Unbalanced Solar Panel String Current

This is the 14 panel string s vmpp 26 6 v 14 panels.

Unbalanced solar panel string current. Norm was ohm and the low freq. The 14 panel string will operate at its impp 7 90 a and power output is 372 v 7 90 2942 w. Norm with a load was 14 ohm in this case. A panel string is a group of panels wired into a single input on your inverter.

A four panel string would be in the 100 150volts range while an eight panel string would be in the 200 250volts range and a twelve panel string would be in the 350 400volts range. Hello guys all panels are facing the same orientation 12 on the bottom row and 4 on top row the 4 situated to the left they are facing north at a 24 degree tilt. The inverter appropriately called a string inverter has three string inputs. Because the current remains the same through the entire string the current is reduced to that of the panel with the lowest current.

So the system was operating essentially with two strings of 11 and one string of 10. String voltage is set at 372 v by the inverter. Each panel is thus operating at 372 v 13 panels 28 6 v. One upsolar panel needed replacement its output was zero.

The string voltages should also give an idea of how many panels per string. Connecting solar panels in parallel. For example this grid tied system contains 24 mission solar 360w panels and one sma sunny boy 7700w inverter. An sb 6000 has 3 strings of 11 upsolar 225s.

I would ask to see the schematics of the system. So if they re on different orientations it s normal for the current of the two strings to be different. Current on the other hand will be directly proportionate to sunlight levels. One drawback to stringing in series is that a shaded panel can reduce the current through the entire string.

Paralled in the inverter we get. These values are very close to the series resistance value of 8 ohm.