Running Starlink from a Marine Lithium Battery
Calculate Starlink power consumption on a yacht and size lithium batteries and solar for Starlink Standard or Starlink Mini.
Starlink has become a major liveaboard load because it can run for many hours per day.
As of 2026, Starlink lists approximate average power consumption of:
- Starlink Standard family: commonly around 75-100W depending on model and operating conditions
- Starlink Mini: around 20-40W average
Always confirm the current specification for the exact hardware.
Standard Starlink at 85W planning average
| Runtime | Daily energy |
|---|---|
| 4h | 340Wh |
| 8h | 680Wh |
| 12h | 1.02kWh |
| 18h | 1.53kWh |
| 24h | 2.04kWh |
A 24-hour Starlink Standard installation can consume more energy than the fridge, freezer, lights and laptops combined.
Starlink Mini at 30W planning average
| Runtime | Daily energy |
|---|---|
| 4h | 120Wh |
| 8h | 240Wh |
| 12h | 360Wh |
| 24h | 720Wh |
Efficiency matters
If Starlink can be powered directly from a suitable DC source approved for the hardware, a system may avoid some AC inverter losses and standby consumption.
Do not create a non-standard DC arrangement without checking voltage, current, connector and warranty requirements.
Turn the appliance into a daily energy figure
The peak wattage tells you whether the inverter and BMS can start the load. Runtime tells you what it does to the battery bank. Treat those as separate checks, then include conversion losses and the loads already running aboard.
- Measure typical watts and realistic hours per day, including standby use and cycling loads.
- Check startup surge and maximum simultaneous current against the inverter, BMS and cabling.
- Test the result against a poor-solar day and preserve a reserve for essential navigation and safety loads.