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Hello solar community,
I'm in the fun design phase of preparing for a solar array for summer 2016. I have a few questions that will shape which direction the system goes. Questions:
DC voltage 600 or 1000?
Our AHJ has adopted 2014 NEC. I believe this allows us to build a system up to 1000V. Base on this and the fact I'm planning a ~24.9KW system + I know equipment rated at 1000V is just hitting the market this may or may not be feasible. Can any one share rumors of 1000V single phase inverters that will hit the market in the next 12-18 months? I basically would like the SMA Tripower 24000TL-US in single phase...
Panels- eyeballing the LG315N1C-B4 qty 78 if I go with a 600V system. Anybody have pricing or rough ball park on these newer panels? I did the low temp/high voltage calc and these panels are perfect when mated with the SB7700TL-US-22 x 3 for our climate. If 1000V is viable I would probably go with 4 strings of 20 (310W panels to keep it under 25KW due to POCO politics... I mean requirements).
Disconnects:
I see several manufactures of combiner/DC disconnects boxes that I will install near the array. Given the long distance between the array location and the inverter (basement 325' away for thermal control) would I need any additional DC disconnects near the inverter? If not code is it wise to add another disconnect near the inverters?
I should mention this will be a ground mount system. No shade issues unless the corn grows another 10' but with GMO that might be an issue in the future -
I'm in the fun design phase of preparing for a solar array for summer 2016. I have a few questions that will shape which direction the system goes. Questions:
DC voltage 600 or 1000?
Our AHJ has adopted 2014 NEC. I believe this allows us to build a system up to 1000V. Base on this and the fact I'm planning a ~24.9KW system + I know equipment rated at 1000V is just hitting the market this may or may not be feasible. Can any one share rumors of 1000V single phase inverters that will hit the market in the next 12-18 months? I basically would like the SMA Tripower 24000TL-US in single phase...
Panels- eyeballing the LG315N1C-B4 qty 78 if I go with a 600V system. Anybody have pricing or rough ball park on these newer panels? I did the low temp/high voltage calc and these panels are perfect when mated with the SB7700TL-US-22 x 3 for our climate. If 1000V is viable I would probably go with 4 strings of 20 (310W panels to keep it under 25KW due to POCO politics... I mean requirements).
Disconnects:
I see several manufactures of combiner/DC disconnects boxes that I will install near the array. Given the long distance between the array location and the inverter (basement 325' away for thermal control) would I need any additional DC disconnects near the inverter? If not code is it wise to add another disconnect near the inverters?
I should mention this will be a ground mount system. No shade issues unless the corn grows another 10' but with GMO that might be an issue in the future -