I think yes, but this should only small adjustments. The CTs are serial products, but the minimal production tolerances will be corrected in the VM3 CT port interfaces. So I think. The measuring range of the CT is huge, it has to measure very small currents as well as quite large ones.
You can open two tabs in your browser, one with the gui page of the MPs and the other tab with gui page of the VM3. Then make some load tests with a defined consumer, water cooker, 100W old lightbulb… So you see live the values in both devices.
Yes, this illustrates how I generate energy from nothing :), right now for charging my car with 9A: not much seems to come in from the grid on the VM on the right, but the MP2 has >2000W on L1.
See what happens with a (temporary spare) CT from your second VM3 you will get soon.
VM3 measurement problems were often discussed here and the cause were mostly not fully “clicked” clamps, wrong phase cable assignment or damaged clamps. (See the topics shown down this webpage. For example: Victron VM-3P75CT Energy - wrong power number - any idea? - #3 by Luc )
I also found the simple reason why the first sensor doesn’t work: the lower magnet ring has gone missing in parts (don’t whether I broke that out by dropping the thing or it is a malproduction).
Thank you for the reply and the detail photo.
Nice to hear that your VM3 is now running fine.
A broken ferromagnetic core causes magnetic flow loss so the measured value is always to low.
What is the price for a single CT as spare part?
Your new VM3 should get his original CTs. Your spare CT should be used with your old VM3. So the new VM3 will produce best results. The old one can have a tolerance but it should be very low.
