Degert

Hi Guthrum, I did not. I will check the last few months' worth of readings and post it on here.

To update, I've borrowed a CT from someone, and after 3 hours of testing, it seems to also be "out" compared to the municipal meter (although the meter only moved 0.39kWh, so I will give it more time). I will do the "resistive test" this weekend to test the meter. Any other suggestions as to what the cause could be would be appreciated.

@PaulinNorthcliff Shabir called me (at 22:00, colourful guy ) last night, and added me to a DEYE WhatsApp group with some overseas members. They dialled into the inverter and upgraded the firmware to V3.8.7.6 (3876, don't be jealous now). So now I've taken a reading this morning (31.01kWh used at meter, 71.4kWh according to inverter), and it will hopefully be accurate when I take another reading this afternoon. If not, I will have to get the installer involved.

The installer set me up as an owner, so I might just delete my profile and plant and start over. But the data still comes from the inverter, not the platform. @Achmat wow your readings are accurate. @YellowTapemeasure I have been exporting the data, that is how I've done all of my readings. I'll wait to hear back from Deye Technical Support, and I still need to do the resistive test (I also have one of those spinning meters).

I have tried using the Pro platform, but you have to set up a separate profile (I couldn't use my Solarman credentials). Then you had to set up a "new" plant, and I got blocked, as the logger "already belongs to another plant". Should I delete my Solarman plant?

I will see if I can do the "resistive test" as soon as I can find a clamp meter, thanks for the idea. I don't think the meter is faulty, as we use about 900-1300kWh per month, which I would think is high enough to not be under-measured.

Ok so I couldn't wait, and I put in a new cable for the CT. I twisted the wires myself, but there shouldn't have been any interference, as the wire was run along the ground, far away from AC cables. Inverter says I consumed 11kWh until now. I generated 6.1kWh, so municipal use should be 4.9kWh. However the meter changed by 2.86kWh only. Has someone else (perhaps with a DEYE/Sunsynk inverter) also tested to see if the data actually adds up?

@YellowTapemeasure Thanks for the info. They are sharing the same conduit, but the total length is around 4m. The twisted cable from the CT clamp is joined to normal/straight wires in the DB, and it then runs to the inverter box through a conduit. To test, I will braid my own wire and run it around a wall for about 10m total, as the conduit runs through a wall. I'll do it first thing in the morning, so I'll have a full day worth of data to compare.

Thanks for the details Paul. I've called and sent Shabir a message explaining my issue, and will let you know when I hear back from him. I have version 3854 installed...

So after 1 day's proper measurements (not fiddling with the clamp), this is what I got: Municipal energy used (meter readings): 16.2kWh Energy purchased according to inverter: 39.3kWh Energy generated + municipal energy: 34.7kWh Total consumption energy according to inverter: 56.1kWh Perhaps someone else could do the same exercise to compare? I am still waiting for Deye to respond about my firmware version.

I've sent them a mail thanks.

Hi Peter. That picture was from Achmat, showing how he solved his issue. My wires were correct from the get-go (on CT2), as you can see below. But who knows, maybe the gremlins will disappear after playing around with the clamp...

Thanks Achmat. I've changed the clamp back around, and checked that it is on CT-L2. So I am back where I began. I will monitor and post the results on Sunday. Here is what I have now:

Thanks PaulinNorthcliff and everyone else. I've now changed the clamp, but a different problem popped up. I am now generating 27W of power (impossible), consuming 0W, and exporting 1.1kW to the grid (so it's showing -1.1kW). My grid feedback is blocked (as set by installer, zero export to CT), and I've checked that the wheel/meter is not turning backwards. It was stationary and at times moving forward. I assume that the direction WAS in fact correct, and I now need to change it back?

Thanks all. It was actually plain to see (once I removed the clamp. The clamp has an arrow indicating the direction in which energy should flow. However, the installer probably found that the clamp was difficult to install the correct way around, so he just took the easy way out. I've managed to get the clamp out, but I'm struggling to install it again. I am sure that was the problem, but will give feedback later. Thanks a lot!