151 2nd Street Solar Installation



This system consists of 177 Suntech 190W panels, 3 SMA SB9000TLUS transformerless inverters and 12 Enphase M190 microinverters. Each SMA inverter is fed by 5 strings of 11 panels. 5*11*3=165 panels are connected to string inverters, 12 panels with minor partial shading issues are on microinverters.


SMA inverter monitoring


Enphase microinverter monitoring


Construction and Solar Array photos

Just click on the pictures to see the full size version.

Layout of the 177 panels, electrical, mechanical, and structural


Base plate attachment using threaded rods to the load bearing wall


Finished baseplate


Ledger board on the parapet wall


Finished steel frame structure


First 2 panels with two of the 12 Enphase microinverters


SMA string combiner


3 SMA transformerless string inverters, DC disconnect is underneath each inverter


Inverters, breaker panel, aluminum solar mounting rails at a 10 degree angle


AC disconnect in basement electrical room


Solar panels partially installed


All 177 panels installed, looking west


Solar array, looking east


Array along the north parapet wall


Panels over elevator bulkhead


View with the inverters


Communications box with SMA Webbox and Enphase Envoy monitoring systems


View looking north-west



Thanks to everyone helping make this solar project a reality !

Last Changed : 11/17/2011 Jochen Spengler