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Author Topic: Consumed KWh versus Charging consumed Power  (Read 371 times)

gonespa

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Consumed KWh versus Charging consumed Power
« on: March 24, 2019, 05:27:19 PM »

Hi,

I think I read a post related to this, but since I am unable to find it I am opening a new one.

For the sake of curiosity I did a small test to compare what the Zero App says about the consumed KWh in a trip versus how much power the charger takes in order to get the battery SoC back to 100%.

I am surprised to find that, for a 70km trip the app says the bike consumed 3,63Kwh (from 100% to 52% SoC). I then connected the onboard charger to get it back to 100%, and I found that the Power consumed was of 6,1 Kwh. How is that possible? I assume the App is not giving the correct information since my battery has about 11,6Kwh of usable energy (it is the 13Kwh model) so the numbers should be closer to 6,1kwh than to 3,63Khw, isn´t it?.

Is this a known issue?
« Last Edit: March 24, 2019, 05:28:54 PM by gonespa »
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Richard230

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Re: Consumed KWh versus Charging consumed Power
« Reply #1 on: March 24, 2019, 07:10:59 PM »

It is a known issue that the app and the display don't agree when it comes to power consumed per distance.  Probably the best way to check power consumed when recharging is to use a Kill-A-Watt meter.
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Richard's motorcycle collection:  2018 16.6 kWh Zero S, 2009 BMW F650GS, 2020 KTM 390 Duke, 2002 Yamaha FZ1 (FZS1000N) and a 1978 Honda Kick 'N Go Senior.

MVetter

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Re: Consumed KWh versus Charging consumed Power
« Reply #2 on: March 24, 2019, 09:31:42 PM »

Also, just as a side note, the 13kW model is more like 10.6kW usable. That monolith is 104Ah. If you multiply that by the median voltage, 102, you get 10608, or ~10.6kW
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flattetyre

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Re: Consumed KWh versus Charging consumed Power
« Reply #3 on: March 26, 2019, 03:43:47 AM »

Yes, same issue on my app. The bike does of course consume more power during the charge and the charger is pretty efficient so it's not going to waste.

If you want to know exactly how much it's consuming put in a Cycle Analyst.
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gonespa

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Re: Consumed KWh versus Charging consumed Power
« Reply #4 on: March 26, 2019, 08:45:18 PM »

Yes, same issue on my app. The bike does of course consume more power during the charge and the charger is pretty efficient so it's not going to waste.

If you want to know exactly how much it's consuming put in a Cycle Analyst.

I was wondering if this is related to the household voltage (in my case 220v) versus bike battery voltage (in the low end of the 100)?. Or should I go back to school?. I would prefer an Ah value anyway.
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