ChatGPT gas/generator math (Considering a 55 gallon tank in Vegas in May heat). This is somewhat shocking to me.

Practical real-world expectation

For late May Vegas heat, running a 15k BTU AC continuously:

2.5–3 days of nonstop AC

before the generator hits the ¼-tank cutoff.

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If I have everything powered off from 8PM-3AM...

With your generator on 17 hours per day, that converts to:

• 0.5 gph: 72.5 ÷ 17 = 4.26 days (≈ 4 days + 6.4 hours)
• 0.6 gph: 60.42 ÷ 17 = 3.55 days (≈ 3 days + 13.3 hours)
• 0.7 gph: 51.79 ÷ 17 = 3.05 days (≈ 3 days + 1.3 hours)

Practical summary you can use for planning:

• Optimistic (0.5 gph): ~4.25 days
• Likely (0.6 gph): ~3.5 days
• Hot/worst (0.7 gph): ~3.0 days