question

@duckman

It is the imp/isc that is giving you grief.

One tracker has protection up to 20A isc (short circuit). Two strings will go over that at 11A each.

You should ideally set up have one string per tracker. You can put both in one tracker there is a caveat, it is mentioned in the install manual, if you make mistake, it is not covered by warranty.

Hi and thank you for your reply,

In hindsight i would have sized the panels differently re imp/isc, i was too busy working hard to afford the equipment to properly look at the specs, doh!

I`m looking at possibly using 9 in series on one tracker, the BP 180`s as before on tracker two, it will test my engineering to make it trackable, but that is what life is about?

9 in series however results in a potential float voltage issue of 416.8 divided by 8 = 52 thus exceeds my float of 51, though the chances of requiring float on a winters day is zero, plus cabling is in excess of 30metres so there will be some voltage drop

You have confirmed for me the issue re short circuit and warranty, thanks,

I also now have the annoyance of the mppt calculator navigating toward the 48/6000 instead of allowing me to experiment with the parameters of the 450/100, perplexing

I need to re-read (again) the notes given by Guy Stewart under the topic Rs solar 450/100 spec sheet confusion.

Connecting reverse polarity is not something i am likely to do and for sure i only intend doing the engineering 1 time

The trackable arrays i make do allow for adapting for peak solar and leaving the 2 arrays at diverse compass points in peak weather conditions...

Thanks again, your reply is allowing me to evaluate this more clearly