SMC Networks Sunny Mini Central SMC 5000A - Manual (Page 33)

SMA Technologie AG Electrical Connection
Installation Guide SMC50A_60A-IEN073320 Page 33
Design Notes
Check the following points below:
Step Test
1 Do all the strings have the same number of series-connected modules?
2 How high is the maximum reverse current in a defective string at nominal
conditions?
Example: generator with 4 strings of modules at 5 A short-circuit current
The maximum reverse current is 3 x 5 A = 15 A.
3 Are the modules suitable for such a reverse current?
4 If not: Have appropriate measures been taken in order to avoid these
currents (e.g. string fuse in each string)?
5 Are the plug connectors of the modules and the inverter suitable for such a
reverse current?
6 Is the string wiring suitable for such a reverse current?