Interactive off-grid planning
Starlink power, battery runtime and solar calculator
Use this Starlink power calculator to estimate daily energy use, battery runtime and solar requirements. Start with your equipment’s measured consumption, then adjust the battery and operating hours to match your setup.
These results are planning estimates. For more useful inputs, measure your equipment during normal operation. Also, account for the other appliances that share your battery, such as refrigeration, lighting and computers.
Enter your power and battery details
The starting values are examples, not specifications for a particular Starlink kit. Replace them with figures that match your equipment and travel conditions.
How the Starlink power calculator estimates work
Daily equipment energy
Average watts × operating hours = watt-hours per day.
For example, a 50-watt load running for eight hours uses 400 Wh. This describes the entered load before any additional losses.
Usable battery runtime
Battery volts × amp-hours × usable fraction × power-path efficiency ÷ load watts.
With the starting values, 12.8 × 100 × 0.80 × 0.90 ÷ 50 gives about 18.4 hours. This assumes a charged battery, a constant load and no other appliances drawing power.
Baseline solar estimate
Daily equipment watt-hours ÷ peak sun hours ÷ solar-system efficiency.
The starting values give 400 ÷ 5 ÷ 0.75, or about 107 W before rounding. To include the separate 90% power-path efficiency, the estimate becomes about 119 W before charging losses, other loads or a weather reserve.
What to add separately
Include refrigeration, lights, pumps, computers and any accessories outside your measured load. Also, allow for battery charging losses and days with poor solar output.
Choose realistic calculator inputs
First, measure consumption during typical use. Then compare several operating periods so one unusually quiet session does not determine your whole power plan.
- Include the dish, router and required accessories in your measured load.
- Account for startup and changes in operating conditions.
- Use a realistic daily schedule.
- Check the battery manufacturer’s usable-capacity limits.
- Avoid counting conversion losses twice.
- Use seasonal solar estimates for the places you visit.
- Include every other appliance sharing the battery.
- Ask a suitable installer to assess critical or high-current systems.
Finally, compare the estimate with actual battery use. Adjust your assumptions if the system performs differently in practice.
Starlink power and battery questions
Why does my measured wattage change?
Consumption can vary with equipment and operating conditions. Therefore, measure typical use over time instead of relying on one reading. Keep an allowance for higher demand.
Is a 100 Ah battery enough?
Amp-hours alone do not determine runtime. You also need battery voltage, usable capacity, conversion efficiency and the equipment load. In addition, other appliances reduce the energy available to Starlink.
Does runtime mean hours per day?
The runtime result estimates continuous operating hours from the available battery energy. Your daily schedule determines how you spread those hours across days. However, the estimate does not model changing loads or solar charging during operation.
What if I measure power at the battery?
If your measurement captures the full Starlink setup and its conversion losses, enter that wattage and set power-path efficiency to 100%. Otherwise, the runtime calculation would count the same losses twice.
Should I use an inverter or DC conversion?
Compare compatible equipment for your specific Starlink model. Check power requirements, protection and measured efficiency. A suitable choice depends on the complete installation.
Can I size my solar panels from this result alone?
Use the result as a starting estimate. Then add any losses outside the calculation, other appliances and a reserve for poor conditions. Panel output also depends on location, season, shade and installation.
Still choosing your Starlink setup?
Confirm your equipment and service requirements before ordering. Our referral link opens Starlink’s Residential page. Check eligibility separately for your selected kit and plan, particularly if you need a travel service.
Referral disclosure: If you order through our Starlink referral link and qualify, DigArt may receive a benefit. Starlink sets the eligibility rules, service-credit amounts and offer conditions.
