BYD announces 1000V battery, 5 min to charge

[hturnerfamily]

and, on a second concern, about 'the grid':

while sometimes we wonder if the 'grid' will be able to support our EV charging, my view is that if much of our 'extra' EV charging amperage happens at night, we are then charging AFTER the bulk of the grid's daily requirements are already 'sleeping' for the overnight...

so, if the grid is handling, for instance, 10MW(mega watts) of transmission during the hottest and highest demand of the day(generally 2pm to 7pm,etc), that demand is already built and supported by the grid's infrastructure.
When the nighttime arrives, the demand may fall to 5.

I would doubt that even every EV charging during that time would stress the 'grid'.

The same applies to your local transformers.
If you use, at the daily peak at 5pm, your 240v oven/stove, air conditioning, water heating, etc, and pulling 100amps, max.. then during the overnight hours, when much less is in play, such as only air conditioning, or heating, periodically, you have plenty of capacity for the EV to pull 30-50amps of typical EV charging, without any local or grid capacity issues.
This is even less of a concern for those with gas heating and/or appliances.

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[Firn]

per Rheem:
Model NumberRTEX-36
Kilowatts36kW
Recommended Breaker Size(4x40)A
Voltage240/208V
Recommended Wire Size (CU)8 AWG
Min. Flow (GPM)0.3
Max. Flow (GPM)8
Amps150A

while any whole house Water Heater system like this may require up to 4 double-pole 240v breakers in your panel, and up to 150a of total capacity, AT FULL WATER HEATER OUTPUT, it's also not going to be 'usual' for the max output, or the max 150a capacity, to be used at most any given moment. Yes, two showers and clothes washing and dish washing 'might' all happen at the same time... but... all elements don't draw at the same time, all the time - but only when needed, in rare occasions. " a sensor measures flow rate while another sensor measures the incoming water temperature. This information is transmitted continually to the computer logic controls which decide how much power to send to the heating elements to heat the water to your desired temperature. "

'lectricians will most always build to the 'worst' case scenario and may demand a 400amp panel, along with all your other regular electrical needs...

but, the reality that all of that happening, at max capacity, and at the same time your two air conditioners are going, and the oven is baking, and the stove is cooking... all at the same time... no, not reality.
Or, it's the middle of the night, and your EVs are pulling amps... you're probably sleeping, not showering and cooking.

Unlike a traditional water heater which operates both AS your are using heated water, and as needed to maintain temperature throughout the day, the USAGE-BASED tankless water heaters ONLY operate during that VERY SHORT timeframe that the heated water is needed, and NEVER again throughout the day or night. A long shower might be 10-15 minutes. A clothes washer might require heated water for 5 total minutes of it's cycle. A dishwasher about the same. etc.
This amounts to about 30minutes to 1hour in a WHOLE 24 hr period, and probably not while your EV is charging, and probably rarely, if ever, using the full 36kw capacity.

I like the idea, and would not hesitate to replace a tanked water heater with this type of system in our 'standard' all-electric 200amp home, with our two full EVs, two 30amp heat pumps, and a separate mini-split... although we never use 'all' of those at the same time.

36kw was the largest residential unit i could readily find, most of them were much smaller, even down to 11kw.

Since this is now a water heater discussion, lol.

I would strongly recommend a heat pump water heater over an on demand one. The on demand heaters are no more efficient than a tanked system at making hot water, they just don't bleed heat from the tank so overall efficiency is slightly better. A heat pump water heater on the other hand uses SIGNIFICANTLY less energy, being up to almost 400% more efficient. Installing one in our house dropped our energy bill by around $100, offsetting about half of the cost of charging the lightning (~2,000 miles per month). Even with 6 people in the house we have never kicked on the regular heating element.

 

[MotoGary]

Since this is now a water heater discussion, lol.

 

[chl]

I read it as the technology is being announced and starting production. Either way, the business world is excited about it.

Wall Street Journal: BYD Shares Touch All-Time High After Unveiling New Charging Tech

China is going to dominate the EV market everywhere but in the US it appears.

 

[chl]

From the WSJ article:

"...The charging system will be available on the company’s new Han L sedan and Tang L sport-utility vehicle models, which will go on sale next month, BYD said..."

So not just an idea or a concept or a goal...but something tangible it seems?

 

[SpaceEVDriver]

I'm impressed with the BYD charging system, but am not especially jealous of a 5-minute charge. That's not even enough time to get to the restroom, much less finish my business, buy some snacks, and get back to the car. That said, China is pulling further and further ahead while we seem to be going back to coal-gas-fueled, hand-cranked horseless carriages. Good job us?

I installed a Stiebel Eltron Tempra Plus 20kW tankless water heater as a replacement for a tanked energy-wasting resistive heater. The 20 kW install required two 40A, 240V breakers and circuits. The Tempra 36 kW install requires three 50A, 240v breakers and circuits. I regret not getting a heat pump heater instead.

 

[Zprime29]

Post 19 is the first place I see 86kW thrown out. @Firn looks like you are assuming six 60A breakers with each breaker at 240V. Are there 240v breakers? I'm definitely not an electrician, but as I understand it, each breaker is 120V and we tie 2 out of phase breakers to get 240V. So the six breakers mentioned is actually three pairs of breakers to achieve 3 * 60A * 240V = 43,200W

On the topic of the grid, I'm looking forward to bi-directional EVSE allowing for micro-grids. There are more solutions to stabilization than just, "add more power plants".

How long have we been promised solid state EV batteries now? I almost think fusion reactors will come on line first.

 

[Firn]

Post 19 is the first place I see 86kW thrown out. @Firn looks like you are assuming six 60A breakers with each breaker at 240V. Are there 240v breakers? I'm definitely not an electrician, but as I understand it, each breaker is 120V and we tie 2 out of phase breakers to get 240V. So the six breakers mentioned is actually three pairs of breakers to achieve 3 * 60A * 240V = 43,200W

On the topic of the grid, I'm looking forward to bi-directional EVSE allowing for micro-grids. There are more solutions to stabilization than just, "add more power plants".

How long have we been promised solid state EV batteries now? I almost think fusion reactors will come on line first.

120v or 240v depends on if you go from one phase to neutral, or from one phase to another phase. Breakers themselves can be 120v or 240v. Heating elements, or objects that use a lot of power, are typically on 240v since it lowers the current to achieve any given wattage (w=I x V), current is what makes heat in the wires. Double the voltage, half the current.

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