Mark, Tom,

nice to see you're including this now in the standard.

Please reserve two time values (vars and fields for the protocol) to also cover my charge time prediction for the Twizy.

I've got two times on the Twizy because I calculate the estimation for both a desired SOC (set by the user via the "CA" command) and for 100%.

I think this should be OK for all vehicles, as many drivers do partial charges intentionally. If a desired SOC cannot yet be set, the estimation could use 80% as a default, as this is normally the end SOC for fast charging.

The protocol should also include the desired SOC in percent so the App does not need to query other data to interpret the value.

Regards,
Michael

Am 17.04.2013 13:31, schrieb Mark Webb-Johnson:

Tom's CTP algorithm is in my Tesla Roadster, and I've just started the first charge with it:

2013-04-17 06:59:39.975150 -0400 info main: #71 C EV915 rx msg S 79,K,3,0,prepare,standard,246,222,56,0,100,0,7,13,0,0,0,-1,156.78,-1

2013-04-17 07:04:32.207360 -0400 info main: #71 C EV915 rx msg S 79,K,220,0,charging,standard,246,222,56,0,100,0,5,1,0,0,0,-1,156.78,-1

2013-04-17 07:04:32.208899 -0400 info main: #71 C EV915 rx msg S 79,K,220,0,charging,standard,248,224,56,0,100,0,5,1,0,0,0,-1,156.78,-1

2013-04-17 07:09:10.003015 -0400 info main: #71 C EV915 rx msg S 82,K,218,56,charging,standard,258,232,56,9,100,2,5,1,0,0,0,-1,156.78,38

2013-04-17 07:19:08.396430 -0400 info main: #71 C EV915 rx msg S 86,K,218,56,charging,standard,269,243,56,19,100,4,5,1,0,0,0,-1,156.78,27

Prediction is the last column: 38 minutes given 56 amps @ 220 volts, 24 - 27 celcius ambient, with about 80km (50 miles) to put into the pack.

Exciting times ahead, with alternative charge control mechanisms.

Regards, Mark.
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