ELEGRP Level 1/2 EV Charger, 16 Amp, Portable J1772 Charger, 25FT Cable, NEMA 6-20 & 5-15 Adapter, Electric Car Charger 110V-240V for BEVs PHEVs, PBE & LRC Technology

The above is good advice. If you're charging overnight in a private garage. 120v 15 amp service is fine. I just use an existing outlet. FWIW, I got this. Works fine and can connect to either 120 or 240v circuits for L1 or L2 charging. For overnight charging 120 is all you need. https://www.amazon.com/dp/B0DY7TT3VD?ref_=ppx_hzsearch_conn_dt_b_fed_asin_title_7