Step 4: Verifying Proper Power Optimizer Connection - SolarEdge SEK-I Series Installation Manual

26 Step 4: Verifying Proper Power Optimizer Connection
IMPORTANT SAFETY FEATURE
For a compliant PV Rapid Shutdown (PVRSS) installation, use no more than 30
Power Optimizers per string.
Enabling PVRSS from the inverter menu is only required if the installed Power
Optimizers were manufactured before 2015, otherwise it is enabled by default.
NOTE
The DC bus of each unit is separate and not shared for all units. Therefore, in
addition to following the inverter design rules, each unit should follow the
unit design rules as detailed in the Technical Specifications.
1. Connect the Minus (-) output connector of the string's first Power Optimizer to the
Plus (+) output connector of the string's second Power Optimizer.
2. To minimize electromagnetic interference (EMI), make sure to minimize the distance
between the positive and negative DC cables.
For detailed instructions, see:
https://www.solaredge.com/sites/default/files/se-emi-
performance-application-note.pdf.
3. Connect the rest of the Power Optimizers in the string in the same manner.
4. If you intend to monitor the installation, using the SolarEdge Monitoring platform,
record the physical location of each Power Optimizer, as described in Creating
Logical and Physical Layout using Installation Information on page 58.

Step 4: Verifying Proper Power Optimizer Connection

When a module is connected to a Power Optimizer, the Power Optimizer outputs a safe
voltage of 1V (±0.1V). Therefore, the total string voltage should equal 1V times the
number of Power Optimizers connected in series in the string. For example, if 10 Power
Optimizers are connected in a string, then 10V should be produced.
Three Phase Inverter with Synergy Technology P/N: SExxK-xxxxIxxxx SExxK-xxxxIxxxx
Figure 8: Power Optimizers connected in series