Being a cheapskate and professional recycler, I splurged on $15.50 glass dome utility meter from http://www.hialeahmeter.com/siphwame.html
Looks real nice hanging on the wall, there's no debating what the EV charging usage has been, and I can tell the kids all about how things used to be. I mounted mine with a round socket on an old plastic cutting board so that it's also portable, with a 14-50 plug and both the 14-50 outlet and a L14-30 outlet. Works fine vertical or horizontal, with an old-school faint creaking sound from the mechanism to confirm that the juice is flowing... It's also bidirectional, for playing with solar or measuring energy production from a genset.
2012 i-SE "MR BEAN" 110,300 miles
2016 KIA SOUL EV, 90 kW, 27 kWh, 34k miles
2000 Mazda Miata EV, 78 kW, 17 kWh
1983 Grumman Kurbwatt EV,170 kW, 32 kWh
1983 Mazda RX-7 EV 43 kW 10 kWh
1971 "Karmann Eclectric" EV 240 kW 19 kWh