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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 | ||||
6(b) | 2 | 4 | 8 | ||||
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.
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