Zappi by My Energi is a great untethered unit that we highly recommend have a look athttps://myenergi.com/product/zappi/ it can go directly from your electricty mains or if you generate your own electiricy by Solar PV you can charge your car using green energy for free! It is the world's first Solar compatible EV charger. Have a look at our website page 'Electric Vehicles' https://www.nicholaselectrical.co.uk/electric-vehicle-charging-points for the latest information and our portfolio of works page for photos f our installshttps://www.nicholaselectrical.co.uk/page-1 or find us on Instagram @nicholaselectrical