Hi
I am pretty sure this is an east one, but I want to be extremely sure about it.
I just bought a Victron MPPT 150|60 -tr controller
I've read the manual and I know a couple of things:
1. 150VOC is a hard limit, I cannot exceed this by any number or I risk burn down the controller
2. at 24v system my Nominal PV power would be 1720W
so, knowing this, I am using this type of panels
Pmax 455W
VOC 49.8V
Vmp 41.2
lmp 11.05
lsc 11.6a
for sure I am installing 2 units of 455w panels in series, so I would have 910W and 99.6VOC, this is a very safe bet regarding the max VOC of 150 in the MPPT Controller. But I think this controller would be under utilized.
so, here lie my issues:
I cannot use 3 panels in series because, even though I would have 1365W and this is way under the 1720w max, and it wouldn't be a problem, VOC would be 149.4VOC which is dangerously close to the 150VOC max, and , even though in my region we do not have temps under the 16 Celsius, it's still too risky and I won't do that.
In that circumstance, I have to go the next scenario
String # 1
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC
String # 2
2 panels of 455W and 49.8VOC in series = 910W and 99,6 VOC
The I would parallel both strings having 1820W and 99.6VOC, I still comply with the 150VOC max of the controller, but the max watts goes 100W over
My question to you experts of Victron, would the 1820W damage my controller or I would be good doing so? I know I probably won't get anything near to that since no panel is 100% efficient, but i want to be double sure.
thanks in advance
