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Xtorm Xtreme Power 2 Smart 300W Runtime Calculator

Quick answer: the Xtorm Xtreme Power 2 Smart 300W stores 204 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 1.6 hours. Last source check: 2026-08-27. This is an estimate, not a guarantee.

Battery capacity204 Wh
AC output300 W
Surge output500 W
Battery chemistryLiFePO4
ConfidenceEstimated
Source regionRegional source
checked2026-08-27
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Xtorm Xtreme Power 2 Smart 300W: Key facts
Battery capacity204 Wh
Battery chemistryLiFePO4
AC output300 W
Surge output500 W
DC output100 W
USB-C output65 W
Solar inputunknown
Weight3.65 kg
ConfidenceEstimated
Lifecycle statusUnknown
Source regionRegional source
Last verified2026-08-27
Catalog notes (original English)

Xtorm quotes no maximum solar input for the 300W model, so solar input stays unknown even though the unit accepts Xtorm panels through a DC7909 to MC4 adapter. Xtorm is a Netherlands-based brand and publishes these figures on its European xtorm.eu storefront, so the AC ratings describe the 230V EU-market SKU rather than a 120V variant.

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. xtorm.eu: Xtorm official Smart Power Station 300W 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%57m
Exceeds a tracked power limit — do not rely on these hours		EstimatedCalculator
CPAP without heated humidifier40 W · 100% · AC inverter · Reserve: 15%3h 41m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
Starlink Mini32 W · 100% · USB-C PD · Reserve: 10%5h 17m
Exceeds a tracked power limit — do not rely on these hours		EstimatedCalculator
Wi-Fi router12 W · 100% · AC inverter · Reserve: 10%13h 28m
Within the tracked power limits; compatibility still needs checking		EstimatedCalculator
LED TV100 W · 100% · AC inverter · Reserve: 10%1h 34m
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): 204 WhContinuous output rating (W): 300 WSurge output rating (W): 500 W
Xtorm Xtreme Power 2 Smart 300W
Estimated runtime2h 36m1h 38m – 3h 14mEstimated runtime: 2h 36m, 1h 38m – 3h 14m
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.

2h 36mEstimated runtime: 2h 36m

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

Conservative1h 38m
Estimated2h 36m
Optimistic3h 14m

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
204 Wh
Usable energy
156 Wh
204 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
2h 36m
156 Wh / 60 W = 2h 36m
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

2h 36mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.
Usable energy156 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a

Runtime range

Conservative1h 38m
Estimated2h 36m
Optimistic3h 14m

Show your work

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

Usable energy156 Wh204 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 runtime2h 36m156 Wh / 60 W = 2h 36m

Assumptions

  • 204 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: 204 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: unknown. 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: 3.65 kg. Check the complete carrying setup, cables and battery extensions before choosing this model for travel.
  • unknown: Solar input

Models: Xtorm

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

Sources