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RV Power Worksheet

Print this page and then work your way to the bottom. Try to visualize the number of appliances you will run on a typical
24 hour period, then multiply that by the number of hours per day to give you the number of total amps used per day.

Amps x Quantity x Hours per Day = Total Amps Per Day

12 volt Appliances Amps Quantity Hours Per Day = Total Amps Per Day
Incandescent Lights 1.5      
Water Pump 4      
12 volt Television 3      
Bathroom Fan 4      
Furnace 8      
12 volt Stereo 0.8      
Propane Detector 0.2      
Refrigerator Circuit Board 0.4      

120 volt AC Appliances - Using Inverter Amps Quantity Hours Per Day = Total Amps
Television 5      
VCR / DVD Player 4      
Microwave 100      
Toaster 65      
Coffee Maker 60      
Laptop Computer 5      
Desktop Computer 15      
      Total Amps/Day  

Battery Bank Capacity (Approximate) AH = Amp Hours

Group 24 (12 Volt) = 85AH/ea
Group 27 (12 Volt) = 100AH/ea
Group 29 (12 Volt) = 115AH/ea
6 Volt (2 Batteries) = 220AH/Pair

Solar Panel Power Replacement (Approximate)

80 Watt Panel = 28 Amps/Day (Per Panel)
100 Watt Panel = 38 Amps/Day (Per Panel)
110 Watt Panel = 40 Amps/Day (Per Panel)
140 Watt Panel = 45 Amps/Day (Per Panel)

Example:

Joe is using 60 Amps per day, and wants to camp for 1 week. His RV has two 6 Volt batteries (220AH) but Joe will need approximately 420 Amps of power to get through a 7 day week (60A per day). If Joe buys a 100 watt solar panel replacing about 38A per day, Joe's net Amp usage now becomes 22A per day. Over 1 week, Joe will now use a net of 154 Amps, so with 220AH of battery power, he has enough power for his trip.
 

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