Solar Panel String Design

A panel string is a group of panels wired into a single input on your inverter.

Solar panel string design.

Solaredge string sizing specs the se7600h inverter can handle 2 strings so we would use 2 equal strings of 15 astronergy 345w panels. Connecting solar panels in series. In this diagram we have seven solar panels strung together in series. Simply divide the inverter s maximum system voltage rating by the open circuit voltage voc of the module used and you re good.

Just like a typical battery you may be familiar with solar panels have positive and negative terminals. For many new to photovoltaic system design determining the maximum number of modules per series string can seem straight forward right. For example this grid tied system contains 24 mission solar 360w panels and one sma sunny boy 7700w inverter. That is 5 175 watts per string which is below the 6 000 watt string size limit.

Stringing solar panels in series involves connecting each panel to the next in a line as illustrated in the left side of the diagram above. When designing a solar pv system it s critical to know the minimum and maximum number of pv modules that can be connected in series referred to as a string. Pv modules produce more voltage in low temperatures and less voltage in high temperatures.