Xantrex DR1512W User Manual

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

Xantrex DR1512W Specifications

General

Brand	Xantrex
Model	DR1512W
Category	Inverter
Language	English