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Step 1: Enter your zip code

Enter your zip code, and we'll look up the the sun hours in your area.
5
Sun Hours/Day

How many Sun Hours do you average per day?

This is based on an annual average. Depending on your location and energy usage patterns, you might need a larger system to avoid using a backup generator excessively during the winter months.

You can also look at the Solar Map to find this number.

Typically 4-6 hours, most of the US receives an average of around 5 sun hours per day.
*An overestimation of sun hours will result in an incorrect system calculation.

Step 2: Choose your mounting option

Where do you plan on mounting your solar panels?



Step 3: Describe your shade coverage

How much shade will affect your solar panels?




Step 4: Fill Out Load Evaluation Calculator

Wholesale Solar Load Evaluation Calculator

Appliance
Quantity
Watts (V x A)
Mult. * 1.5 for AC conversion
Hours On per Day
Watt Hours per Day
Show Appliance Consumption Table *
* Use these estimates to provide a
general watt value for your appliances.
Total Watt Hours per Day:
Watt Hours Required Assuming Inherent Efficiency Loss:
Killowatt Hours Per Month:
Kwh/mo

Step 5: Calculate System Size

Click the "Calculate My System Size button" and we'll calculate your system size.

Reset

Minimum

System Size
Kilowatts

Approximate

Solar Panel Wattage
300
Watts

Approximate Number of

Solar Panels Needed:
Solar Panels

This is a very general system size estimation. Other factors such as shade, location, available panel space, and seasonal use need to be taken into account.

For the most accurate and personalized system size calculation, call our solar experts at 1-800-472-1142.

We want to help you get the system that’s right for you.


Todd, the Off-Grid Guru

Questions? Chat with us!

Todd built his own 3 kW solar system to power his Northern California home, where he lives off the grid with his wife and children. Todd and the rest of the Wholesale Solar team are here to answer any questions you have about designing a system that will fit your needs. Give us a call—we’re here to help.

Download Our Solar Battery Guide
A poorly designed system can ruin your batteries. Our Solar Battery Guide will help you size your battery bank properly and keep things running smoothly.
Get Free Guide
ApplianceWatts
Kitchen
Blender500
Can Opener150
Coffee Machine1000
Dishwasher1200-1500
Espresso Machine800
Freezer - Upright - 15 cu. ft.1240 Wh/Day**
Freezer - Chest - 15 cu. ft.1080 Wh/Day**
Fridge - 20 cu. ft. (AC)1411 Wh/Day**
Fridge -16 cu. ft. (AC)1200 Wh/Day**
Garbage Disposal450
Kettle - Electric1200
Microwave1000
Oven - Electric1200
Toaster850
Toaster Oven1200
Stand Mixer300
Heating/Cooling
Box Fan200
Ceiling Fan120
Central Air Conditioner - 24,000 BTU NA3800
Central Air Conditioner - 10,000 BTU NA3250
Furnace Fan Blower800
Space Heater NA1500
Tankless Water Heater - Electric1500
Water Heater - Electric4500
Window Air Conditioner 10,000 BTU NA900
Window Air Conditioner 12,000 BTU NA1200
Well Pump - 1/3 1HP750
Laundry
Clothes Dryer - Electric3000
Clothes Dryer - Gas1800
Clothes Washer800
Iron1200
ApplianceWatts
Living Room
Bluray Player15
Cable Box35
DVD Player15
TV - LCD150
TV - Plasma200
Satellite Dish25
Stereo Receiver450
Video Game Console150
Lights
CFL Bulb - 40 Watt Equivalent11
CFL Bulb - 60 Watt Equivalent18
CFL Bulb - 75 Watt Equivalent20
CFL Bulb - 100 Watt Equivalent30
Compact Fluorescent 20 Watt22
Compact Fluorescent 25 Watt28
Halogen - 40 Watt40
Incandescent 50 Watt50
Incandescent 100 Watt100
LED Bulb - 40 Watt Equivalent10
LED Bulb - 60 Watt Equivalent13
LED Bulb - 75 watt equivalent18
LED Bulb - 100 Watt Equivalent23
Office
Desktop Computer (Standard)200
Desktop Computer (Gaming)500
Laptop100
LCD Monitor100
Modem7
Modem150
Printer100
Router7
Smart Phone- Recharge6
Tablet- Recharge8
ApplianceWatts
Tools
Band Saw - 14"1100
Belt Sander - 3"1000
Chain Saw - 12"1100
Circular Saw - 7-1/4"900
Circular Saw 8-1/4"1400
Disc Sander - 9"1200
Drill - 1/4"250
Drill - 1/2"750
Drill - 1"100
Hedge Trimmer450
Weed Eater500
Misc.
Clock Radio7
Curling Iron150
Dehumidifier280
Electric Shaver15
Electric Blanket200
Hair Dryer1500
Humidifier200
Radiotelephone - Receive5
Radiotelephone - Transmit75
Sewing Machine100
Vacuum1000

Note: TVs, Computers, and other devices left plugged in but not turned on still draw power.

**To estimate the number of hours that a refrigerator actually operates at its maximum wattage, divide the total time the refrigerator is plugged in by three. Refrigerators, although turned "on" all the time, actually cycle on and off as needed to maintain interior temperatures.

System size (kW)Daily Production EstimateExample panel configurationApproximate Price Range (before 30% federal tax credit)
1.1 kW
Summer 4.5 kWh
Winter 2.0 kWh
4 × 275 W$7,100
1.65 kW
Summer 11.0 kWh
Winter 5.5 kWh
6 × 275 W$9,800 - $14,800
3.3 kW
Summer 14.5 kWh
Winter 7.0 kWh
12 × 275 W$12,300 - $22,600
4.13 kW
Summer 18.0 kWh
Winter 9.0 kWh
15 × 275 W$13,200 - $23,500
4.95 kW
Summer 22.0 kWh
Winter 11.0 kWh
18 × 275 W$15,500 - $25,800
6.6 kW
Summer 29.5 kWh
Winter 14.5 kWh
24 × 275 W$23,800 - $44,600
7.08 kW
Summer 31.5 kWh
Winter 15.5 kWh
24 × 295 W$25,700 - $46,500
8.25 kW
Summer 37.0 kWh
Winter 18.5 kWh
30 × 295 W$28,000 - $48,800
9.9 kW
Summer 45.5 kWh
Winter 22.0 kWh
30 × 275 W$32,200 - $54,700
12.38 kW
Summer 55.5 kWh
Winter 25.5 kWh
45 × 275 W$41,300 - $44,400
13.28 kW
Summer 59.5 kWh
Winter 29.5 kWh
45 × 295 W$44,900 - $48,000
14.85 kW
Summer 66.5 kWh
Winter 33.0 kWh
54 × 275 W$44,100 - $47,200
14.85 kW
Summer 74.0 kWh
Winter 37.0 kWh
54 × 275 W$61,500
17.7 kW
Summer 79.5 kWh
Winter 39.5 kWh
60 × 295 W$68,100
19.8 kW
Summer 89.0 kWh
Winter 44.5 kWh
72 × 275 W$67,900
21.24 kW
Summer 95.5 kWh
Winter 47.5 kWh
72 × 295 W$73,600
SystemPart No.Array Size (STC)Daily Production EstimatePanelsPrice
18907092.47 kW
Summer 4.5 kWh
Winter 2.0 kWh
9 Canadian Solar CS6K-275P Silver Poly Solar Panels
SALE $8,677.00
SAVE UP TO $1,624
See Details
18913352.65 kW
Summer 11.95 kWh
Winter 5.97 kWh
9 SolarWorld SWA 295 Plus Black Frame Mono Solar Panels
SALE $8,677.00
SAVE UP TO $1,624
See Details