HPWC installation

HPWC installation

I have not yet taken delivery of my TMS (they're "sourcing parts") and trying to outfit her new home.

Just curious, the HPWC is a permanent installation and although I would only utilize its capabilities a small percentage of the time (same with the TMS itself) I am seriously considering the install enabling me to leave the mobile charger in the car full time. Can anyone who has made/had this installation provide a picture of it? Preferably of how the HPWC is mounted and wires are connected. Does it require a "box" mounted to the wall or does the HPWC mount directly to the wall and the conduit go straight into it (what size conduit).

Thanks in Advance.


mikefa | 15. juli 2013

You don't really need HPWC. The NEMA 14-50 alone will give you 30 miles range per 1 hour charge... which is plenty fast for home use.

Roamer@AZ USA | 15. juli 2013

To get full power out you need a direct run to a 100 amp breaker. You can derate the charger to lower amperage and use lower rated circuits.

The charger has one inch conduit knockouts on the sides and back.

Installing this charger is similar to installing a sub-panel.

Captain Ducman | 15. juli 2013

I understand the 30mph vs 62mph(ish) but if I have to add a breaker and run wire anyway, why not put a bigger breaker in and run bigger wire? The diference is the additional cost of charger+bigger breaker+bigger wire, labor is a constant for both. I appreciate any and all input/advice, I was just looking at options and was looking for some pictures of the HPWC installed

Roamer@AZ USA | 15. juli 2013

I have two Blink Chargers I use on my Nissan Leafs. One thing I really miss is the data collection the Blink chargers provide. I have not found any data tracking or reporting capabilities on the Tesla S car or chargers.

I power everything from solar panels and miss being able to track how much of my monthly demand was going to car charging and how much to house load. The Leafs were running about 300 kWh per month each. The Tesla has more range and gets driven more often and further than the Leafs so I assume I am using more power but do not have a way to monitor with the Tesla.

My dilemma is I can charge slower with the Blinks and have all the info or faster with the Tesla chargers and have no info. I went to the Tesla chargers because they are designed to work with the car and plug in and unplug easier than using the adapter on the Blink charger. Gave up charging info for ease of plugging and unplugging.

Captain Ducman | 15. juli 2013

Thanks 4rhansen, I hadn't found that page (prob looking too hard)

complete charging from solar, thats awesome!! If you don't mind me asking what size/amperage/how many panels/batteries? How fast can you charge from this set up? Sorry if I sound like a kid in a candy store, but I really am.

My only experience with LiPo's is flying giant scale RC airplanes, we track mah usage and voltage under a load for tracking battery life. This car is an UBER version of what I think I understand :)

Roamer@AZ USA | 15. juli 2013

I am a firm believer in what will do a lot will do a little. Always easier to run wiring capable of 100 amp loads then you can go either way. You can always use the 100 amp wiring with a 50 amp breaker and 50 amp plug if you choose to or you can go 100 amp. If you wire for 50 you can't go up. If you wire for 100 you can always go down.

If I were building new I would run a 200 amp subpanel to the garage area and then run a 100 amp circuit to the Tesla charger. Then when you get your can add another 100 amp charger.

If you use the 50 amp charge cord in your garage you can always buy another to leave in the car.

Roamer@AZ USA | 15. juli 2013

Captain, I had the same problem finding any info on the charger. After my car delivered all the links showed up on my "myTesla" page. Never did find them before. One reason I answered your post is because I had the same issue. Finally gave up and just waited until the charger delivered and I could look at it.

I run a grid tie solar system in Mesa Arizona. I oversized the system four years ago to have excess power to charge cars. With net metering it doesn't make sense to sell extra back at wholesale rates, 3.6 cents per kWh when you can put it in a car that gets about 3.6 miles per kWh. Works out to about 1 cent a mile for energy.

My system is three Sunny boy 7000 inverters, each with 39 panel strings or 117 total panels. Even running two battery cars, one Leaf and now the Tesla S, I am able to sell back about $100 dollars of power annually. My utility, Salt River Project, has an excellent net metering program. They reconcile once a year on April 30th. Hope the politicians in Arizona don't screw up a really simple net metering system.

Captain Ducman | 15. juli 2013

I also posted this question on TMC, here is a great series of pictures of the install of not only the HPWC but a secondary breaker box for the garage.

Alex K | 15. juli 2013

@ Captain Ducman | JULY 15, 2013 : Can anyone who has made/had this installation provide a picture of it? Preferably of how the HPWC is mounted and wires are connected.

These are not a detailed installation photos, but what a finished product looks like.

Ran sub panel to location near HPWC in garage. Dropped cable from sub panel behind wall to HPWC:

There is a sub panel to the left that was installed in this garage for the HPWC and a Nema 14-50. Wire is run behind drywall for both: