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CT clamp direction battery only storage, no PV.

Posted: Mon Apr 14, 2025 5:01 pm
by Bash
I am part way through installing battery only storage, to utilise cheap rate overnight electricity and discharge the battery during the day.

The inverter I have installed is the Solis AC-Coupled S6-EA1P6K-L and will be pairing this up to a Seplos V4 Kit from Fogstar once I have built it.

My question is around the direction of the Eastron CT clamp that is supplied with the Solis inverter.

I have installed the CT clamp on the incoming live wire from the grid, pointing away from the grid (towards the smart meter). This is working as I think correctly, showing the correct positive kwh draw from the grid.

It does however seem to have an issue with the Solis Cloud software, which is reporting that I am exporting to the grid with no load to the house.

I have checked the manual which says to have the CT clamp pointing towards the grid, so I have changed it around. This does now show the correct incoming load from the grid to the house.

However, the Eastron meter is now showing a negative kwh load the house.

For all the hunting on the internet I cannot get my head around which way round it should all go!

Any advice would be greatly appreciated!

Re: CT clamp direction battery only storage, no PV.

Posted: Mon Apr 14, 2025 9:37 pm
by SporranMcDonald
My Eastron CT clamp (arrow) is pointing towards the GRID.

It is clamped on the LIVE ( brown ) . . . . . [ Consumer Unit ] -> [ CT clamp ] -> [ Dual-pole Isolater ] -> [ Smart Meter ] -> [ Main Supply Fuse ]

Re: CT clamp direction battery only storage, no PV.

Posted: Tue Apr 15, 2025 6:06 am
by Bash
Thanks

Does your Easton meter show the watts consumption as a - figure

Re: CT clamp direction battery only storage, no PV.

Posted: Tue Apr 15, 2025 1:58 pm
by SporranMcDonald
Bash wrote: Tue Apr 15, 2025 6:06 amDoes your Easton meter show the watts consumption as a - figure
Here, the "Active Power" (W) display shows a credible Wattage number.