By multiplying 2 Amps x 120 Volts, you find out the refrigerator uses 240 Watts. The batteries will need to deliver 20 Amps to run the refrigerator (240 Watts/12 Volts = 20 Amps). Typically, refrigerators operate about 1/3 of the time (1/3 duty cycle), or 8 hours a day.Therefore, the A.H. drain will be 160 A.H.(8 hours x 20 Amps = 160 A.H.). After the load and running time is established, the battery bank size can be calculated.ypically, refrigerators operate about 1/3 of the time (1/3 duty cycle), or 8 hours a day. Therefore, the A.H. drain will be 160 A.H. (8 hours x 20 Amps = 160 A.H.). After the load and running time is established, the battery bank size can be calculated.
Heavy-duty sewing machines are built to handle thick fabrics like denim or leather and are made for long-lasting durability and dependability. Learn more about what makes a heavy-duty sewing machine different and compare some of the top selling heavy-duty machines.
This speedy machine will get your sewing done in a snap. Straightforward and simple to use, the typical tasks are done with ease. Threading the machine and bobbin are both done easily, as are changing the needle and presser foot. The Singer 4411 is good for a beginner who is going to do basic sewing.