
For most home usages we recommend either a 120 gallon tank for short outages (1-2 days) or a 500 gallon tank for more extended time periods (8-10 days).Nov 27, 2018
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9 hours ago · Figuring a heat rate of 11,000 BTU/kWh, and knowing that propane has 91,450 BTU/gallon, 500 gallons of propane can generate 4,160 kWh. So at 20 kW, that’s 208 hours or 9 …