Re: Expanding EV charging in Yosemite
Posted: Thu Sep 29, 2016 5:09 pm
Particularly at places like Tuolumne Meadows, I think the convenience and abuse-prevention benefits of J-1772 connectors outweigh the risk of vandalism. And it is not obvious to me that inductive charging is the answer here, as I would imagine the losses could be fairly high if this approach is used for slow L1 charging. (It's already slow enough without adding more resistance.)GRA wrote:The question is, is it better to risk losing someone's personal EVSE [for L1 charging] without disabling the charging station, or provide permanent EVSEs with J1772 connectors that will be used more often, but which can be put out of service with a single act of vandalism? The long-term answer is obviously wireless charging via embedded coils.
I think you are right on this point. Some might be surprised to find that in campgrounds using the honor system, a non-trivial fraction of campers try to slide by without paying. I've witnessed this. As a result, rangers are forced to waste their time checking for compliance.GRA wrote:AOTBE I'd opt to use simple, reliable Clipper Creek EVSEs everywhere, and use the honor system. But, while that will work well among early adopters, if PEVs move from the early adopters to the mainstream the % of people who will 'do the right thing' voluntarily is going to drop precipitously. I'm still pondering what to recommend.
Given that there's no wifi and the cellular data coverage is spotty, I suppose a PoS system might have to work over traditional phone lines if possible. Another option could be to activate EVSEs using a machine that reads coins and bills, like a vending machine, but that seems expensive and clunky.
Maybe the best that could be done would be to require payment by envelope and have park staff check any parked vehicles vs. the envelopes from time to time, with the threat of real parking tickets for those who choose not to pay. While I'd prefer not to add another responsibility for park employees (or volunteers), this is actually in concept no different from maintaining other park amenities that visitors depend on.