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Had my charger fitted yesterday. Installer checked and I have an 80A main fuse which I thought was good - he’s set the charger to grid limit at 80 just in case but we don’t have electric showers or heating so I doubt we’ll ever get near that.

Should I still inform the DNO? I’m fine if they do a free upgrade to 100A but I don’t want to pay for one if I don’t need it. (meter etc all ready for 100A so should just be a fuse swap)
The installer had to inform the DNO that an EVSE has been installed regardless of the Fuse Rating.
 

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My understanding is that the charge point installer has to do the calculation on what fuse is needed then you have to apply for that change by the DNO. If no change is needed, you just have to notify them about the installation of the charge point.
No, the installer does not dictate to the DNO re the fuse size, it doesn't work like that.
 
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