Starlink backup calculator

Estimate power station runtime for Starlink-style internet.

Choose a current Starlink power range or enter measured AC watts, then add battery size, usable capacity, and planned hours. The calculator estimates runtime and daily solar energy needed.

Estimated runtime9.1 hours

This setup clears your 8 hour internet target.

Inputs

Internet load and battery

Internet setup wattsUse a watt meter or current power specs for your exact dish/router setup.Extra router or Wi-Fi wattsAdd a separate router, mesh node, or small network switch if used.Power station capacityUse listed watt-hours. For 12V batteries, convert first with the amp hours to watt hours calculator.Usable battery percentAccounts for inverter losses, reserve, and real-world headroom.Hours neededUse the internet window you actually need, not a full day by default.Good sun hoursUsed to estimate panel watts for daily recharge.Solar energy deliveredPlanning allowance for panel conditions, wiring, and charging losses. Replace the default when you have better data.

Inputs valid. Estimate updated.

Preset ranges come from Starlink's current power-use guidance, checked July 16, 2026. Starlink says actual use varies with model, temperature, location, and utilization.

Use your real watt draw if possible

Satellite internet power use changes by model, router setup, temperature, firmware behavior, and whether extra networking gear is running. Use the presets only as starting points.

Next checks

Match internet runtime with recharge time

Recharge

Solar recharge time calculator

Check whether your panel can refill the battery before the next internet session.

Open calculator

Solar panels

Will a 100W panel recharge my power station?

See why panel watts, input limits, and sun hours decide whether the setup works.

Read guide

Outage

Outage backup load planner

Add internet to phones, lights, fridge, and other outage loads.

Open planner