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[Crissa]

The battery charge slows down a lot near the end of the SOC. On...

Irrelevant to the question of Power Tank vs Charge Tank.

-Crissa

[DonTom]

Irrelevant to the question of Power Tank vs Charge Tank.

-Crissa

But was relevant to your previous post.


-Don-

[Crissa]

No, it wasn't, Don.  The slowdown happens at the same battery percentage.

-Crissa

[DonTom]

No, it wasn't, Don.  The slowdown happens at the same battery percentage.

-Crissa

Yes, it happens at around 80% SOC on each, regardless of battery size.


That is  exactly why the larger battery will give more range at less charge time.


At 50% SOC on the double sized battery,  the half sized  battery will at 100% SOC. There is no slowdown at 50% SOC and only the smaller battery will have to get to the slowdown for the same range.


-Don-  Reno, NV

[Crissa]

That's still more time, Don.

-Crissa

[DonTom]

That's still more time, Don.

-Crissa

Yes, the smaller battery will take more time to charge for the same range when the smaller battery is charged to 100% and the double sized battery is charged to 50%. Same range, less charge time, on the larger battery, just as I was saying.


-Don-  Reno, NV

[Crissa]

Same range, less charge time, on the larger battery, just as I was saying.

No.  It's the same charge time per miles, Don.

Only in the very edge case that you get to the ramp-down with the smaller battery and you don't with the big battery would there be a speed difference.

But it's an edge case that in practice you rarely encounter.

-Crissa

[DonTom]

No.  It's the same charge time per miles, Don.

Only in the very edge case that you get to the ramp-down with the smaller battery and you don't with the big battery would there be a speed difference.

But it's an edge case that in practice you rarely encounter.

-Crissa

What is the difference between a "charging speed difference" and "miles per minute" of charge? And small batteries  MUST charge to full to get the same range as a double sized battery at 50% SOC, therefor the larger battery charges faster, in most cases. A large battery doesn't nearly as often have a need to charge to full as a smaller battery.


In fact, I charge to 100% SOC every time on my DS on a trip. Almost never on my SR.




-Don-  Reno, NV

[Crissa]

...small batteries  MUST charge to full to get the same range as a double sized battery at 50% SOC, therefor the larger battery charges faster,

Oh, I see your confusion.

A Power Tank is not a double-sized battery.

Secondly, you don't need to charge to 100% of the smaller battery except in specific edge cases.  Not 'most cases'.

A smaller battery has to charge more often, but it does not have to charge slower.

-Crissa

[DonTom]

.Oh, I see your confusion.

A Power Tank is not a double-sized battery.

I never claimed such. But the charge tank still  helps avoid the charge slowdown for going the same distance as not having it.


IOW, I can charge longer at  8KW with no slowdown, because of the power tank, when I  don't need the last 20% for extra range.  IOW, the advantage of the power tank is more than range, also allows faster charging when a full charge is unnecessary.


It's  faster to charge more often than less often because of this. On any EV, best to avoid the top 15 to 20% SOC to get more MPH of charge, as well for being better for the service life of the battery. That includes my Tesla as well as all three of my electric motorcycles.


IOW, charge to full when necessary to get to the next charge station. And once in a while for cell balancing, even if the extra range is not needed.


On today's ride, I will only charge to full in Schurz as I do not know if I will be able to slow charge in Yerington (no CCS there at all). I may have to make it all the way to Silver Springs (55 miles). I will stop all my other charges at around 85% SOC. The faster the charge, the more charge slowdown near the end above ~85% SOC.


-Don-  Reno, NV

[ADVENTURESonZERO]

I'm awestruck at the amount of urine still going here...the contest continues 

[DonTom]

I'm awestruck at the amount of urine still going here...the contest continues 

Well, I am done here on this subject anyway. I said all I wanted to say--and then some--on this issue.


-Don-  Reno, NV

[Kill3rT0fu]

I'm awestruck at the amount of urine still going here...the contest continues 

I'm drenched bby

[Kill3rT0fu]

For the sake of example, if I have the charge tank, how would I wire 2 extra 3kw chargers? Would I be able to charge through one socket? Or Would I need 2 charge ports?

[DonTom]

For the sake of example, if I have the charge tank, how would I wire 2 extra 3kw chargers? Would I be able to charge through one socket? Or Would I need 2 charge ports?

Need more info. 240 VAC outlets are  normally good for close to 12KW. 120 VAC outlets are normally only good for less than 2 KW.


J-1772 is usually good for around 7KW,  but varies.



-Don-  Reno, NV