Layer | Category |
|---|
In consideration | Reference | Small | Medium | Large |
|---|
\(V_{S}\) | 1 | 120 | – | 180 | 500 | – | 750 | 1200 | – | 1500 |
\(V_{Y}\) | \(V_{S}\) | 1.5 | – | 3 | 1.5 | – | 3 | 1.5 | – | 3 |
\(V_{C}\) | \(V_{S}\)a | 10 | – | 20 | 10 | – | 20 | 10 | – | 20 |
\(V_{R}\) | \(V_{C}\)b | 3 | – | 8 | 3 | – | 10c | 3 | – | 10c |
\(V_{I}\) | \(V_{S}\) | \(\vert {V_{I}} \vert\) | = | 1 | 200 | – | 300 | 200 | – | 300 |
\(V_{T}\) | \(V_{I}\) | \(\vert V_{T} \vert\) | = | 1 | 1 | – | 3d | 1 | – | 3d |
- aIn the example solar farm by ABB (ABB Ltd. 2019, Annex B), each combiner box connectes 13 or 14 strings. A combiner box by LS Electric has possible inputs of 12, 16, or 20 (LS ELECTRIC Co., Ltd. 2021). Combiner boxes by SMA connect up to 32 strings, but no recombiner boxes are used (SMA Solar Technology AG 2020)
- \(^{\text{b}}\)Based on the recombiner boxes in SolarBOS, Inc. (2022)
- c10 or \((26-\text { ratio } V_{C}: V_{S})\), whichever is lower, based on the idea that parallel connections of many strings in both combiner and recombiner boxes yields excessive amounts of electric current
- dAn example of two inverters connected to a transformer can be found in Gajda (2022)
