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iTechworld PS300 Runtime Calculator

Quick answer: the iTechworld PS300 stores 276 Wh and delivers up to 300 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 2.1 hours. Last source check: 2026-08-27. This is an estimate, not a guarantee.

iTechworld PS300 portable power station
Battery capacity276 Wh
AC output300 W
Surge outputunknown
Battery chemistryLiFePO4
ConfidenceEstimated
Source regionRegional source
checked2026-08-27
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iTechworld PS300: Key facts
Battery capacity276 Wh
Battery chemistryLiFePO4
AC output300 W
Surge outputunknown
DC outputunknown
USB-C output100 W
Solar input80 W
Weight3.4 kg
ConfidenceEstimated
Lifecycle statusUnknown
Source regionRegional source
Last verified2026-08-27
Catalog notes (original English)

Surge stays unknown because the page publishes no peak AC figure, and DC stays unknown because the 12V/8A profile carries no watt limit. iTechworld is an Australian brand and this record follows its published 240V configuration.

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. itechworld.com.au: iTechworld PS300 official Australian product page

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%1h 17m
Exceeds a tracked power limit — do not rely on these hours		EstimatedCalculator
CPAP without heated humidifier40 W · 100% · AC inverter · Reserve: 15%4h 59m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Starlink Mini32 W · 100% · USB-C PD · Reserve: 10%7h 8m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Wi-Fi router12 W · 100% · AC inverter · Reserve: 10%18h 13m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
LED TV100 W · 100% · AC inverter · Reserve: 10%2h 7m
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): 276 WhContinuous output rating (W): 300 WSurge output rating (W): n/a
iTechworld PS300
Estimated runtime3h 31m2h 12m – 4h 22mEstimated runtime: 3h 31m, 2h 12m – 4h 22m
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.

3h 31mEstimated runtime: 3h 31m

This setup is tight. Reduce load, use DC where possible, or choose a larger station.

Conservative2h 12m
Estimated3h 31m
Optimistic4h 22m

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
276 Wh
Usable energy
211 Wh
276 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
3h 31m
211 Wh / 60 W = 3h 31m
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

3h 31mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.
Usable energy211 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a

Runtime range

Conservative2h 12m
Estimated3h 31m
Optimistic4h 22m

Show your work

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

Usable energy211 Wh276 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 runtime3h 31m211 Wh / 60 W = 3h 31m

Assumptions

  • 276 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: 276 Wh. Size the battery for your measured average load and required hours, including reserve.
  • Tracked output: 300 W. Compare both running demand and startup demand before using any runtime estimate.
  • Solar input limit: 80 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: 3.4 kg. Check the complete carrying setup, cables and battery extensions before choosing this model for travel.
  • unknown: Surge output, DC output

Models: iTechworld

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

Sources