For Oahu electric vehicle owners: have you bought a “free” EVSE?
We’ve been charging our Nissan Leafs just fine so far with the OEM 110v L1 cord. Now we’ve ordered a JuiceBox Pro 40 240v L2 EVSE as part of a HECO research project.
The program has been around for a couple months-- if you’re already participating then I’d love to read what you’ve learned so far:
I’ve read a few of this forum’s JuiceBox threads and I understand the basics. Does anyone else here have EVSE experience to share about a newer JuiceBox Pro 40? HECO wants us to have it on our WiFi router for their data collection, and our signal in the garage is weak but usable. If our signal is too weak then I’d rather plug in an Ethernet cable than boost the router.
We'd mount the EVSE on the inside garage wall near our circuit-breaker panel. Our 30-year-old 240v circuit breaker for our electric dryer receptacle is only 30 amps, which might slow down the L2 charge. If we want to put a dedicated 240v EVSE breaker in our garage box then we’re probably going to have to move around another circuit breaker to make room, although I’m not sure how large we could go by our local electrical code. The 240v circuit breaker for our kitchen range is already 50 amps, so ideally we’d be able to add a second 50-amp breaker for the EVSE... or whatever capacity is appropriate.
Please let me know if you can recommend an Oahu electrician. (I understand home electrical systems but I’m inexperienced with the NEC.) We’ll hire an electrician to mess around in our circuit-breaker panel and hopefully do it right the first time.
Whether we use the dryer receptacle or a dedicated circuit, our home’s electrical load is very low. We have a solar water heater and no heating or air conditioning (only ceiling fans). Our biggest starting surge is probably our refrigerator or a vacuum cleaner.
We also have a 4KW photovoltaic array and one of Oahu’s original net-metering agreements from 2005, so our power is essentially free at all hours. HECO won’t use time-of-day metering on us and our only utility expense is the $18/month connection fee. I’ve run the array’s numbers through PVWatts and it looks like we’ll have more than enough annual production to supply our Leafs (one at a time) and our house.