On-grid Calculator Solar Array

Load Calculator Use this form if you don't know what your power consumption (kilowatt-hours) is. Name: Date

Appliance* Qty

Watts (Volts x Amps)

Hrs/Day

Watt Hrs/Day

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 Total Watt Hrs Per Day: Total Kilowatt Hrs Per Month (30 Days): (write down this value and enter it into Step 1 of solar panel sizing calculator) © 2005 Alternative Energy Store - www.AltEnergyStore.com *Help! I'm not sure of the wattage of my appliances. Select the appliances from this drop down menu. To the right will appear typical wattage values for the appliance you selected. However, for the most accurate information look on your appliance to find its wattage rating (or it amperage rating and then multiply that by its voltage to approximate its wattage). Stereo

Watts

Welcome to the Alternative Energy Store Calculator. This calculator is designed to help you size a system for on-grid use.

Grid Tie System Sizing Determine the size of the solar panel array you will need. Step 1: How many kilowatt-hours (kwh) does your home/location use per month? (This value is usually printed on your electric bill. If you don't have a bill, or don't know your consumption, click on 'load calculator' at the top of this page to go through the steps to determine this value.) kilowatthours per month Step 2: You need to determine the average number of sun hrs per day. Select the State-City Closest to your location (currently only US states are provided) MA-Boston

Average sun-hours per day or Manually enter the average sun-hours for your location. Step 3: The total wattage of Solar Panels that you need is:

This value takes into account losses due to system inefficiencies. Step 4: How many solar panels do you need? That depends on the panel you choose.

Select the wattage of the panel your interested in, and see the results below: 18

© 2005 Alternative Energy Store - www.AltEnergyStore.com

| Solar Panels | Load Calculator | To use this form, simply list all of your appliance that use electricity. These are items like Refrigerator, Range, computer, stereo, lights etc.. For each appliance, enter the number of that appliance that you own (Qty), the power is uses (Watts) and the number of hours a day (Hrs/Day) you use the item. We have a provided a list of common appliance and their power consumption at the bottom of the page.

Load Calculator Use this form if you don't know what your power consumption (kilowatt-hours) is. Name: Date

Appliance* Qty 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19

Watts (Volts x Amps)

Hrs/Day

Watt Hrs/Day

20 Total Watt Hrs Per Day: Total Kilowatt Hrs Per Month (30 Days): (write down this value and enter it into Step 1 of solar panel sizing calculator) © 2005 Alternative Energy Store - www.AltEnergyStore.com *Help! I'm not sure of the wattage of my appliances. Select the appliances from this drop down menu. To the right will appear typical wattage values for the appliance you selected. However, for the most accurate information look on your appliance to find its wattage rating (or it amperage rating and then multiply that by its voltage to approximate its wattage). Stereo

Watts

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