windy
nation
Page 10 of 15
VertaMax User Manual
Revision 1
Example – Ampere-hour capacity: a battery with an ampere-hour capacity of 100 ampere-hours
can deliver
5 ampere for 20 hours before it is completely discharged.
To determine the battery ampere-hour capacity:
1) Determine how many watts each piece of AC equipment (TV, light bulbs, etc)
consumes. This can normally be found on the product label. If only the current draw is
given, multiply the current draw by 115 to get the watt consumption.
2) Estimate the time (in hours) that each piece of equipment will be running between
battery charging cycles.
3) Calculate the total watt-hours of energy consumption (power in Watts x operating time
in hours) using the average power consumption and the total estimated running time (in
hours). Power x Operating Time = Watt-Hours.
4) Divide the watt-hours by 10 to determine how many battery (12 volt) ampere-hours will
be consumed.
4.2 T
YPICAL
P
OWER
C
ONSUMPTION
Appliance
Watts
Appliance
Watts
Stereo
200
Microwave - 1000 W
1000
Table Fan
200
AC (5,000 BTU)
700
TV
250
Computer
300
Small Refrigerator
350
Hair Dryer
1000
Hand Drill - 1/2"
600
Coffee Maker
1200
Light Bulb - 100 W
100
Blender
400
4.3 W
IRE
G
AUGE
R
EFERENCE
4.3.1
Ampacity Table
Load Amperage – Power @ 12VDC
10A
120W
20A
240W
30A
360W
40A
480W
50A
600W
60A
720W
70A
840W
80A
960W
100A
1200W
120A
1440W
160A
1920W
200A
2400W
250A
3000W
C
ab
le
L
en
gt
h (
fe
et
)
2
16AWG 16AWG 14AWG 12AWG 10AWG 8AWG 8AWG 6AWG 4AWG
2AWG
2AWG
2/0AWG
3/0AWG
4
16AWG 16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG
2AWG
1AWG
2/0AWG
4/0AWG
6
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG
2AWG
1/0AWG
3/0AWG
4/0AWG
8
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG
2AWG
1/0AWG
3/0AWG
4/0AWG
10
16AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG
2AWG
1/0AWG
3/0AWG
4/0AWG
12
14AWG 14AWG 12AWG 10AWG 8AWG 6AWG 6AWG 4AWG 2AWG
2AWG
1/0AWG
3/0AWG
4/0AWG
16
14AWG 12AWG 12AWG 10AWG 8AWG 6AWG 6AWG
4AWG
2AWG
2AWG
1/0AWG
3/0AWG
4/0AWG
20
14AWG 12AWG 10AWG 8AWG 6AWG 6AWG
4AWG
4AWG
2AWG
2AWG
2/0AWG
4/0AWG
4/0AWG
24
12AWG 12AWG 10AWG 8AWG 6AWG
4AWG
4AWG
2AWG
1AWG
1AWG
2/0AWG
4/0AWG
4/0AWG
28
12AWG 10AWG 8AWG 8AWG
6AWG
4AWG
4AWG
2AWG
1AWG
1AWG
2/0AWG
4/0AWG
4/0AWG
33
10AWG 10AWG 8AWG 6AWG
4AWG
4AWG
4AWG
2AWG
1AWG
1AWG
2/0AWG
4/0AWG
4/0AWG
42
10AWG 8AWG 6AWG 6AWG
4AWG
4AWG
2AWG
1AWG
1/0AWG
1/0AWG
3/0AWG
4/0AWG
NR
50
8AWG 6AWG 6AWG 4AWG
4AWG
2AWG
2AWG
1AWG
1/0AWG
1/0AWG
3/0AWG
NR
NR
NOTE: Applicable to conductors: Rated 0 through 2000 Volts with an a
mbient Temperature of
30°C (86°F)