Xantrex Technology SW Plus 4048 Manual De Usuario

Battery Information

C–8

976-0043-01-02

Calculation

To calculate the battery bank size, use the average amp-hours per day that 
you calculated using 

, then make the other calculation shown in 

 to calculate the battery bank size you need to support your 

loads.

Worksheets

 and 

 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. 

 provides a typical wattage for selected appliances. However, 

you should try to find the exact wattage on the appliance label.

Table C-2 Determining Battery Bank Size

Average amp hours per day

95

Divided by inverter efficiency (90%) for 

Sine Wave Plus

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 C-3 Typical Appliance Wattage

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