3 MPPTs for versatile adaptions to different layouts. 6 strings intelligent monitoring and fast trouble-shooting. Power Line Communication (PLC) supported. Max. efficiency 98.6%. CEC. efficiency 98.0%. DC AFCI compliant to UL 1699B Type I. Type II surge arresters for both DC and AC. Residual Current Detection (RCD) protection. Natural cooling technology. Fuse free design. Protection rating of NEMA Type 4X.