Calculate your air conditioner’s power draw first—most RV units require 1,500-3,500 watts to start and 1,000-2,000 watts to run continuously. Multiply your running watts by the hours you’ll use AC daily, then add 20% for system inefficiencies to determine your true solar needs. A typical 15,000 BTU unit running 8 hours needs roughly 10,000-12,000 watt-hours of energy storage.
Invest in lithium batteries over lead-acid for AC applications. You’ll need substantial capacity—typically 600-1,200 amp-hours at 12V (or 300-600Ah at 24V)—because air conditioning drains power faster than any other RV appliance. Lithium…
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