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Basic question about charging

5.4K views 51 replies 18 participants last post by  Ovation  
@Jonomite , the other thing you need to consider is the plugging/unplugging from a 240V outlet. It's one story if you intend to leave the charger plugged in, but a whole another story if your intention is to plug/unplug every charging session (from the wall outlet). Those are not geared for such use and might cause electrical issues. When it come to using an EVSE, a hardwired version is better over a plugged one (if you are putting in a charger, you typically will be leaving it plugged in, so there's not much of a point in having a pluggable EVSE over a hardwired one). The other thing to note is that typically 240V outlets are capable of supporting a max of 50A, which means that you can charge you car at best at 40A (recommended continuous load = 80% of rated breaker capacity). If you get a hardwired one, you can go for greater amperages and hence charge your car faster. A 60A charger can output about 10kWh (give or take). What you need to factor in are your typical daily/weekly mileage, the opportunity/time you have to charge your car and then decide with the setup. Personally, I have a hardwired 60A EVSE, even though I do not travel more than 100 miles per week. The state I live in provides a $1000 (max) credit for EVSE install and I wanted to maximize that and future-proof the EVSE.
 
@Jonomite , there are answers to your question above already, but want to reiterate that the decision is personal. If YOU believe that it's worth getting a hardwired EVESE, go for it. If not, use the provided charger. Laying out my personal choice here. I will be living in my house at least for the next 10 years, and it was worth my time/effort/money to have the 60A EVSE installed. This enables me to charge at 10/11kWh which is very close to the max the P*2 can accommodate (11.9kW). When our ICE car dies, we will be getting another EV, so having the ability to quickly charge a car using the max we can afford (and our electric panel can support) makes it worthwhile for us. As mentioned, your daily/weekly mileage, your driving habits (on-the-spur decision to go on a longer drive etc.,), cost of electricity, any subsidies/grants provided by your local government, the time you have available to charge your car, the number of electric cars in your family, the likelihood of friends/guests coming over for a weekend and wanting to charge their EVs, the cost tiers of electricity (lower in off-peak) etc., are SOME of the factors to be considered and make a decision