gmikol said:
I have something like this. My EVSE is installed outside, but I just hooked up another conduit run to a 4x4 PVC box from the last J-Box before the conduit goes through the wall.
Mine isn't just instantaneous amps / volts. It's also a power meter, so I can easily log monthly usage, without spending the $$$ to get an energy monitoring system (a-la TED). I think mine was maybe $15, plus the extra box/cover/conduit/hub.
This is the one I got:
http://www.ebay.com/itm/171306062302" onclick="window.open(this.href);return false;
There seem to be 2 versions of this floating around...one version has a current transformer, and the other has a direct current shunt. While the one with hard-wired connections claims 100A, there's no way I was going to try and pull 30A through what looks like fairly thin wires, so make sure you get the current transformer version.
--G
This one remembers. It stashes the settings in its eeprom. Assuming the meter is wired from switched voltage it will keep track of charging time and KWH. Both are manually reset. If it is powered on continuously the timer is useless but the KWH still will work. The timer will indicate how long the EVSE has been powered.
So far I have used 3 of these. I really like the cumulative KWH. They are less than $12 shipped from China. The update is a little slow but they work fine. You really want the coil version since the coil-less version is current limited.
I just installed this KWH meter on my Schneider EVlink EVSE. Here are some pics:
