MPPT configuration vs efficiency

[marcodelbino (marco)]

Hello,

I would like to expand my current solar installation, 2 rows of 6x 475W panels, Multi RS Solar 48/600.

I would like to add another 12x 475W panels, to be split between 6x facing est and 6x facing west.

According to the MPPT calculator, I can either wire them:

1. 6x in series, 2 times, wired to ONE Smart Solar MPPT RS 450/100, separate tracker each;

(Picture above 2x)

2. 2 strings 3x in series, 2 times, each wired to a SmartSolar MPPT 150/45;

3. 4 strings 3x in series, wired to ONE SMartSolar MPPT 150/85.

Solution 1 is I think the best, as there is a separate tracker for Est and West, and a higher voltage. But it is also around 1k more expensive.

Solution 2 and 3 are price-equivalent. I would think having a separate MPPT (tracker) for Est and West would be better, therefore solution 2 would be better than 3?

Is the extra cost of solution 1 worth it?

Can anyone comment on if this reasoning makes sense and how big a difference, if any, do these different configurations have?

Thanks in advance!

Marco

[lxonline (LX)]

The second option is better.

@marcodelbino

Multi RS Solar 48/600.

This is an inverter and mppt.

Your two examples use panels of different voltage and amps is that correct?
The figures dont make sense either..
23x8 is 184watts so can’t be the 475watts you are talking about.
Maybe just post the actual panel values you are considering.