Originally Posted by Trevor
I wrote up my understanding of Zoe charging on a blog page here:
I looked at your blog page. Well done, but a few of the numbers are slightly off. Your math is correct but the assumptions are wrong.
Fuses and circuit breakers exist to protect the wiring. The 13Amp fuse in a BS1363 plug is there to protect the cable if the device shorts out. It is there to prevent fires and melted insulation.
The ESVE BS1363 cable draws 10 Amps. It is in the spec sheet for the Kangoo Z.E. and Fluence. Renault doesn't give a power rating but it is probably close to 2kW. (Edit: Your blog is correct, but the spread sheet above says 13A)
The 220V 16Amp single phase Type 2 connection charges at either 3kW or 3.5kW. The Kangoo spec sheet says 3kW but I've seen 3.5kW elsewhere. Kangoo spec sheet says 0% to 100% takes 8 hours.
The Zoe has a 22kWH battery pack. Presumably it uses the same cells as the pack in the Z.E. cars but configured differently. At these lower power levels, Zoe charge times will be the same as the Fluence and Kangoo Z.E. 8 hours for 0% to 100%. A real 5-7 hour charge time is likely since none of us want to coast home on a dead pack.
The charger should have power factor correction. I'd be very surprised if it isn't. But yes there are losses. A good switch mode power supply works at about 90% efficiency.
I take everything on the Renault UK website with a grain of salt. There are some obvious errors on the Zoe specs. The van retail price book I got from Renault Liverpool last weekend does not agree on some details with the one I downloaded from the web. Renault is not alone here. I've found errors from other manufacturers. Until people get their cars we won't know for certain what the on-board charger can really do. Even then, there could be updates and software patches.
I've been told informally that the Kangoo Z.E. will get the 2nd Generation charger from the Zoe sometime in 2013. I was also told that the charger would have a 7kW charge from a 32-Amp 220V 1-phase connection.
Having said that, I've seen conflicting information about support for 7kW 32Amps single phase. It could be the charger design has changed.
I found this digram a French blog -- It was from a Renault display at a recent auto show.
It shows 3kW to 44kW 3Phase AC using a type 2 connector, 3 to 22kW 3-Phase AC using a new type 4 connector, 3 to 7kW on a type 1 and 3kW from a French wall plug. Also shows 50kW CHAdeMO which as far as I know, Zoe won't support. Or will it???
There was also a photo of a Zoe charging from a Type 3 plug. Let me see if I can find it.