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MARBERO M138 Runtime Calculator
Use this source-linked record to estimate runtime from tracked capacity, output, charging, and weight fields. Unknown specs stay unknown until an official or manufacturer-grade source confirms them.
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.
Capacity88.8 Wh
AC outputunknown
Surgeunknown
Chemistryunknown
ConfidenceEstimated
Source regionglobal/general
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 |
| Last verified | 2026-08-26 |
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 Starting Points
These are formula estimates using the tracked capacity, a 10% reserve, and each scenario's default wattage and duty cycle. They are planning starters, not measured runtimes.
Swipe table sideways
| Scenario | Default load | Estimate | Scenario confidence | Station page |
|---|---|---|---|---|
| Full-size refrigerator | 500 W at 33% | AC output unknown | Estimated | Use calculator |
| CPAP without heated humidifier | 40 W at 100% | AC output unknown | Estimated | Use calculator |
| Starlink Mini | 32 W at 100% | AC output unknown | Estimated | Use calculator |
| Wi-Fi router | 12 W at 100% | AC output unknown | Estimated | Use calculator |
| LED TV | 100 W at 100% | AC output unknown | Estimated | Use calculator |
Calculator for this station
Adjust watts, duty cycle, reserve, output path, and startup surge with MARBERO M138 prefilled from the source-linked specs above.
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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
1h 8mEstimated runtime: 1h 8mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.
Conservative43m
Estimated1h 8m
Optimistic1h 25m
Conservative assumes harder conditions; optimistic assumes favorable conditions.
- This is an estimate. Real runtime changes with load, temperature, battery age, AC/DC output, and device behavior.
- 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 8mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.Usable 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.
- The selected station output rating is unknown, so running-load compatibility is not verified.
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Good fit when
- Capacity is a compact class; use it for small electronics and short essentials rather than high-wattage appliances.
- AC output is unknown in the current source record, so do not assume it can run AC appliances.
Watch out for
- Surge output is unknown, so do not assume compressor, pump, or power-tool startup will work.
- Still unknown in the source-backed record: battery chemistry, ac output, surge output, dc output, solar input, weight.
- Weight is unknown, so portability should not be inferred from this model page yet.
- Confidence is not marked verified; keep the linked source context visible before making a purchase or emergency plan.
Related MARBERO Records
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Sources
- MARBERO M138 official product page (official; checked 2026-08-26)