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BLUETTI Apex 300 Runtime Calculator

Quick answer: the BLUETTI Apex 300 stores 2,764.8 Wh and delivers up to 3,840 W of continuous AC power. Under this site's planning assumptions (85% inverter efficiency, 10% reserve), a steady 100 W AC load runs for roughly 21.2 hours. Last source check: 2026-08-21. This is an estimate, not a guarantee.

BLUETTI Apex 300 portable power station
Battery capacity2,764.8 Wh
AC output3,840 W
Surge outputunknown
Battery chemistryLiFePO4
ConfidenceEstimated
Source regionGlobal/general sources
checked2026-08-21
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BLUETTI Apex 300: Key facts
Battery capacity2,764.8 Wh
Battery chemistryLiFePO4
AC output3,840 W
Surge outputunknown
DC outputnot available
USB-C outputnot available
Solar input2,400 W
Weight38 kg
ConfidenceEstimated
Lifecycle statusUnknown
Source regionGlobal/general sources
Last verified2026-08-21
Catalog notes (original English)

Surge remains unknown because 7680W is published only as pure-resistive Power Lifting. The base Apex 300 has no built-in DC or USB-C load output in the checked manual; those ratings belong to the optional Hub D1 and are therefore excluded from this base-station record.

Runtime estimate

Formula starting points use each scenario’s default watts, duty cycle and output path, with 10% reserve or 15% for CPAP. Linked detail pages use the same inputs. Hours apply only if the device can run and start; they are not measured runtimes.

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Runtime estimate
Device scenarioPlanning defaultEstimated runtimeDevice scenario: ConfidenceModels
Full-size refrigerator500 W · 33% · AC inverter · Reserve: 10%12h 49m
Output or startup compatibility is not established		EstimatedCalculator
CPAP without heated humidifier40 W · 100% · AC inverter · Reserve: 15%2d 1h
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Starlink Mini32 W · 100% · USB-C PD · Reserve: 10%2d 23h
Exceeds a tracked power limit — do not rely on these hours		EstimatedCalculator
Wi-Fi router12 W · 100% · AC inverter · Reserve: 10%7d 14h
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
LED TV100 W · 100% · AC inverter · Reserve: 10%21h 9m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Adjust these assumptions in the runtime calculator

Runtime calculator

Runtime is conditional on successful startup, compatible voltage/connectors and sufficient output. Verify the actual device setup before relying on these hours.

Loading calculatorPreparing calculator
Power station model
Battery capacity (Wh): 2765 WhContinuous output rating (W): 3840 WSurge output rating (W): n/a
BLUETTI Apex 300
Estimated runtime1d 11h22h 4m – 1d 19hEstimated runtime: 1d 11h, 22h 4m – 1d 19h
Output path

Estimated runtime

Within the tracked power limits; compatibility still needs checking

This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior. Runtime is conditional on successful startup, compatible voltage/connectors and sufficient output. Verify the actual device setup before relying on these hours.

1d 11hEstimated runtime: 1d 11h

This setup has comfortable headroom for overnight use, assuming the wattage estimate is realistic.

Conservative22h 4m
Estimated1d 11h
Optimistic1d 19h

These are calculated sensitivity cases, not a statistical confidence interval. Conservative uses lower efficiency and battery health, more reserve/temperature loss and higher load; optimistic changes these assumptions in the opposite direction.

  • This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior. Runtime is conditional on successful startup, compatible voltage/connectors and sufficient output. Verify the actual device setup before relying on these hours.
  • Within the tracked power limits; compatibility still needs checking

Show your work

Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.

Rated battery
2765 Wh
Usable energy
2115 Wh
2765 Wh x 85% x 90% x 100% x 100%
Running watts
60 W
Average load
60 W
Max surge
n/a
Fixed station overhead
Unknown (not included)
60 W / 85% = 70.6 W battery draw; fixed overhead is unknown and excluded
Estimated runtime
1d 11h
2115 Wh / 60 W = 1d 11h
Output path
AC inverter
Efficiency (%)
85
Reserve kept unused (%)
10
Battery health (%)
100
Cold weather loss (%)
0

This link contains the numeric values you entered, but not custom load names.

Source-Backed Next Steps

WattRunTime.com

WattRunTime estimate

Estimated runtime

1d 11hThis setup has comfortable headroom for overnight use, assuming the wattage estimate is realistic.
Usable energy2115 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a

Runtime range

Conservative22h 4m
Estimated1d 11h
Optimistic1d 19h

Show your work

Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.

Usable energy2115 Wh2765 Wh x 85% x 90% x 100% x 100%
Fixed station overheadUnknown (not included)60 W / 85% = 70.6 W battery draw; fixed overhead is unknown and excluded
Estimated runtime1d 11h2115 Wh / 60 W = 1d 11h

Assumptions

  • 2765 Wh nominal battery capacity
  • AC inverter output path
  • 85% conversion efficiency
  • 10% reserve kept unused
  • 60 W average load from 1 load
  • 100% battery health
  • 0% temperature loss
  • Fixed station overhead unknown; not included

Warnings

  • This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior. Runtime is conditional on successful startup, compatible voltage/connectors and sufficient output. Verify the actual device setup before relying on these hours.
  • Within the tracked power limits; compatibility still needs checking

Planning notes

  • Capacity class: 2,764.8 Wh. Size the battery for your measured average load and required hours, including reserve.
  • Tracked output: 3,840 W. Compare both running demand and startup demand before using any runtime estimate.
  • Solar input limit: 2,400 W. Actual refill depends on panel voltage/current compatibility, sunlight, angle and charging losses.

Known data gaps

  • Unverified or missing specifications remain visible. The confidence label describes the station record, not a tested runtime or approval for emergency use.
  • Weight: 38 kg. Check the complete carrying setup, cables and battery extensions before choosing this model for travel.
  • unknown: Surge output

Models: BLUETTI

Compare nearby capacity records from the same brand, then check output, weight and missing fields. A larger battery does not establish device compatibility.

Sources