80A L2 charging

[cwoodcox]

There is the option to put that regenerative charge into a resistor bank instead of the battery. It isn't all or nothing. I----resistor bank? Point me to this item?

This is how diesel locomotives brake, they don’t have any batteries, they just shunt the current from braking with the traction motors into a giant heat sink.

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[cwoodcox]

I don't really understand the "dual charger" aspect of it however. Is the wall mounted charger the only thing needed to achieve 80amp Level 2 charging, if that's the case, then it would work for a Rivian plugged into the same system no? or is it something that the truck has to have the ability to accept?

Yeah. You’re getting AC power from your Level 2 ”charger” (it’s just a fancy light switch with high-current wiring) and something has to convert that to DC and ramp it up to battery voltage. This is accomplished by the on-board charger. Usually, it can take up to 240V, 48A input and convert it to DC, and stuff it into the battery.

Tesla used to offer dual chargers as an option. Wired in parallel, they took up to 240V, 48A input each, allowing for 80A charging. They stopped this a few years ago.

You can plug your Rivian (or any EV) into the EVSE wired for 80A charging, the EVSE will notify it that it can draw up to 80A, but the vehicle will only ever draw the current its chargers can handle. The on-board charger is in complete control of the current level.

 

[R1S Maineiac]

Thanks to COVID, my wife and I now both telework. Our 15 miles/day "commute" is dropping off and picking up the kiddo from daycare across town.

even on my meager 30A circuit, that's like 2 hours of charging.

I'm still waiting for the Max Pack though, because I want it for the long ME to VA Christmas round trip, and I'm assuming it will have the better charging curve out of the 2 packs.

Plus...adventures in Maine. I can actually go a little further from the beaten path with the added range

 

[R1S Maineiac]

But one thing I found interesting is most people I know working in the construction industry that are looking at the Lightning, are blown away by the 200 mile range in a good way. Now what I suspect, is they are not versed in the many things that can hamper a vehicles range (Gas or Electric) due to towing, weather etc. and are blindly assuming that is an "across the board" usage scenario range available to them. Then in the end, only the hardcore "range braggers" really seem to care about anything beyond 2-300 miles, the general public seems more than happy with anything in that range.

I suspect that most of them don't put a lot of thought into how far their current work trucks CAN go. They work on jobs that are probably no more than 50 miles roundtrip.

So for a strictly work truck use case, 200 might be fine.

But I know a lot of guys who then take their company truck and pull the camper or 4 wheelers or snowmobiles behind it on weekends. THOSE guys are in for some disappointment.

 

[trickflow]

2 miles down the road is a Super Charger, I'll just hit that and grab a cup of coffee before heading out.

Make sure it is a CCS. Telsa Superchargers will not work with a Rivian.

There have been comments about the TOU rate plans (required in CA now if you get solar) but the high rates are either 4-9 PM or 5-8 PM so working around that should not be an issue.

With TOU, there are 3 rates. Peak, Off-Peak and Super Off-Peak. The cheapest rate is from 10PM to 8AM with SCE where I am. This is when I charge.

 

[SeaGeo]

While I am in the camp that 40 and 48A charging is fine for home use, I was just thinking about the waypoints after planning out a little road trip away from DCFC. Having the the vehicles and waypoints be able to have the *potential* to maximize the J1772 and 80A would be nice. If the were limited to less than 80A at a location, then that's fine. But where it's possible, that would have been nice to pick up another "10 miles per hour" of charging.

That falls in the "nice to have" category of things though.

 

[SANZC02]

Make sure it is a CCS. Telsa Superchargers will not work with a Rivian.

With TOU, there are 3 rates. Peak, Off-Peak and Super Off-Peak. The cheapest rate is from 10PM to 8AM with SCE where I am. This is when I charge.

This is my current method with the Tesla, I'm in SoCal so plenty of CCS chargers nearby as well.

For TOU with SCE, they have 3 defined super off peak is in the mornings (only in the winter), I did not mention it as I figured most people tend to charge overnight and not in the 8AM - 4 or 5PM range, if they charge there in the winter they can save a couple of pennies a KW charging during the day.

 

[trickflow]

This is my current method with the Tesla, I'm in SoCal so plenty of CCS chargers nearby as well.

For TOU with SCE, they have 3 defined super off peak is in the mornings (only in the winter), I did not mention it as I figured most people tend to charge overnight and not in the 8AM - 4 or 5PM range, if they charge there in the winter they can save a couple of pennies a KW charging during the day.

