How To Size A Solar Panel Array

Add up your kwh usage for 12 months and divide by 12 to figure out your average monthly.

How to size a solar panel array.

A 2 000 square foot home in california may need 23 sixty cell panels or 18 larger seventy two cell solar panels to be energy efficient. N ext we take the total anticipated energy production and divide that number by the panel size in watts. The number of watt hours wh you plan to produce in one day. The insolation value at your location.

All we have to do is find the current through the controller by using power voltage x current. The controller size is then 1000 24 41 67 amps. Our test system will use 205 watt solar panels. 270v 39 28v 6 87.

Enter the distance in feet from your solar panels to your battery bank charge controller. Gather the kilowatt hours kwh usage from your electric bill. First we want to calculate the minimum number of panels we should put in a string. Determine your average monthly kwh usage.

Click on calculate to see the size wire required in awg american wire gauge. 8900 divided by 205 43 4 panels. The final calculation for the array size in number of panels to use is below. Enter the total amps that your solar panels will produce all together.

You ll want to have full 12 months of usage to be able to look at peaks and. Take the power produced by the solar panels and divide by the voltage of the batteries. To estimate the size of your solar array you ll need to know. Your charge controller should be rated for this.

Calculate your kwh usage. We then took 11 000 kwh and divided it by the respective ratios and then divided that number by 250 the typical panel wattage. 8 9 x 1000 8900 watts. In order to find a range for number of solar panels we compared arizona and maine s solar panel production ratios 1 31 and 1 61 the highest and lowest in the u s.

Find your minimum string size. This works out to 15 sixty cell 275 285 watt solar panels or 12 seventy two cell 350 watt solar panels. For that take the low end of the mpp range in this case 270v and divide by the vmp of the panel 39 28.