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Renogy Phoenix 300 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.

| Battery capacity | 337 Wh |
|---|---|
| Battery chemistry | Li-ion |
| AC output | 300 W |
| Surge output | unknown |
| DC output | unknown |
| USB-C output | 60 W |
| Solar input | unknown |
| Weight | 2.9 kg |
| Confidence | Estimated |
| Lifecycle status | Unknown |
| Source region | mixed regional |
| Last verified | 2026-07-10 |
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.
| Scenario | Default load | Estimate | Scenario confidence | Station page |
|---|---|---|---|---|
| Full-size refrigerator | 500 W at 33% | above tracked AC output | Estimated | Use calculator |
| CPAP without heated humidifier | 40 W at 100% | 6h 27m | Estimated | Use calculator |
| Starlink Mini | 32 W at 100% | 8h 32m | Estimated | Use calculator |
| Wi-Fi router | 12 W at 100% | 22h 15m | Estimated | Use calculator |
| LED TV | 100 W at 100% | 2h 35m | Estimated | Use calculator |
Calculator for this station
Adjust watts, duty cycle, reserve, output path, and startup surge with Renogy Phoenix 300 prefilled from the source-linked specs above.
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Estimated runtime
4h 18mEstimated runtime: 4h 18mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.
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.
- Usable energy
- 258 Wh
- Average load
- 60 W
- Fixed station overhead
- Unknown (not included)
- Running watts
- 60 W
- Max surge
- n/a
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
- Rated battery
- 337 Wh
- Battery capacity (Wh): 337 Wh
- Usable energy
- 258 Wh
- 337 Wh x 85% x 90% x 100% x 100%
- Average load
- 60 W
- 60 W running, 60 W average after duty cycle and quantity
- Fixed station overhead
- Unknown (not included)
- 60 W / 85% = 70.6 W battery draw; fixed overhead is unknown and excluded
- Estimated runtime
- 4h 18m
- 258 Wh / 60 W = 4h 18m
- 337 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
This link contains the numeric values you entered, but not custom load names.
WattRunTime.com
WattRunTime estimate
Estimated runtime
4h 18mThis setup is tight. Reduce load, use DC where possible, or choose a larger station.Runtime range
Show your work
Rated Wh is reduced by efficiency, reserve, battery health, and temperature before it is divided by average load.
Assumptions
- 337 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.
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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.
- Tracked AC output is 300 W, so high-draw appliances and tools need careful filtering.
- USB-C output is tracked at laptop-class power, useful for direct DC charging when the device supports it.
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: surge output, dc output, solar input.
- Confidence is not marked verified; keep the linked source context visible before making a purchase or emergency plan.
Related Renogy Records
Nearby source-linked models from the same brand help you compare capacity, output, and unknown fields without leaving the data set.
Phoenix 200
222 Wh, 200 W AC output, confidence: Estimated.
Phoenix 500
495 Wh, 800 W AC output, confidence: Verified.
Lycan 5000
4,800 Wh, 3,500 W AC output, confidence: Estimated.
Sources
- Renogy Phoenix 300 product article (official; checked 2026-07-10)
- Renogy Phoenix 300 product document (official; checked 2026-07-10)
