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Battery Bank Sizing
975-0012-01-02 Rev A
B–7
Battery bank size worksheet
Calculation
To calculate the battery bank size, use the average amp-hours per day that you
calculated using Table B-1, then make the other calculation shown in Table B-2 to
calculate the battery bank size you need to support your loads.
Worksheets
Table B-1 and Table B-2 are examples only. Use the specifications noted on the
label of each AC appliance and fill in the values specific for the appliances used in
this installation on the a work sheet.
Table B-3 provides a typical wattage for selected appliances. However, you
should try to find the exact wattage on the appliance label.
Table B-2
Determining Battery Bank Size
Average amp hours per day
95
Divided by inverter efficiency (90%) for DR Inverter
0.9
Divided by battery efficiency (usually 0.75)
0.75
Adjusted hours per day
140
Divided by Depth of Discharge (usually 60%)
0.6
Multiplied by days of autonomy
5
Battery bank size required
1173 Ah
Table B-3
Typical Appliance Wattage
Appliance
Watts
Appliance
Watts
Fluorescent Type Light
10
Blender
400
Computer
200-300
Toaster
1000
Microwave (compact)
600-800
Hot Plate
1800
Microwave (full-size)
1500
Washer/Dryer
375-1000
Stereo or VCR
50
3/8" Drill
500
Color Television (19")
150
Hair Dryer or Iron
1000
Refrigerator (3 cu ft)
180
Vacuum Cleaner
1200
Refrigerator (12 cu ft)
480
Coffee Maker
1200
Summary of Contents for DR1512W
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Page 3: ...DR Inverter Charger Installation and Operation Manual...
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Page 18: ...xvi...
Page 38: ...Installation 2 14 975 0012 01 02 Rev A Figure 2 9 DC Grounding...
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Page 90: ...A 8...
Page 108: ...B 18...
Page 120: ...IX 2...
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