My rate plan has both a summer and winter, and super off peak is still about 1/2 the rate of off-peak (which if I take a weekend drive and it charges 15 hours (Let's say I have the large pack and leave some reserve) I could charge until 1PM putting me into the 30/34 cent rate:

Weekday Summer Rates
Off-Peak: 34 cents from 8 a.m. to 2 p.m., and 8 p.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.
On-Peak: 61 cents from 2 p.m. to 8 p.m.

Weekend Summer Rates
Off-Peak: 34 cents from 8 a.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.

Winter Rates
Winter rates apply from October through May. Rates are per kWh.

Weekday Winter Rates
Off-Peak: 30 cents from 8 a.m. to 2 p.m., and 8 p.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.
On-Peak: 40 cents from 2 p.m. to 8 p.m.

Weekend Winter Rates
Weekend Off-Peak: 30 cents per kWh from 8 a.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.

 

[SANZC02]

My rate plan has both a summer and winter, and super off peak is still about 1/2 the rate of off-peak (which if I take a weekend drive and it charges 15 hours (Let's say I have the large pack and leave some reserve) I could charge until 1PM putting me into the 30/34 cent rate:

Weekday Summer Rates
Off-Peak: 34 cents from 8 a.m. to 2 p.m., and 8 p.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.
On-Peak: 61 cents from 2 p.m. to 8 p.m.

Weekend Summer Rates
Off-Peak: 34 cents from 8 a.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.

Winter Rates
Winter rates apply from October through May. Rates are per kWh.

Weekday Winter Rates
Off-Peak: 30 cents from 8 a.m. to 2 p.m., and 8 p.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.
On-Peak: 40 cents from 2 p.m. to 8 p.m.

Weekend Winter Rates
Weekend Off-Peak: 30 cents per kWh from 8 a.m. to 10 p.m.
Super Off-Peak: 16 cents from 10 p.m. to 8 a.m.

Wow, I thought my rates were high with SCE.

An example of SCE for the TOU 4-9, They also have a 5-8 and a prime 4-9 but these are probably the best rates.

Prime(4-9) if you have an electric car or solar

 

[trickflow]

Wow, I thought my rates were high with SCE.

An example of SCE for the TOU 4-9, They also have a 5-8 and a prime 4-9 but these are probably the best rates.

Prime(4-9) if you have an electric car or solar

I am in a Grandfathered rate plan, TOU-D-A. With my Solar, I always have a negative electric bill on how I currently use electricity. Will need to check and see if I should change it!

 

[DucRider]

My rate plan has both a summer and winter, and super off peak is still about 1/2 the rate of off-peak (which if I take a weekend drive and it charges 15 hours (Let's say I have the large pack and leave some reserve) I could charge until 1PM putting me into the 30/34 cent rate:

How many time a year will you use nearly the entire battery, then charge overnight and need nearly the entire battery the next day?

Scheduled charging lets you set preferred charge times and you get back to your normal full charge over a couple of nights. Smart EVSEs can communicate with utility companies and "know" the rates and handle this automatically. You can override if need be and charge at the higher rates.

Even smarter charging allows you to set a target SOC% at a target date/time. Since the J1772 standard doesn't have provision for the vehicle to communicate SOC%, it requires an app/software on both ends to enable this

 

[trickflow]

How many time a year will you use nearly the entire battery, then charge overnight and need nearly the entire battery the next day?

Scheduled charging lets you set preferred charge times and you get back to your normal full charge over a couple of nights. Smart EVSEs can communicate with utility companies and "know" the rates and handle this automatically. You can override if need be and charge at the higher rates.

Even smarter charging allows you to set a target SOC% at a target date/time. Since the J1772 standard doesn't have provision for the vehicle to communicate SOC%, it requires an app/software on both ends to enable this

A couple of times a month where I would use more than 300 miles. And I am lucky that my electric bill works electronically with SCE (my power company), so there is no comms to the EV.

 

[DucRider]

A couple of times a month where I would use more than 300 miles. And I am lucky that my electric bill works electronically with SCE (my power company), so there is no comms to the EV.

This is 300 miles each day for two successive days?

 

[trickflow]

This is 300 miles each day for two successive days?

Correct.

 

[Interferon]

Personally, I don't like charging to 100% (full) since it significantly reduces regen braking (at least in my Model 3)

It's also very hard on the battery.

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