AC Cabling of the Inverters
AC cabling among the inverters (left = last inverter; right = first inverter)
Requirements:
- For fusing purposes, use at maximum a 16 A circuit breaker.
- No loads must be connected between the individual inverters.
- For the AC cable connection to the Sunny Boy, only use the AC cable recommended by SMA Solar Technology AG ( > Spare Parts and Accessories).
- To allow for greater distances between two inverters, use the AC field plug ( > Assembling the AC Field Plug).
Procedure:
- Ensure that the circuit breaker is switched off and that it cannot be reconnected.
- Make sure that the PV modules are covered.
- Plug one end of the supplied AC cable into the outer AC pin connector of the last inverter of the PV system.
- The plug snaps into place.
- Plug the protective cap into the middle AC pin connector of the last inverter.
- The protective cap snaps into place.
- Seal the protective cap, if necessary. Make sure that the AC cable of the last inverter is plugged into the outer AC pin connector. Only the middle AC pin connector can be used for the security seal since it is the only one having eyelets for the security seal.
- Ensure that the AC connector and the protective cap in the inverter pin connectors are securely in place.
- Plug the other end of the AC cable into the middle AC pin connector of the next inverter.
- The plug snaps into place.
- Connect further inverters following the same procedure.
- If necessary, use AC field plugs to bridge greater distances ( > Assembling the AC Field Plug).
- If necessary, additionally ground the inverters ( > Connecting Additional Grounding).
- Connect the free end of the AC cable of the first inverter to the Sunny Multigate ( > Connecting the First Inverter to the Sunny Multigate).
DANGER
Danger to life due to electric shock
Do not disconnect the AC connectors under load.
