Sunstack

EcoHabs

How many solar panels and how big a battery bank do you need?

A planning estimate tool. List what you run. Sunstack answers with a panel count, a battery in kilowatt-hours, and an inverter that can start the motors.

Not a substitute for a site survey or an electrician.

Solar array
1.08 kW
Battery storage
6.0 kWh
Daily use
3.19 kWh

What you run

Pick a size — its appliances fill in below. Delete what you don’t run, or add more.

House fridge, lights, Starlink, and modest tools. Add a small rooftop A/C if you run one.

Hours are time drawing power — not time plugged in. Fridge and A/C hours are compressor runtime.

Daily load10 items

  • Efficient fridge (12 cu ft)

    AC

    1 × 80 W × 8 h running = 640 Wh/day

    Hours are compressor runtime, not plugged-in time.

    Hours running8 h

    Compressor on-time, not hours plugged in — about 33% of the day.

    1

  • LED lights (cabin / van)

    DC

    1 × 30 W × 5 h = 150 Wh/day

    Hours running5 h
    1

  • Starlink

    AC

    1 × 50 W × 10 h = 500 Wh/day

    Hours running10 h
    1

  • Laptop

    AC

    1 × 60 W × 6 h = 360 Wh/day

    Hours running6 h
    1

  • Wi-Fi router

    DC

    1 × 10 W × 24 h = 240 Wh/day

    Hours running24 h
    1

  • Phone charging

    AC

    1 × 12 W × 2 h = 24 Wh/day

    Hours running2 h
    1

  • Ceiling / box fan

    AC

    1 × 40 W × 8 h = 320 Wh/day

    Hours running8 h
    1

  • Tool battery charger

    AC

    1 × 80 W × 1 h = 80 Wh/day

    Hours running1 h
    1

  • Circular saw

    AC

    1 × 1200 W × 9 min = 180 Wh/day

    Hours running9 min
    1

  • Induction cooktop (1 burner)

    AC

    1 × 1400 W × 30 min = 700 Wh/day

    Hours running30 min
    1

Where you live

Sun hours and cloudy-day backup. Voltage follows the size you pick.

US Southeast. Annual 5.2 · shortest month 4.2 .

1.5 days

Cloudy-day autonomy. Solar is still sized to recharge one typical day.