GreenWire was very excited to deliver this project ontime and under budget to our customer! This 50KW project was done in Roseville CA. The utility company was Roseville Electric which bar none is the best utility company to deal with during a solar installation. Their staff both in the rebate department and plan check department truly made this project flow.
GreenWire started with rebate forms, one line drawings and plan check. After quickly receiving all the approvals we ordered the SunLink self ballasting system, REC panels and SMA inverters. Once we received all the materials we cored a hole through the warehouse wall and set the main disconnect. Simultanuosly we began installing the side rails on the PV's and setting the ballast feet.
Main Disc and Wireway
Panels being Prepped
Roof Jack Penetration
We took care great care in the planning of our design with conduits through the roof. Instead of installing one 50KW inveterer it was decided to install nine SMA inverters. The strings came out perfectly balanced with two strings of twelve on each inverter. The nine inverters wired back to a common combiner sub panel inside the warehouse that passed through the wall to the main disc.
All nine conduits stayed completely seperated except where you see they passed through the roof. The were combined in a wireway and then seperated back out to nine conduits. This provided excellent redundancy in our design. The customer received nine solar systems perfectly balance on the three phase system. Yes, this cost us a few dollars more but the result was a perfect system!
SunLink Ballast System
Any construction project has it's challenges and this one was the same! Space. We found two adjacent walls in the warehouse that we could fit the nine SMA inverters and the sub panel. One wall is the one you see at the top that we cored out of to get outside to the main panel. This wall was made of 12 inch thick concrete and was no problem in securing the inverters with concrete anchors.
The adjacent wall was sheetrock with internal metal studs typical of new construction. Knowing that each SMA inverter weighs 80+ lbs it was decided to sheer the wall with 1 inch plywood. We set the plywood on it's side on the ground and then screwed it to the metal studs in a sheering method. This allows the weight of all the inverters to be transfered to the floor through the plywood. The plywood was painted the same color as the concrete wall. Each SMA inverter carried it's own ground, DC wiring and AC wiring totally seperate. The customer was very pleased with design and install. GreenWire truly puts time and effort into making each system the best installation we can!