It's my understanding that for solar there needs to be an outside disconnect available to cut power to the inverter, and that if the inverter is located inside there would also need to be another disconnect there. With NEC 2020 requiring a full service disconnect outside, I'm curious if that would satisfy the outside inverter disconnect requirement as well?
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That's going to depend a lot on what your local inspector wants to see.Powerfab top of pole PV mount (2) | Listeroid 6/1 w/st5 gen head | XW6048 inverter/chgr | Iota 48V/15A charger | Morningstar 60A MPPT | 48V, 800A NiFe Battery (in series)| 15, Evergreen 205w "12V" PV array on pole | Midnight ePanel | Grundfos 10 SO5-9 with 3 wire Franklin Electric motor (1/2hp 240V 1ph ) on a timer for 3 hr noontime run - Runs off PV ||
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Originally posted by telero View PostIt's my understanding that for solar there needs to be an outside disconnect available to cut power to the inverter, and that if the inverter is located inside there would also need to be another disconnect there. With NEC 2020 requiring a full service disconnect outside, I'm curious if that would satisfy the outside inverter disconnect requirement as well?Comment
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Originally posted by Mike90250 View PostThat's going to depend a lot on what your local inspector wants to see.
Originally posted by nwdiver View Post
Every AHJ I've dealt with requires a 'visible' and 'lockable' AC disconnect. You need to be able to open the disconnect and visibly confirm the circuit is broken so a breaker or switch won't work. Something like a square D 'DU221RB' should work.Comment
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Having a disconnect within sight (50' max) of the inverter is in the code, but AHJs around here never have required it when the inverter is inside the house. Our utility has always required a lockout AC disconnect on the outside near the service, but no one does a second one. I suppose the 2020 code is going to solve another non-existent problem...
Be aware that some AHJ's don't go for SQ-D DU222RB disconnect because the fine print on the label says that it is only listed for use with overcurrent protection fuses and not breakers. Best to use an Eaton DG222URBBSEE, R11, NABCEP, Chevy BoltEV, >3000kW installedComment
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Originally posted by telero View Post
This would be a 12kW solar, ideally line side tap. Pretty sure I'd need a 60A disconnect.
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