PV array design for Sol-Ark 15k and Q-CELLS DUO L-G7.2 400

tcj2001

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Jul 11, 2022
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Based on the specs of Sol-Ark 15K and Q-CELLS DUO L-G7.2 400


How much Solar panel can go in at each MPPT, is it 8 in series and 2 set in Parallel for each MPPT
 

Samsonite801

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Oct 15, 2020
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Sol-Ark 15k PV Specs:
1658932888448.png

Panel Specs:
1658932955163.png

Panel temp coefficient of Voc (taken from that actual panel's data sheet):
Q_CELLS_Data_sheet_Q.PEAK_DUO_L-G7.2_385-405_2019-07_Rev01_NA.pdf
1658933509108.png

Calculator (I used -23° C as coldest temperature, you might need to adjust number for actual coldest temp in your area):
1658933059482.png

So 8 panels in series would have full string Voc of 442.44v (still under Sol-Ark max PV voltage of 500v), and with 2 strings in parallel would be Isc of 20.38a, which is below Sol-Ark Max DC Current per MPPT spec of 26a. So that would work fine to have 2 strings (using that model panel) into one MPPT input (Sol-Ark has 3 MPPT controller inputs).

Or can just put one string into each MPPT for 10.19a each.... Depends on how many panels you need to connect. If you only have < 24 panels, I'd just put one MPPT per string (requires more cable runs, but each string of 8 would have their own MPPT controller, or say for 48 panels, you can combine 2 strings near array with DC combiner and run each pair of strings for each cable run).
 
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