How To Size Power Inverter For Solar Panel

Then divide the kw output by your panel s efficiency to get the estimated number of solar panels you ll need for your system.

How to size power inverter for solar panel.

The first step of knowing how to size an inverter is to know how you would rate it. For your inverter to be right for your system it s watts rating must be approximately equal to your solar system s watts rating. In our example we re going to design for an array with 30 astronergy 345w solar panels. While doing that add up everything right from devices like microwaves cooker and lights to clocks and laptops.

During the inverter sizing you need to take into account the different configuration limits see the table below. Pair panels to the appropriate optimizers. Therefore if your solar system is rated at 2000 watts you ll need a solar inverter with about 2000 watts maybe a little bit more. And that is when the sizing your inverter part comes in.

Determine panel string size. The total sum gotten shows the size of the inverter you will need in your home. To figure out how to size your solar system take your daily kwh energy requirement and divide it by your peak sun hours to get the kw output. 30 x 345 10 350 watts.

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. The latter allows us to save cost by not purchasing another inverter and like we saw in figure 1 we can still harvest more energy during off peak hours. To determine this add up the wattage of all devices and appliances which functions at the same time in your home. This is the correct way to size an inverter.

Peak output is the wattage that an inverter can supply for short periods of time when the demand spikes while continuous output is the limit for. If we want a larger system size we could place another 100 kw block a section of solar panels connected to an inverter or we can pack more dc power generation onto our first inverter. If you install the same sized array with a 5000 inverter the ratio is 1 2. The solar inverter should be at least of size that would be able to handle the strain of generating and delivering the dc current to the inverter and convert it into ac power.

The rule of thumb for inverter overclocking is that solar panel capacity should not be more than roughly 30 greater than inverter capacity e g. The array size is 10 350 watts or 10 35 kw. 20 solar pv panels type trina solar tsm pd14 320 w. The inverter sizing comprises two parts voltage and current sizing.

For example if your array is 6 kw with a 6000 w inverter the array to inverter ratio is 1. Pick your inverter based on your array size. Peak car power inverter outputs the other factor to keep in mind when determining the necessary size of a power inverter is the difference between continuous and peak power output. Match dc array size to inverter input size.