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BLUETTI AC500 + B300S Runtime Calculator

Quick answer: the BLUETTI AC500 + B300S stores 3,072 Wh and delivers up to 4,500 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 23.5 hours. Last source check: 2026-10-25. This is an estimate, not a guarantee.

BLUETTI AC500 + B300S portable power station
Battery capacity3,072 Wh
AC output4,500 W
Surge outputunknown
Battery chemistryLiFePO4
ConfidenceEstimated
Source regionMixed regional sources
checked2026-10-25
BLUETTI AC500 + B300S: Key facts
Battery capacity3,072 Wh
Battery chemistryLiFePO4
AC output4,500 W
Surge outputunknown
DC outputunknown
USB-C output100 W
Solar input3,000 W
Weight68 kg
ConfidenceEstimated
Lifecycle statusUnknown
Source regionMixed regional sources
Last verified2026-10-25
Catalog notes (original English)

US 100-120 V AC500 with exactly one B300S:3072 Wh and 4500 W maximum AC, as explicitly limited on manual pages 11 and 18.5000 W requires batteries on both expansion ports; the inverter's general10000 W surge is not independently established for this one-pack configuration, so kit surge remains unknown. DC watts remain unknown:12 V/30 A RV and 24 V/10 A car profiles are published, while418 W is only a2-second overload rating. The68 kg transport value is the separately transported 30 kg AC500 inverter plus one 38 kg B300S battery. Solar 3000 W is the controller's PV ceiling, not a guarantee of actual recharge speed. Regional storefront/component lifecycle labels do not establish lifecycle status for the complete system.

Regional source note Some specs are cross-checked against official regional pages. Regional SKUs can differ; verify the manufacturer page for your market before purchase or emergency planning. s4.bluettipower.com: BLUETTI AC500 US manual and one-B300S output limit, bluettipower.ph: BLUETTI AC500 + B300S PH specification table, bluettipower.ph: BLUETTI B300S expansion battery product page, support.bluettipower.com: BLUETTI AC500 US support and manual index

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.

Swipe table sideways
Runtime estimate
Device scenarioPlanning defaultEstimated runtimeDevice scenario: ConfidenceModels
Full-size refrigerator500 W · 33% · AC inverter · Reserve: 10%14h 15m
Output or startup compatibility is not established		EstimatedCalculator
CPAP without heated humidifier40 W · 100% · AC inverter · Reserve: 15%2d 7h
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Starlink Mini32 W · 100% · USB-C PD · Reserve: 10%3d 7h
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Wi-Fi router12 W · 100% · AC inverter · Reserve: 10%8d 10h
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
LED TV100 W · 100% · AC inverter · Reserve: 10%23h 30m
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): 3072 WhAC inverter: 4500 WSurge output rating (W): unknown
BLUETTI AC500 + B300S
Estimated runtime1d 15h1d 0h – 2d 0h

Within the tracked power limits; compatibility still needs checking

Estimated runtime: 1d 15h. 1d 0h – 2d 0h. Within the tracked power limits; compatibility still needs checking
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 15hEstimated runtime: 1d 15h. 1d 0h – 2d 0h. Within the tracked power limits; compatibility still needs checking

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

Conservative1d 0h
Estimated1d 15h
Optimistic2d 0h

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
3072 Wh
Usable energy
2350 Wh
3072 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 15h
2350 Wh / 60 W = 1d 15h
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.

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WattRunTime.com

WattRunTime estimate

Estimated runtime

1d 15hThis setup has comfortable headroom for overnight use, assuming the wattage estimate is realistic.
Usable energy2350 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a

Runtime range

Conservative1d 0h
Estimated1d 15h
Optimistic2d 0h

Show your work

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

Usable energy2350 Wh3072 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 15h2350 Wh / 60 W = 1d 15h

Assumptions

  • 3072 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: 3,072 Wh. Size the battery for your measured average load and required hours, including reserve.
  • Tracked output: 4,500 W. Compare both running demand and startup demand before using any runtime estimate.
  • Solar input limit: 3,000 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: 68 kg. Check the complete carrying setup, cables and battery extensions before choosing this model for travel.
  • unknown: Surge output, DC 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