PV power to Inverter Power matching

[esal]

Hello,

I have a 5.6KW inverter and 4x580 Watt solar panels. Knowing that if I connect the panels in series I will reach the operating voltage of the inverter but the question is: Will the system function properly?

Thanks

[SolTex]

The panel to inverter relationship is expressed as a ratio, which is called the Inverter Loading Ratio (ILR). It is simply calculated by dividing the total panel nominal (STC) DC output rating by the inverter max continuous AC output rating. So for your case total DC output is 4 x 580 = 2320 (2.32 kW). 2.32 divided by inverter rating of 5.6 = 0.41 ILR.

Conventional wisdom suggests that a ILR of 1.25 provides optimum system performance. Your ratio is obviously way lower, which means your inverter is oversized for the four panels. If you plan to add more panels in the future, then this is fine. Otherwise, you could save money by using a smaller inverter.

[esal]

Thanks for your input. Yest there is possibility to upgrade the system later on.

Very helpful answer.