Originally Posted by Ben3361
Not well versed but from what I read on the net I would do;
(3 times) 2 in series @ 81.6Volts
and then parallel the 3 for 29.43 Amps
Does that sound OK or should I do it differently?
Sounds fine to me. I run 2S5P (soon 2S10P).
Originally Posted by john61ct
The ideal for handling possible shade issues is one panel per SC.
Cost wise, this approach might work well as well. The minimum charge controller you will need is 100V/100A, because although you have up to 81.6V 29.43A going IN (from solar), you will have up to 24V 100A going OUT (from the solar charge controller to the batteries).
Victrons are nice, however that's an expensive proposition ($785):
If you go with three Victron MPPTs, you can save a little bit of cash ($226.30 * 3 = $678.30):
Each one of your series strings would get a charge controller, and like john mentioned this can actually be more efficient depending on how panels are shaded.
When I move from 2S5P to 2S10P I'll be getting a second Victron 250V/100A MPPT.