This is a continuation of This post. I'm going with a 48 volt system, and have purchased my first MPPT/Inverter.
I'm going to purchase These panels.
The question is, how many do I need, and what configuration do they need to be in. I'm going to Attempt to go over the math, and any help you guys can give is awesome, you guys have been helpful thus far.
So, using the guidelines laid out in This video, looking over the manual, (Data Sheet on Manual pg53) along with an email I've gotten from the manufacturer; I'm getting the following:
1: Battery Bank Nominal
48 Vdc
2: Max PV Input Voltage
250Vdc of PV at each MPPT port. Minimum of 90Vdc
3: Max PV Input Wattage
3000 Wp per MPPT
I want to use These panels, if I can. Hopefully I can. They're both good panels, and cheap!
Rated Power: 250W
Open circuit voltage (VOC): 37.6 V
So 2 questions at this point
1: Is my understanding/math correct?
2: Is a cushion of the 24 VOC enough to account for the winter increase in Northern California, where historically the winter temperature is typically 28°F (-2.22C), but doesn't go below 18°F (-7.77C)? According to This Website anyway.
I'm going to purchase These panels.
The question is, how many do I need, and what configuration do they need to be in. I'm going to Attempt to go over the math, and any help you guys can give is awesome, you guys have been helpful thus far.
So, using the guidelines laid out in This video, looking over the manual, (Data Sheet on Manual pg53) along with an email I've gotten from the manufacturer; I'm getting the following:
1: Battery Bank Nominal
48 Vdc
2: Max PV Input Voltage
250Vdc of PV at each MPPT port. Minimum of 90Vdc
3: Max PV Input Wattage
3000 Wp per MPPT
I want to use These panels, if I can. Hopefully I can. They're both good panels, and cheap!
Rated Power: 250W
Open circuit voltage (VOC): 37.6 V
1 Series String | +1 parallel string |
3 in Series = 112.8 VOC | 750W | 3 additional panels; 6 total; 3S2P = 112.8 VOC | 1,500W |
4 in Series = 150.4 VOC | 1000W | 4 additional panels; 8 total; 4S2P = 150.4 VOC | 2000W |
5 in Series = 188 VOC | 1,250W | 5 additional panels; 10 total; 5S2P = 188 VOC | 2,500W |
6 in Series = 225.6 VOC | 1,500W | 6 additional panels; 12 total; 6S2P = 225.6 VOC | 3000W |
So 2 questions at this point
1: Is my understanding/math correct?
2: Is a cushion of the 24 VOC enough to account for the winter increase in Northern California, where historically the winter temperature is typically 28°F (-2.22C), but doesn't go below 18°F (-7.77C)? According to This Website anyway.
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