Calculate Your
Power Needs
Use our handy calculator
to help select the Inverter/PowerDelivery Module that's right for your
project. Please note that all calculations are approximate. To get exact
system sizing, be sure to contact your SolarSense representative.
Volts
x Amps = Watts - a formula you should get to know.
Volts x amps = watts is
the one electrical formula most used to help customers determine their
battery storage and power delivery requirements. All appliance wattage
draws listed in the table are approximate.
Whenever possible, you
should multiply the amp rating of your appliance by its AC voltage draw
to determine wattage. This information can be found on the manufacturer's
product information plate.
Appliance
wattage draws
It is useful to note that
some loads don't always have a continuous wattage draw. Be aware
of these loads when sizing your inverter. The most common situations
are:
- High start-up surge
requirements with lower continuous wattage (refrigerators and power
tools). These are designated in the following table as "HS"
- Loads in standby mode
, that come "on" for shorter periods of time. (pumps and
freezers). These are designated as "SB"
- Intermittent loads
with high wattages. These are designated as "I"
- Loads that operate
continuously at rated wattages. These are designated as "C"
Sizing
the right inverter system to your appliance power ratings
Use the appliance wattage-draw
table to determine the wattage of the appliances you wish to use. Use
the manufacturer's specifications on the product nameplates if
possible.
- Add up the sum total
of all the appliances you wish to run simultaneously.
- Select the inverter
system with a continuous wattage rating that exceeds the figure calculated
in the first step.
| APPLIANCE
WATTAGE DRAW TABLE
|
| Enter
the number of applicances of each type that you will be running
simultaneously. The total wattage required will be calculated below. |
|
|
Appliance
|
Location
|
Load type
|
Estimated
Wattage
|
|
|
Hair Dryer
|
Bathroom
|
I
|
1250
|
|
|
Hair Curling Iron
|
Bathroom
|
I
|
80
|
|
|
Waterpik
|
Bathroom
|
I
|
100
|
|
|
Shaver
|
Bathroom
|
I
|
20
|
|
|
Electric Toothbrush
- Charging Stand
|
Bathroom
|
I
|
10
|
|
|
Vacuum Cleaner -
Full size
|
Chores
|
I
|
550
|
|
|
Iron
|
Chores
|
I
|
1000
|
|
|
Washing Machine
|
Chores
|
I
|
500
|
|
|
Hedge Trimmer
|
Chores
|
I
|
500
|
|
|
Weed Eater
|
Chores
|
I
|
500
|
|
|
Sewing Machine
|
Chores
|
I
|
100
|
|
|
Vacuum Cleaner -
Hand
|
Chores
|
I
|
100
|
|
|
Computer - Desktop
|
Consumer Electronics
|
C
|
225
|
|
|
TV - 25"
|
Consumer Electronics
|
C
|
150
|
|
|
Printer
|
Consumer Electronics
|
I
|
100
|
|
|
TV - 19"
|
Consumer Electronics
|
C
|
70
|
|
|
Computer - Laptop
|
Consumer Electronics
|
C
|
50
|
|
|
CD Player
|
Consumer Electronics
|
C
|
35
|
|
|
VCR
|
Consumer Electronics
|
C
|
30
|
|
|
Stereo
|
Consumer Electronics
|
C
|
30
|
|
|
Satellite System
with 12' dish
|
Consumer Electronics
|
C
|
30
|
|
|
Video Games (without
TV)
|
Consumer Electronics
|
C
|
25
|
|
|
Cellular Telephone
Charger
|
Consumer Electronics
|
C
|
25
|
|
|
TV - 12"
|
Consumer Electronics
|
C
|
20
|
|
|
Clock Radio
|
Consumer Electronics
|
C
|
2
|
|
|
AC Well Pump
|
General Household
|
I, HS
|
1500
|
|
|
Electric Blanket
|
General Household
|
C
|
200
|
|
|
Ceiling Fan
|
General Household
|
C
|
25
|
|
|
Table Fan
|
General Household
|
C
|
25
|
|
|
Alarm Security System
|
General Household
|
C
|
5
|
|
|
Electric Clock
|
General Household
|
C
|
5
|
|
|
Toaster
|
Kitchen
|
I
|
1250
|
|
|
Microwave: Compact
|
Kitchen
|
I
|
900
|
|
|
Microwave: Large
|
Kitchen
|
I
|
1500
|
|
|
Dishwasher
|
Kitchen
|
I
|
1500
|
|
|
Waffle Iron
|
Kitchen
|
C
|
1200
|
|
|
Hot Plate
|
Kitchen
|
C
|
1200
|
|
|
Frying Pan
|
Kitchen
|
C
|
1200
|
|
|
Coffee Maker
|
Kitchen
|
C
|
800
|
|
|
Sink Garbuerator
|
Kitchen
|
I
|
450
|
|
|
Blender
|
Kitchen
|
I
|
300
|
|
|
Popcorn Popper
|
Kitchen
|
I
|
250
|
|
|
Coffee Pot
|
Kitchen
|
C
|
200
|
|
|
Lights - 40 watt
incandescent:
|
Lights
|
C
|
40
|
|
|
Lights - 60 watt
incandescent:
|
Lights
|
C
|
60
|
|
|
Lights - 100 watt
incandescent:
|
Lights
|
C
|
100
|
|
|
Lights - 100 watt
compact fluourescent equivalent
|
Lights
|
C
|
30
|
|
|
Lights - 75 watt
compact fluourescent equivalent
|
Lights
|
C
|
20
|
|
|
Lights - 60 watt
compact fluourescent equivalent
|
Lights
|
C
|
16
|
|
|
Lights - 40 watt
compact fluourescent equivalent
|
Lights
|
C
|
11
|
|
|
Refrigerator
|
Refrigeration
|
SB, HS
|
400
|
|
|
Small Freezer
|
Refrigeration
|
SB, HS
|
300
|
|
|
9" Disc Sander
|
Shop
|
HS
|
1200
|
|
|
3" Belt Sander
|
Shop
|
HS
|
1100
|
|
|
12" Chain Saw
|
Shop
|
HS
|
1100
|
|
|
1" Drill
|
Shop
|
HS
|
1000
|
|
|
1/2" Drill
|
Shop
|
HS
|
750
|
|
|
1/4" Drill
|
Shop
|
HS
|
250
|
|