Renewable Energy Questions/Discussion > Solar (heating or electric)

Oztules please

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junglejoe39:
Sorry for asking for you personally but figured you would know this. Plus you know some of what Im talking about from my other post. So I have those 4-100 watt panels that are the 5 inch china jobs wired in parallel with a 150 watt of the 6 inch USA type going to a 12 v 600 watt inverter. Are the 5 inch jobs choking down the 6 inch and I have 2 more of the 6 inch panels wired in series going to a 24v 600 watt inverter. Im wondering if I will get more power and think I will if I hook the 3 150 w 6 in panels in parallel to the 12 v inverter and then the 4 100w 5 in in series and parallel to the 24v inverter

oztules:
It is probable that the 6x6 are pulling down the 5x5....not the other way around...... why?

I suspect your 6x6 run at a lower voltage than the 5x5 panels. As a generality, the 6x6 cell 250w panels are 60 cells ( 30x 2 for 12v panels) and the 5x5 cell 72 cells ( 36 x 2 for 12v panels).......or even some other combo.......... Same watts, but different current and voltage to get the same watts.... count the cells in each type of panel.

If the cell count ( or the Voc from the sticker)  in the 5x5 is the same as the 6x6, then no loss of watts in the parallel connection as the Voc is the same..... if different ( Voc is different)...... then you will do a bit better if you match them up as you suggest... 5x5 together and 6x6 together to independent inverters.

More in depth understanding of solar panels can be obtained here also in a series I wrote on another site

http://www.fieldlines.com/index.php/topic,145005.0.html


..................oztules

junglejoe39:
the 5 in. voc is 21.60 and the 6 in. is 22.92

oztules:
The difference is not enough to get me excited, although some minor improvement could be realised..... I would not worry if it required any work to change.....




...............oztules

rossw:

--- Quote from: junglejoe39 on October 03, 2015, 03:57:02 pm ---the 5 in. voc is 21.60 and the 6 in. is 22.92

--- End quote ---

For extracting the most from your PV, V(oc) is much less important than V(mp) anyway.

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