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Forum Index : Solar : On Grid Solar
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| stef123 Regular Member  Joined: 25/09/2024 Location: United KingdomPosts: 83 |
Hi, i was running for a while an off-Grid Solar System (290 Watts) with a small LiFepo4 Battery and some self-build electr(on)ics in to switch automatically between Grid and Battery, i stumbled over a new Deye SUN600-G3-230 for a small price. So i connected two of my 100 Watts Solar cells in series in order to get within the MPPT-Range (25-55 Volts) of the Grid Converter, plugged it into the Grid and by measuring, the best i got out of this was 100 Watts on full Sunshine - which i consider as rather low. Thats one of my problems. The Second one: My three-phase Meter with a bidirectional counter (it has the correct symbol on the case, which identifies it as that), adds the generated power to the current power consumption, which is of course incorrect. Idk if it plays a big role in this case, but i assume that the Inverter is running on a different Grid Phase than the majority of consumers in my apartment. Why I think that? Well, the balcony outlet, to which the inverter is connected, is protected by the bedroom fuse. A few other, smaller rooms in the fuse box are summed up in a row and being protected by a single ground fault circuit interrupter. The other rooms with the main consumers are protected by a different ground fault circuit interrupter; so I believe that two different phases are being used here. The question I'm asking myself, however, is whether a current raise in one (in this case probably otherwise unused) phase due to the feed-in leads to a measurement error in the meter. I am running the Meter model 2R06-DTA-ODZ1 dd3_meter.pdf It is configured as a two way meter (without "backstop"), but is it common that produced energy will flow into the grid, only because of a different phase, and being - added - to the power consumption?? Thank you & best regards ! Stef Edited 2025-04-05 22:41 by stef123 |
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| stef123 Regular Member Joined: 25/09/2024 Location: United KingdomPosts: 83 |
Well, same issue on the Phase of the other rooms. Inverter goes into the socket, consumers are connected by another socket in the same room on the same cable, power meter wattage rises up instead of going down. In this case i would rather think that the wattage being produced would rather go straight into the consumers, instead of being seen by the meter. So i start to think that the Deye itself has some serious issues. |
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Revlac Guru  Joined: 31/12/2016 Location: AustraliaPosts: 1112 |
Hi, I'm not familiar with these type of inverters, but the working principal should be like any other GTI, seems a bit odd that the meter is reading more, is it worth connecting the Wi-Fi APP to see any errors etc? Cheers Aaron Off The Grid |
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| noneyabussiness Guru Joined: 31/07/2017 Location: AustraliaPosts: 526 |
Sounds like your base wiring in the house is all wrong, without having it in front of us or at least some really detailed photos of what where dealing with... an Eleccy will help you with that... I think it works !! |
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| Godoh Guru Joined: 26/09/2020 Location: AustraliaPosts: 498 |
Hi Noneya, from what I read, Stef is living in a block of flats, and just plugging the inverter into powerpoint. Definitely would not go down well in Australia. So the way they have it connected could mean that they are feeding into one phase of a three phase system, and the meter is reading the imbalance as an import. It would not be a way to do a grid connect that I would suggest. I am sure here the supply authorities would frown upon it. Pete |
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| Davo99 Guru Joined: 03/06/2019 Location: AustraliaPosts: 1582 |
First thing is solar is never 100% Efficent. You will only get rated power at 12 Pm in summer at the equator. That's what the reating is supposed to represent and even then it's still embellished because it's a flash rating. They use a flash light source in the testing because as panels heat up above 25C, the output falls off. I have measured panel temp down to 5C in sunlight and the panels were still well above 25C and on a decent day in summer here in Oz, they can go over 80. The other thing is, those 100W toy panels are notorious for being over rated. If you bought them from fleabay or the like, pretty much gauranteed. In any case, I wouldn't expect to get near rating out of them if you are in the UK. Some meters can be programed for Bi-directional or only single. They are usualy single direction only unless the bi-directional ability is enabled by the power co. There is a bunch of things some electronic, NON- smartarse meters can do but have to be programed to enable the function. You could look the meter up and see what you can find in the spec sheet but that well may be it. |
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