Stopping Car Charger from using House Battery (Again)
Posted: Wed Apr 16, 2025 7:06 pm
Sorry the image is rotated by 90 degrees, but this is my board.
I have the problem that the car can charge off the battery and, obviously I don't want that.
You can see the CT clamp from the solar just above the main fuse (Or in the rotated image, it's the small white cube to the left of where either says "Solar PV on roof".) It is clamped around the live wire which then goes into the mains meter.
Everything works find except that the EV charger can, at times, pull from the battery.
The EV CT Clamp is just below the meter (Or in 90 rotated image, just to the right of the meter) and is a small black cube and connected to the live and goes into a Henley Block where it is joined by the Live from the Inverter.
The Neutral from th meter also goes into a Henley Block where it is joined by the Neutral from the Inverter.
On the other side of the Henley block are two outputs:
1. Goes to the EV Charger
2. Goes to the House distribution Boards (I have two, so that output is split by more Henley Blocks.
Everything I've read says the EV Charger clamp is in the correct place, and that I need to move the Inverter CT clamp to the live output into the distribution boards below the Henley Block, so it no longer measures the power being used by the EV Charger. However, when I do this I get very strange readings in the FoxESS app.
Any ideas?
thanks
I have the problem that the car can charge off the battery and, obviously I don't want that.
You can see the CT clamp from the solar just above the main fuse (Or in the rotated image, it's the small white cube to the left of where either says "Solar PV on roof".) It is clamped around the live wire which then goes into the mains meter.
Everything works find except that the EV charger can, at times, pull from the battery.
The EV CT Clamp is just below the meter (Or in 90 rotated image, just to the right of the meter) and is a small black cube and connected to the live and goes into a Henley Block where it is joined by the Live from the Inverter.
The Neutral from th meter also goes into a Henley Block where it is joined by the Neutral from the Inverter.
On the other side of the Henley block are two outputs:
1. Goes to the EV Charger
2. Goes to the House distribution Boards (I have two, so that output is split by more Henley Blocks.
Everything I've read says the EV Charger clamp is in the correct place, and that I need to move the Inverter CT clamp to the live output into the distribution boards below the Henley Block, so it no longer measures the power being used by the EV Charger. However, when I do this I get very strange readings in the FoxESS app.
Any ideas?
thanks