TheFlumph
New Member
I've got 60 300w panels I'm trying to fit in my 18kpv. This is the best I could come up with. This is my first system, I would appreciate some double checking. Im mainly concerned about my plan for mppt1. 2 and 3 look plenty good I think.
Thanks!
string plan for 60 panels and EG4 18kpv
Panel Specs
Hyundai Hia-S300hg
300w
Voc 39.25v
Isc 9.77a
Vmpp 32.15v
Impp 9.33a
Temp coef of Pmax -0.417
Temp coef of Voc -0.306
Temp coef of Isc +.046
Coldest temps in my area -35C
max panel voltage at lowest temp- 46.5
MPPT 1 -25 amp limit
string 1
12 panels in series-
557v
9.77a
string 2
12 panels in series-
557v
9.77a
string 3
12 panels in series-
557v
9.77a
-three strings into parallel at combiner box equaling-
557v and 29.3a which is under the 600v limit and over amps by 1.2x
MPPT 2 -15 amp limit
string 4
12 panels in series -
557v
9.77a
MPPT 3 -15 amp limit
string 5
12 panels in series-
557v
9.77a
Thanks!
string plan for 60 panels and EG4 18kpv
Panel Specs
Hyundai Hia-S300hg
300w
Voc 39.25v
Isc 9.77a
Vmpp 32.15v
Impp 9.33a
Temp coef of Pmax -0.417
Temp coef of Voc -0.306
Temp coef of Isc +.046
Coldest temps in my area -35C
max panel voltage at lowest temp- 46.5
MPPT 1 -25 amp limit
string 1
12 panels in series-
557v
9.77a
string 2
12 panels in series-
557v
9.77a
string 3
12 panels in series-
557v
9.77a
-three strings into parallel at combiner box equaling-
557v and 29.3a which is under the 600v limit and over amps by 1.2x
MPPT 2 -15 amp limit
string 4
12 panels in series -
557v
9.77a
MPPT 3 -15 amp limit
string 5
12 panels in series-
557v
9.77a
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