[Ovmsdev] Power Draw

[Mark Webb-Johnson]

Attached is a recent posting here with some readings from Glyn and myself.

Regards, Mark.

> Date: Wed, 23 Oct 2019 21:31:16 +0800
> From: Mark Webb-Johnson <mark at webb-johnson.net <mailto:mark at webb-johnson.net>>
> To: OVMS Developers <ovmsdev at lists.openvehicles.com <mailto:ovmsdev at lists.openvehicles.com>>
> Subject: Re: [Ovmsdev] OVMS V3 power consumption readings
> Message-ID: <29BFF543-9FDC-4EF7-A8B8-1F8ED92FCDD8 at webb-johnson.net <mailto:29BFF543-9FDC-4EF7-A8B8-1F8ED92FCDD8 at webb-johnson.net>>
> Content-Type: text/plain; charset="utf-8"
> 
> Glyn,
> 
> Powered exclusively by ext12v, @12v, I get:
> 
> Wifi off/sleeping: 25mA
> Wifi only: 49mA
> Wifi + 3G: 85mA
> 
> Powered exclusively by USB, @5v, I get:
> 
> Wifi off/sleeping: 46mA
> Wifi only: 104mA
> Wifi + 3G: 180mA
> 
> Note that in areas of low signal, the 3G power consumption can be higher. Similarly, if GPS is enabled that can have an affect as well. I?ve never seen it go over about 220mA (and even that was just for short bursts).
> 
> If I power it from both USB and 12V simultaneously, I get:
> 
> Wifi off/sleeping: 8mA (USB 5v) and 19mA (ext 12v)
> Deep sleep: 8mA (USB 5v) and <1mA (ext 12v)
> 
> (The 8mA is mostly from the CP2102 which is powered off when not in use)
> 
> Regards, Mark
> 
>> On 22 Oct 2019, at 2:41 AM, Glyn Hudson <glyn.hudson at openenergymonitor.org <mailto:glyn.hudson at openenergymonitor.org>> wrote:
>> 
>> I've just measured the power consumption of the OVMS V3 module using a
>> bench power supply set to exactly 12.0V.
>> 
>> OVMS consumed:
>> 
>> 60mA = 0.72W with WiFi on (AP active) and GSM/GPS modem off
>> 100mA = 1.2W with everything switched on.
>> 
>> This is less than I was expecting, I would take weeks for OVMS to
>> drain a healthy lead acid battery.
>> 
>> --
>> All the best,
>> 
>> Glyn Hudson
>> +44(0)1248672607
>> 
>> https://openenergymonitor.org <https://openenergymonitor.org/>
>> https://zerocarbonadventures.co.uk <https://zerocarbonadventures.co.uk/>
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> On 11 Nov 2019, at 10:50 PM, Fran Terry <fajterry at gmail.com> wrote:
> 
> Hello One and All.
> 
> Sorry if this question has already been asked, how much current draw does one expect from V3?
> 
> Thanks
> 
> Fran
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