Hello, I've been reading discussions on this forum for a while, but this is my first time posting here. I'm planning a ground mount 16.2kW system:
Thank you in advance for your advice and guidance.
- 36 450W Bifacial Znshinesolar panels (4 strings of 9 panels in series) - specs attached
- 2 Sol-Ark 12Ks parallel stacked (as shown in the attached wire diagram from the 12K Manual)
- Manual Bypass Transfer Switch - Siemens General Duty Double Throw 200 Amp 240-Volt 2-Pole Non-Fusible Safety Switch
- ReadyRack ground mount racking with ground screw foundation
- Ground mount about 150' west of the house.
- PV wire, direct burial rated in 3/4" Schedule 80 PVC conduit with 2 current carrying 10 AWG conductors + 1 ground conductor (6 AWG bare copper or will 10 AWG do?) in each conduit. Thinking one conduit per string. Can all DC wires and ground conductors be in one large (2") conduit? Does each string need its own ground conductor going back to the house, or will one ground conductor bonded to all the panel frames and racking do?
- 150' long trench 18" deep
- 2 IMO 25A DC disconnects (each IMO can handle two incoming DC strings)
- 4 Square D QO200TR 60A AC disconnects for the 2 outputs of the Sol-Ark 63A Grid and Load breakers (x2)
- 1 Square D D324NRB 200A Fused Disconnect. Instead, should I use a 200A knife blade disconnect with two 60A breakers to feed the Sol-Ark like an electrician friend suggested?
- 30kW EG4 battery bank but it is not UL listed, so initially this will be just grid-tied w/o battery backup.
Thank you in advance for your advice and guidance.