How To Find Dc Kw Size Of Solar Panel

6 2 kwh x 1000 convert to watts 6200 watts solar panel required.

How to find dc kw size of solar panel. When we speak of the power output or the system cost we consider the dc side of the system. Match dc array size to inverter input size. If you install the same sized array with a 5000 inverter the ratio is 1 2. Of panels requiered 24 000 250 96 panels as you realized i had to compensate on the available area for pv installation in order to reach an optimum point both for system production and cost.

So if you have a 7 5 kw dc system working an average of 5 hours per day 365 days a year it ll result in 10 950 kwh in a year. 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. Pick your inverter based on your array size. For example if your array is 6 kw with a 6000 w inverter the array to inverter ratio is 1.

33 kwh 6 1 sun hours x 1 15 efficiency factor 6 2 kw dc solar system size required using the example above with a 6 2 kw dc system you can multiply this number by 1 000 to confirm that you need 6 200 watts of solar panels. The array size is 10 350 watts or 10 35 kw. You ll need 6 2 kw dc according to the formula. We then took 11 000 kwh and divided it by the respective ratios and then divided that number by 250 the typical panel wattage.

Determine panel string size. Now divide that number by the energy production ratio of solar panels. The array to inverter ratio of a solar panel system is the dc rating of your solar array divided by the maximum ac output of your inverter. That is the number you take from your energy bill.

As a guide you ll need 4 x 250w panels or 3 x 330w for every 1kw of your solar system. 30 x 345 10 350 watts. To figure out how many kilowatt hours kwh your solar panel system puts out per year you need to multiply the size of your system in kw dc times the 8 derate factor times the number of hours of sun. That number varies between 1 31 and 1 61.

However the wattage output w of the panels will likely vary between 250w and 360w for a more efficient module. This last number represents the approximate number of kwh year a set of solar panels will produce according to their location. By doing this you can determine the minimum surge wattage you ll need your inverter to be rated for. Pair panels to the appropriate optimizers.

You can find this out by looking at the sticker on the back of all of the appliances you will be using with your solar system and checking the potential surge watts of each appliance.