Nissan Leaf

[NeilBlanchard]

It is the 6.6kW. The 3.3kW is standard on the Leaf S, but we have the charging option. Depending on your consumption average, that's roughly 31-32 miles per hour.

[sendler]

The Mercedes B Class carries the 10 kW Tesla charger. Too bad the two charging stations they installed at my dealer have 30 amp breakers. There may be a few of us employees fighting over them on a daily basis. MB is offering a very attractive discounted employee lease price to help get some of these otherwise expensive EV's on the road to meet their quota.
But there are also a few 240v welder outlets scattered around here and there throughout the shop which may have bigger breakers.

[NeilBlanchard]

The JuiceBox is capable of up to 15kW charging, so that would be the way to go if you drive the Mercedes B Class Electric.

By the way, once we get our JuiceBox, we will have lower consumption, because 240V charging takes less time, and since the charger's losses are constant over time.

120V x 12A = ~1.4kW
240V x 28A = ~6.6kW

That is nearly 5X faster charging, so the losses are about 80% less.

[sendler]

Originally Posted by NeilBlanchard

the charger's losses are constant over time.

Interesting. I would have thought charging losses would be a certain percentage of the power output with only a small component that is constant as soon as you turn it on.

[Baltothewolf]

Originally Posted by NeilBlanchard

The JuiceBox is capable of up to 15kW charging, so that would be the way to go if you drive the Mercedes B Class Electric.

By the way, once we get our JuiceBox, we will have lower consumption, because 240V charging takes less time, and since the charger's losses are constant over time.

120V x 12A = ~1.4kW
240V x 28A = ~6.6kW

That is nearly 5X faster charging, so the losses are about 80% less.

How long does it take to charge right now?

[NeilBlanchard]

It is slow with the stock EVSE - the manual says ~21 hours to go from 0-100%, and since we have only ever gotten it down to ~12 miles, I can only estimate that this is probably accurate. We are typically charging for 10-12 hours and usually getting it up to 100%.

Speaking of EVSE's, my brother received his JuiceBox Premium yesterday:



It is a bit taller than I thought it would be - it is sitting on his lap, and he is a 6'-6" ~265 pound guy. He says it looks very well made - it is all metal. I thought it was plastic, so that is a relief. The black cord is a 50A six foot RV plug, and the orange is a 32A twenty five foot J1772 output. (The 50A J1772 would have cost another $75 or so, and weighed an additional 3 pounds.)

I have no idea what the brown thing is that is taped onto the unit, but it covering the digital display window.

[redpoint5]

Originally Posted by NeilBlanchard

I have no idea what the brown thing is that is taped onto the unit, but it covering the digital display window.

The brown thing is an RF transmitter.

Is the charger remotely controlled?

[NeilBlanchard]

Now that you mention it, it does come with a remote.

I know from computer power supplies that are also "dual" voltage, that 240V is more efficient by a couple of percent or so.

[user removed]

Originally Posted by sendler

Interesting. I would have thought charging losses would be a certain percentage of the power output with only a small component that is constant as soon as you turn it on.

In the consumers report testing they measured 15% losses from the buildings electrical meter to the battery.

regards
mech

[NeilBlanchard]

Right, that is pretty typical for today's EV's - 85% plug-to-wheels efficiency. Some EV's like the IMW 'Seven' have this up to ~92%.