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Power drain Boxer X250
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userspospe
Posted: 9 March 2017 3:43 PM
Subject: Power drain Boxer X250
 


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Posts: 2163
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Location: Stockport Autosleeper Warwick Duo 2.2 130bhp


Out of interest I have carried out some power drain measurements on my 2014 build Auto Sleeper Warwick Duo with the 2.2 litre 130 bhp engine. I used a clamp meter for all readings and yes, I know that they are not the most accurate of devices at low current levels.

1) All doors closed, but not locked: 90 m/a initially with one to two second bursts of 160 m/a (every 30 seconds or so)

2) All doors locked, but alarm not set: 300 m/a initially, but dropping to 90 m/a within 10 minutes (with one to two second bursts of 160 m/a every 30 seconds or so)

3) All doors locked and alarm (with motion sensors) set: 475 m/a, but in minutes dropping to 300 m/a and eventually to 140 m/a (with one to two second bursts of 210 m/a every 30 seconds or so)

What these figures do indicate is that with the alarm set, my van uses about 3½ a/h per day and given that the starter battery is around 105 a/h, this translates into a flat battery in about 30 days.

The above is for members interest, I am not asking for advice, just passing on some interesting information which may explain some problems people have been having around the area of batteries.
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usercolin
Posted: 9 March 2017 10:19 PM
Subject: RE: Power drain Boxer X250
 


Lord of the posts

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Location: Bedfordshire, Globecar 636SB


You take 105ah out of a 105ah battery and it will be knackered, at the rates your showing the battery will be fine for two weeks, after that it is getting lower than is comfortable. After three weeks it won't be capable of starting the engine.
userspospe
Posted: 10 March 2017 11:00 AM
Subject: RE: Power drain Boxer X250
 


Forum master

Posts: 2163
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Location: Stockport Autosleeper Warwick Duo 2.2 130bhp


colin

Agreed.

The main culprit is the alarm system, without it the battery would last for about 50 days to completely flat. For what it's worth, the alarm fitted to my AS Warwick Duo is an Autowatch 695 system, but I have no idea how this compares to other makes of alarm for current drain.
userEJB
Posted: 10 March 2017 4:58 PM
Subject: RE: Power drain Boxer X250
 
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It's my long term experience that the vehicle battery, with an alarm on etc, requires a charge every 2 or 3 weeks when not used.
I don't think alarm or motorhome type make much difference.


Edited by EJB 2017-03-10 5:00 PM
userJohn52
Posted: 14 March 2017 7:07 AM
Subject: RE: Power drain Boxer X250
 


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Location: Pissindoon, Scotland


I previously posted that 12volt to mains voltage inverters do not draw current when switched off because the ones I tested didn't. But I have since bought another that does draw a small current when switched off. So I stand corrected
userspospe
Posted: 14 March 2017 12:11 PM
Subject: RE: Power drain Boxer X250
 


Forum master

Posts: 2163
20001002525
Location: Stockport Autosleeper Warwick Duo 2.2 130bhp


John52

You have prompted me to see what my Seeley 300 watt pure sine wave inverter draws from the 12 volt supply.

When plugged in and switched off .... nothing

When plugged in and switched on, but no load applied ..... 350 m/a

This equates to about 8½ a/h per day, just to run the inverter without any load being applied to it, so the message is obvious: don't leave your inverter plugged in and switched on if you are not using it to run something.
userbaden87
Posted: 19 November 2018 2:01 AM
Subject: RE: Power drain Boxer X250
 
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Location: Nottingham Autotrail 634L 2008 fiat Ducato x250


I didn’t realise you could get clamp meter for 12volt I thought they were only for 240v, where did you get it from and how much?
userspospe
Posted: 20 November 2018 10:11 AM
Subject: RE: Power drain Boxer X250
 


Forum master

Posts: 2163
20001002525
Location: Stockport Autosleeper Warwick Duo 2.2 130bhp


It came via Amazon:

Signstek UNI-T UT210E Handheld RMS AC/DC Mini Digital Clamp Meter Resistance Capacitance Tester

Sold by Victory Cyber Store and cost £35

A search for Digital Clamp Meter will give you plenty of choice, but make sure you get one which will do DC (many are AC only)
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