Overload Capacity

The Sunny Island is optimized for both thermal- and electrical overload conditions. It adjusts the maximum power directly to the ambient conditions.

With the patented OptiCool cooling system, SMA Solar Technology AG offers a technical solution that combines both passive- and active cooling together. The intelligent temperature management system comprises of a two-chamber system with a water-tight area for the electronics and an airflow-ventilated area with the relevant heat sources. This ensures exceptional protection with extraordinary overload behavior and the greatest level of reliability.

In the event of high inrush currents, soft start functions are activated: The Sunny Island 6.0H/8.0H can supply a current of 120 A for 60 ms. The inverter supplies overcurrent at a magnitude of 2.5 for up to 3 s. Only then – for example in the event of a permanent short circuit – is the device disconnected for safety reasons. 16 A circuit breakers with B characteristic are triggered within 100 ms, also satisfying the safety requirements of grid-parallel installations.