low rank on weight is a high rank on portability. Nothing in this table is a verdict. The row built on price uses the manufacturer list price recorded on 2026-08-23; the retail price behind our link moves independently, so recompute that row against what you are shown.
Three outages, and the figure that decides each
- One night, one CPAP. A 40 W CPAP without a humidifier calculates to 2.0–2.4 days. The stated 0 ms handover — conditional on the maker’s configuration — is what decides whether the machine notices the outage.
- Twelve hours, one refrigerator. A typical full-size refrigerator calculates to 37–43 hr.
- The loads people forget. A gas furnace blower calculates to 14–15 hr and a one-third horsepower sump pump calculates to 29–32 hr. Neither is a cord-and-plug load in a typical house, whatever these hours say. A router and modem, meanwhile, calculates to 4.0–4.7 days.
- Three days, with something to recharge from. A full wall recharge takes 65 minutes, and it accepts up to 2,400 W of solar, so day two turns on your panels and your sky.
The Apex 300 against other units
2 pages on this site compare the Apex 300 directly with another unit, using the table above on both sides.
Questions people ask about the Apex 300
Answers use only the figures on this page.
How long will the Apex 300 run a refrigerator?
37–43 hr on our assumptions for a typical full-size unit at 150 W running and a 35% duty cycle. Start-up is the check that comes before hours. Your own compliance label is the number that matters.
Can the Apex 300 run a CPAP all night?
Yes on capacity: a 40 W machine without a humidifier calculates to 2.0–2.4 days against the eight hours a night usually needs. The maker states 0 ms on the handover, but only in the configuration it describes. A heated humidifier roughly doubles the draw.
How long does the Apex 300 take to recharge?
65 minutes from a wall outlet on the maker’s figure, with up to 2,400 W accepted from solar. In a long outage that sets how long a generator runs per refill.
How much does the Apex 300 weigh?
83.78 lb on the maker’s figure, or 33.0 Wh of rated capacity carried per pound. That is a cart-or-two-people unit, which is why units this size tend to stay where you put them.
How many cycles is the Apex 300 rated for?
6,000 cycles to 80% of original capacity, on LiFePO4 cells, which is roughly 115 years at one cycle a week. Compare it only with ratings quoted to the same remaining capacity.
Can you expand the Apex 300’s capacity?
Yes, with extra batteries, but the 58,061 Wh the maker quotes is a multi-unit system figure rather than one unit’s ceiling, and the page states no single-unit maximum. Treat the headline as the top of a product family, not of this box.
Check the current price
The link goes to the exact base unit whose specifications are on this page, not a bundle. Amazon prices change daily.
Related reading
Against a gasoline generator this loses on endurance — a 1,500 W space heater empties it in 1.6–1.7 hr — and wins on the one thing that kills people every winter. Our CPSC revision matrix tracks how the official count of generator carbon-monoxide deaths has changed across report editions, and this page puts every verified unit, including this one, on one refrigerator scenario.
Ordering before a storm? Check the arrival date at checkout — a unit that ships tomorrow can beat a better one that ships next week. Amazon Prime includes fast delivery on eligible items and starts with a free trial; we earn a commission if you join.
Sources and method
- Bluetti Apex 300: manufacturer product page, checked 2026-08-23.
We compared published specs and copied each figure from the manufacturer’s page. Runtimes are our arithmetic, not a measurement, and the formula is on the page so you can substitute your own load. Method: How we verify. More: Comparisons.