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inverter battery

Batteries & Storage

What Size Battery Do I Need for a 1,000W Inverter?

A 1000W inverter draws about 93 amps from a 12V battery. See the minimum battery, runtime tables for lithium and AGM, cable and fuse sizes, and how to avoid low-voltage shutdowns.

October 17, 2026 · 5 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.