I have been observing my VM-3P75CT on a single-phase system (my house with a solar system) for some time and starting to wonder about its accuracy in low current situations. It almost never gives a reading much below 2A (import or export) even when power is well under 200W (on a 240V grid). When I…

Hi @Dunnp , it’s the same explanation as @wjmb links to. Added below for completeness. [image] Incorrect Current Reading in the Grid Box of VRM Q&A and troubleshooting At near zero real power, the power factor also tends to go to zero. It’s hard to say where th…

Thank you for the explanation Luc and @wjmb . As long as the power (W) reading is accurate and reflects what I’m paying for/getting paid for, the current (A) is fairly irrelevant at low values. For interest, is there any scope to lower the current threshold? Or will noise/harmonics get in the way? …

Hi @Dunnp , what do you mean with lowering the current threshold? Regarding the power gauge in VictronConnect, I can reproduce this behaviour and I notified the VC team.

You say if the power is +1W, show +2A and for -1W, show -2A. What I meant was whether the +/-2A reading can be made smaller and closer to the actual current? Or better still, can it be calculated (W/V) to display the correct current (presuming the watts reading is correct)? On VC, there is anothe…

Hi @Dunnp , the 2A is the actual current that the wires have to carry. A value close to 0A wouldn’t represent a physical value, and is something we won’t implement. I agree that it isn’t really nice to look at though those flip-flopping values though :wink: The only real way to lower that value is to…

Hi Luc Neutral current issue: [IMG_5623 (002)] Above is a direct VictronConnect local connection. Neutral current equals L1 current. As it should. [image] This is a VC-Remote connection (via VRM). It initially shows the correct Neutral Current (5.1A) then after a short (but random) time (s…

Hey Luc, This morning the power gauge in VC is now working much better, not limited to 100W. Some nice work in the background?? (Still no negative readings though). Thanks for your help. Phil.

VM-3P75CT gives odd/wrong current readings below 2A

DIY

wjmb September 12, 2025, 5:21am 2

I noticed the same and stumbled across the explanation given here: Incorrect Current Reading in the Grid Box of VRM - #4 by Luc

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VM-3P75CT gives odd/wrong current readings below 2A

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