SUNNY BOY 2500 / 3000 - Installation Guide - Sinetech

SMA Solar Technology AGOverview of devices3.4 Electronic Solar Switch (ESS)3.4.1 DesignThe Sunny Boy is equipped with the integrated electronic DC load-disconnecting switch ESS. Thisreliably prevents the arcing that usually occurs when disconnecting the inverter from the PV generator,which can cause personal injury and may damage the inverter connections. To access the DC inputplugs in order to safely disconnect the PV generator from the inverter, you only need to pull on a griphandle on the underside of the inverter.Disconnecting the inverter thus becomes a three-step process:1. Disconnecting the AC side2. Pulling off the Electronic Solar Switch handle3. Disconnecting the DC plug connectorsDANGER!Danger to life due to unsafe disconnection from the PV generator!• Safe disconnection from the PV generator is only guaranteed after removal of theElectronic Solar Switch, and of all DC plug connectors.DesignThe Electronic Solar Switch consists of a handle on theunderside of the inverter and an assembly inside theinverter.A handle is mounted on the underside of the inverterwhich covers the PV generators connectors.A plug is inside the handle. The Electronic Solar Switchsconnector is only visible once the handle has been pulled.The connector is fitted in the handle as a floatingconnector, so that the handle does not catch when beingpulled from the inverter.Electronic Solar Switch handlePlugNOTICE!The Electronic Solar Switch can be damaged if it is inserted incorrectly!• Do not tighten the connectors screws. Otherwise, safe disconnection can not beguaranteed.Installation Guide SB25_30-IEN083212 13