...
Stack | Length | Width | Total cells | |||
|---|---|---|---|---|---|---|
1 | 7 | 3 | 21 | |||
2 | 7 | 3 | 21 | |||
3 | 2 | 6 | 1812 | |||
4(a1) | 5 | 2 | 10 | |||
4(b2) | 5 | 2 | 10 | 5(a) | 25 | 10 |
6(a) | 1 | 4 | 4 | |||
7 | 7 | 4 | 28 | |||
8 | 7 | 4 | 28 | |||
9 | 7 | 4 | 28 | |||
10 | 7 | 4 | 28 | |||
11 | 4 | 4 | 16 | |||
12 | 4 | 4 | 16 | |||
13 | 7 | 3 | 21 | |||
15 | 7 | 3 | 18 | |||
16 | 7 | 3 | 18 | |||
Total | 259 | |||||
The nominal battery voltage is 129.6 V with a maximum of 151.2V. Each Nomura MPPT has a maximum boost voltage of 33V. 151.2/33 = 4.58. Taking ceil(4.58) we get 5 which means we need at least 5 MPPT’s in one string.
According to the Maxeon Gen 3 Datasheet, under Standard Test Conditions, we should get (0.632 V * 5.89 A) 3.722 W of power from each cell. We assume (because manufacturer’s lie and connection impedances) that the actual output of each cell is 75% of that which is given in the datasheet which means we are getting 2.79 W of power per cell.
(To be continued)