Solar Pv Calculator (off-grid)

| Solar Panels | Charge Controller | Battery Bank | 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:

Buenaventura L. Pitao

Date:

14-Mar-07

Appliance/Equipment Used TV Home Theather

Quantity 3 1

Wattage 80 350

Hrs/day Watt Hrs/day 4.00 960.00 0.71 249.90

Refrigerator Computer

1 1

130 225

24.00 3.00

3,120.00 675.00

Electric Fan Lights Flat Iron

3 15 1

80 25 1000

4.00 2.00 1.29

960.00 750.00 1,286.00

Washing Machine Motor

1 0

280 3725

1.14 3.00

319.98 -

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)

8,320.88 249.63

Welcome to the Alternative Energy Store Calculator. This calculator is designed to help you size a system for off-grid use. Start by filling out the first tab, titled Solar Panels. This tab will calculate how many Solar Panels you need, based upon you load(how much electricity you consume). Once you've completed this tab, move on to the other tabs labeled Charge Controller & Battery Bank.

Solar Panel Array Sizing Determine the size of the solar panel array you will need. Step 1: How (kwh) your home/location usehave per month? (This many value kilowatt-hours is usually printed on does your electric bill. If you don't 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.)

249.63 kilowatt-hours per month Step 2: You need to determine the minimum number of sun hrs per day during the winter. Select the Closest to your location

5.1

Enter Minimum sun-hours for the month in your location

Step 3: The total wattage of Solar Panels that you need is:

1,957.86

Watts

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:

120

16.32 16.00

Enter Solar Panel Module Wattage Number of Solar Panels Required Number of Solar Panels Connected in Parallel

| Solar Panels | Charge Controller | Battery Bank | Load Calculator | Charge Controller-Used between your solar panel array and your battery bank, charge controllers optimize how your batteries are charged and prevent current from going back through the panels from the batteries during the night time.

Solar Charge Controller Sizing This calculator helps you size the solar charge controller(s) needed for your system. Step 1:

1,957.86 Wattage of Solar Panel Array Step 2:

12

Voltage of the Battery Bank

Step 3:

163.15 Amperage of Charge Controller Required 60

Enter Charge Controller Amperage Rating

2.72 Number of Charge Controllers required

3.00

Units

Charge Controllers connected in Parallel

ollers optimize how batteries during the

| Solar Panels | Charge Controller | Battery Bank | Load Calculator |

Battery Bank Sizing This calculator will help you size the battery bank for your system. Step 1:

1,957.86 Wattage of Solar Panel Array Step 2:

3

Number of days retention period due to cloudy and rainy days

Step 3:

26.7

Lowest Temperature the battery bank will experience

Battery Temperature ºC Multiplier 26.7 1 21.2 1.04 15.6 1.11 10 1.19 4.4 1.3 -1.1 1.4 -6.7 1.59

5,873.57

Amp - Hrs Battery Bank Ampere Capacity

Battery Specifications:

540 12 1 10.88

Amp - Hrs Battery amperage Rating Volts

Battery Voltage Rating

Units

Batteries per row (in Series)

Units

Number of rows in Parallel

5,873.57 Total Amp-hrs of the Battery Bank *All calculations assume only a 50% discharge to your batteries to optimize battery life.