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SMA 10kW inverter DI converter fault mystery
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Anyways, what is the ground at the meter for? Is it bonded to the neutral in the meter box? If the meter box is considered the main disconnect then it should be. If it is then the neutral and ground should not be bonded in the main panel. The point of all this is to provide a path of least resistance. If you have varying paths of resistance to ground voltage on the neutral could be traveling in different directions including energizing the grounds.Last edited by Markyrocks69; 08-27-2019, 02:01 PM.Comment
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Ya but how exactly does that provide over current protection to the run of wire between the meter and the main panel?
Anyways, what is the ground at the meter for? Is it bonded to the neutral in the meter box? If the meter box is considered the main disconnect then it should be. If it is then the neutral and ground should not be bonded in the main panel. The point of all this is to provide a path of least resistance. If you have varying paths of resistance to ground voltage on the neutral could be traveling in different directions including energizing the grounds.
I think the ground is just grounded with a ground rod at the meter...Comment
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9 kW solar, 42kWh LFP storage. EV owner since 2012Comment
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Saying the ground is just grounded with a ground rod isn't the answer I'm looking for. What is the point of it? What does the other end go to? If that rod is bonded to the neutral and the main is grounded by another rod and the neutral and that ground are bonded and the only thing connecting the 2 sets of rods is the neutral then theres all kinds of issues there. The whole point of the way the code is setup is so that voltage on the neutral travels from branch circuits to the bus and back up the pole in a straight shot. If you have heavy loads in the main panel and varying resistance in different directions that voltage could be traveling to places that it's not supposed to. And that is precisely what your problem seems to be. When these errors are occurring is this a heavy electrical usage time of day? Dishes being done, showers, coffee, making breakfast ect?Comment
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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 ||
|| Midnight Classic 200 | 10, Evergreen 200w in a 160VOC array ||
|| VEC1093 12V Charger | Maha C401 aa/aaa Charger | SureSine | Sunsaver MPPT 15A
solar: http://tinyurl.com/LMR-Solar
gen: http://tinyurl.com/LMR-ListerComment
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Apparently the nec doesn't specify a distance but if you Google it it varies slightly from place to place but most people are saying 6 ft. Apparently this is up to the discretion of the local inspector. Basically the code says the main service disconnect needs to be outside and accessible or inside at the closest point of entrance. 2 totally contradictory statements but whatever. Again I'm just trying to get the actual problem. The distance really isn't the issue.Comment
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I might be misremembering some stuff. Thinking it over further I think there's actually a 'main' panel at the pole under the meter that feeds the shop and the house. So the panel at the pole would really be the 'main'. I thought the ground and neutral were bonded in the house.... I'll have to text him... could this cause intermittent faults?Comment
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It's difficult to find a solution to a problem since SMA didn't give a very good explanation of the fault and corrective measures. Two consecutive firmware updates (knock on wood) solved my nuisance arc fault issues, but could an unknown firmware update be causing the TL issues?
Why am I bringing up firmware? Because by default, SMA sets auto firmware update to YES. Inverter variables might get changed during these firmware updates. I had a Level 3 SMA tech tell to turn Auto Update to NO once my system was stable.
Just throwing it out there.Comment
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