[theo1000]

My local utility upgraded my panel to 250 amps last year. And a 60 amp feed for my workshop for ~ $600 for each feed. It is rate limited as they are regulated utility, so no one pays the full cost to feed their home. I hired a local electrician to run the Al cables (way cheaper) for each feed @ ~$1,500 this included the copper bus elec panel and refeed and 3 visits. Cable was buried 4' deep per utility.

Utility guy said there was plenty of capacity to go to even a 500 amp panel if I wanted. And if everyone wanted. as well. Not sure what that means so YMMV. I'm thinking 100 amp for a DCFC may not be such a huge deal in my one case.
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In the long term there will be a market for going DCFC @ home. Every so often now (once twice a month) I have to run to the local DCFC to recharge esp. on days like weekends when all my kids and relatives are cycling through.

Just this Sunday I have a run to airport + plus drop off and pick up @ swim meet + Run to my second job twice scheduled. Easily over 400-500 miles. If I can juice up a 100-150 miles/hr it should be doable but right now my Volt/BMW REX is going to be burning gas. And I'm not and won't be an outlier where I live.

Why plug in over night when you can full charge in 15 minutes?

I also think in the really long term future as gas declines there will be fewer and fewer gas stations and pressure will be on to charge everything at home. The US residential infrastructure turns over at 1%-2% annually. It won't take a long time for something like that to become standard in at least upscale type homes.

 

[theo1000]

"Charge" the batteries slowly through solar or grid and then transfer than energy from the battery to an EV using a DCFC. That way you don't have to pull huge amounts of power from the grid.

--Yup! that is the thought behind things like the TESLA power wall. But any such battery will likely have to be bigger than your EV battery so the numbers many not pencil out.

Soon enough, we will start seeing 120 kw to 150 kw battery packs, esp. for SUV/Truck type vehicles. At which point the L2 can easily become the limiter @ residential level.

 

[theo1000]

Pretty sure that if the infrastructure turns over at 1% a year, Capt. Kirk will have been born by the time my power gets uprated.

heh! 50 years will go by like that, (snaps finger) ....

Don't ask how I know.

 

[theo1000]

An installation doesn't make sense unless it gets a lot of use. Can you add it to your house, sure. Should you? Not unless you have lots of money you don't need, in which case I'll accept a donation.

I suspect these units have a lot more robust build for an external install as well as all manner of bells and whistles not required for a home install. I bet it can be made a lot cheaper for interior residential type install. They will go through the cost reduction cycle that L2 chargers have/are going through.

Its not just a question of high use. Think about it. A 150kw battery for a heavy duty truck/SUV would take ~24 hours to full charge on present 7.2kw L2 chargers. Even a 25KW DCFC would take ~ 6 hours to full charge.

 

[theo1000]

All good points. We will have to see how it shakes out. Just don't dismiss Residential DCFC out of hand is all I'm saying....

WRT the 150kw battery [not kwh btw ] I'm thinking more in terms of towing and the work loads I put my Tundra through on a weekly basis. You know the need and more important the upsell desire is going to be there.