New poster here, I have a Mercedes a250e on order for next March and so I’m now looking into a charger. Firstly I should explain that I have separate garage fed by an underground cable. In readiness for the charger I have had the cable replaced from the main CU to the rear of the property (junction box) and then onto the garage with 10mm cable. I have also had a new CU and isolator switch fitted in the garage. Now I am in touch with various charger suppliers/installers. My question is regarding the CT clamps that I am reading about, it is not practical to run a cable from the meter box or the main CU to the charger. Are CT clamps a necessity or just an option? If they are required then my only option is WiFi using a Harvi, this is offered with the Zappi but is it offered by other EV charger manufacturers? One final question, does the Harvi CT clamp talk directly to the charger or does it require a hub? I currently use Hive for my CH and controlling lights so their offering is of interest but the same questions apply. Sorry for the long post, look forward to hearing your replies.
Iansums
Hi,
As I understand it CT clamps are used to monitor the power being used in the property and the charger is limited if the current drawn gets close to the incoming fuse rating 60, 80 or 100A. They are slso used to monitor solar so that the car is charged only using that.
As I understand it CT clamps are used to monitor the power being used in the property and the charger is limited if the current drawn gets close to the incoming fuse rating 60, 80 or 100A. They are slso used to monitor solar so that the car is charged only using that.
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