Max DC Input is 35 kW. This inverter weighs hundreds of pounds less than competing central inverters, and it can be wall-mounted either indoors or outdoors (NEMA 3R) (no need to pour a pad); 2 guys can move and mount it. Its CEC Weighted efficiency is 96%, with peak efficiency of 97+%. Note the integrated switch gear--a $ saver. Also, bi-polar arrays have inherently superior ground-fault detection because this inverter constantly compares the voltage in the matched sub-arrays. Check out the YouTube video from SPI. The Europeans have been using bi-polar, transformerless inverters for years. Worth taking a hard look.