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Solar Panels

What Can a 3kW Solar System Run? kWh per Day, Appliances and Battery Backup

A 3kW solar system makes about 12 kWh a day in the US, 7 kWh in the UK and 14.4 kWh in Australia. See which appliances it runs, how many panels it needs and what battery suits it.

October 3, 2026 · 6 min read

Appliance Wattage Guide

  • Refrigerator 150W (1.5 kWh/day)
  • 5,000 BTU Window AC 450W – 500W
  • Starlink Satellite 50W – 75W
  • Microwave Oven 1,000W – 1,500W
  • CPAP Machine 40W – 60W
  • 1/2 HP Water Well Pump 800W – 1,000W

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Calculations provided for preliminary planning purposes only. Always consult a licensed electrician.