I have a 26 solarpanels, en 3 strings of wire running to the setup.
I put all variables in the mppt calculator, wich i thought was ok to put 2 strings parallel, according to the calculator.
However, i dubbelchecked with my supplier, who states it cant be done, as the max mppt current is too high, and it can damage the tracker.
Did i interpret the calculator wrong?
Dont know - what are you panels?
Datasheet?
Did you adjust for temperature compensation?
On face value, one string per tracker would be fine on a 450\200 the parrallel one above the recommended isc total.
I would not parallel strings on a tracker, why do that when there are 4?
The datasheet and the manual recommend less than 20A ISC total
If there is a mistake - no warranty.
hmm, so there seems to be an issue with the mppt calculator indeed:
In the link of @jee, his 3rd array is a 6x2 with 9.81 Impp / 10.33A Isc each - and the calculator is proposing the SmartSolar MPPT RS 450/200-MC4 even if that would exceed the 16A/20A Ratings in the datasheet.
ps.: The link doesn’t enable “Advanced Panel settings”, but the values used are preserved, it seems:
Its all in the link, see string 3.
There are only 3 strings of wire going to the installation, no possibilty to add anoher string.
So can only connect 3 sets of wire, 3 trackers. Splitting the wires at tracker 3 and connect them to tracker 3 and 4 to split the loads evenly is not an option if i am correct?
Worst case i remove some panels from the roof.
You can have unequal strings on each tracker as long as you dont break the 450v input 8x float and isc.
Oh well. That throws the proposal out the window.
