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MARBERO M138 Runtime Calculator
Quick answer: the MARBERO M138 stores 88.8 Wh. Its continuous AC rating is not confirmed by a usable source, so this record keeps the field unknown rather than guessing — check the sources below before planning AC loads. Last source check: 2026-08-26. This is an estimate, not a guarantee.
Battery capacity88.8 Wh
AC outputunknown
Surge outputunknown
Battery chemistryunknown
ConfidenceEstimated
Source regionGlobal/general sources
checked2026-08-26
Swipe table sideways
| Battery capacity | 88.8 Wh |
|---|---|
| Battery chemistry | unknown |
| AC output | unknown |
| Surge output | unknown |
| DC output | unknown |
| USB-C output | 30 W |
| Solar input | unknown |
| Weight | unknown |
| Confidence | Estimated |
| Lifecycle status | Unknown |
| Source region | Global/general sources |
| Last verified | 2026-08-26 |
Catalog notes (original English)
The legacy product handle says 240Wh, but the current title, variant, and page specification identify M138 as 88.8Wh; AC output is withheld because the outlet wording is ambiguous.
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
| Device scenario | Planning default | Estimated runtime | Device scenario: Confidence | Models |
|---|---|---|---|---|
| Full-size refrigerator | 500 W · 33% · AC inverter · Reserve: 10% | 25m Output or startup compatibility is not established | Estimated | Calculator |
| CPAP without heated humidifier | 40 W · 100% · AC inverter · Reserve: 15% | 1h 36m Output or startup compatibility is not established | Estimated | Calculator |
| Starlink Mini | 32 W · 100% · USB-C PD · Reserve: 10% | 2h 18m Exceeds a tracked power limit — do not rely on these hours | Estimated | Calculator |
| Wi-Fi router | 12 W · 100% · AC inverter · Reserve: 10% | 5h 52m Output or startup compatibility is not established | Estimated | Calculator |
| LED TV | 100 W · 100% · AC inverter · Reserve: 10% | 41m Output or startup compatibility is not established | Estimated | 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.
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Power station model
Battery capacity (Wh): 89 WhContinuous output rating (W): n/aSurge output rating (W): n/a
Estimated runtime1h 8m43m – 1h 25mEstimated runtime: 1h 8m, 43m – 1h 25m
Output path
Estimated runtime
Output or startup compatibility is not established
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.
1h 8mEstimated runtime: 1h 8mOutput or startup compatibility is not established
Conservative43m
Estimated1h 8m
Optimistic1h 25m
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.
- Output or startup compatibility is not established
- The selected station output rating is unknown, so running-load compatibility is not verified.
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
- Rated battery
- 89 Wh
- Usable energy
- 68 Wh
- 89 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
- 1h 8m
- 68 Wh / 60 W = 1h 8m
- 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
Smallest matching record (8h)Jackery Explorer 600 Plus
WattRunTime.com
WattRunTime estimate
Estimated runtime
1h 8mOutput or startup compatibility is not establishedUsable energy68 Wh
Average load60 W
Fixed station overheadUnknown (not included)
Running watts60 W
Max surgen/a
Runtime range
Conservative43m
Estimated1h 8m
Optimistic1h 25m
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
Usable energy68 Wh89 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 runtime1h 8m68 Wh / 60 W = 1h 8m
Assumptions
- 89 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.
- Output or startup compatibility is not established
- The selected station output rating is unknown, so running-load compatibility is not verified.
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Planning notes
- Capacity class: 88.8 Wh. Size the battery for your measured average load and required hours, including reserve.
- Tracked output: unknown. 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: unknown. Check the complete carrying setup, cables and battery extensions before choosing this model for travel.
- unknown: Battery chemistry, AC output, Surge output, DC output, Solar input, Weight
Models: MARBERO
Compare nearby capacity records from the same brand, then check output, weight and missing fields. A larger battery does not establish device compatibility.
MARBERO PL60
88.8 Wh · AC output: 100 W · Confidence: Estimated
MARBERO M82
88 Wh · AC output: unknown · Confidence: Estimated
MARBERO PL100
118.4 Wh · AC output: 100 W · Confidence: Estimated
Sources
- MARBERO M138 official product page (Official; checked 2026-08-26)