Wind Turbine ?

SquirrellCook

Full Member
The engine Start Battery(s) should not be draining when vehicle off unless there is a leak somewhere or something left on, surely ?
It's a bigger Mercedes thing, though my 608 never suffered from it. They have an isolator switch for the batteries, but when it's switched off neither the alarm or doors work. The funny thing is, the colder it gets the more it consumes. The Plaxton has it too, though I don't think everything is isolated. The tacho will take some, but that should milliamps.
 

wildebus

Full Member
The engine Start Battery(s) should not be draining when vehicle off unless there is a leak somewhere or something left on, surely ?
Thing is a modern vehicle is never "off".
Check off the following items you may or may not have ....
Radio (if not correctly installed, a newish radio with Bluetooth can really suck a battery even when "off")
Tachograph
Clock
Alarm
Proximity Sensors (for auto key detection)
Central Locking
etc.
 

RAW

Full Member
Alarm/immobiliser/central locking/radio etc all drain engine battery even with ignition off.
I suppose that is true on newer vehicles though on self-builds and older vehicles:
  • No alarm
  • No immobiliser
  • No central Locking
  • Radio Isolated
Those 4 points are the case with mine anyway.
Also I would think that even on newer vehicles you won't drain the battery if parked for two weeks or so by design. At least on Qashqai we had when parked at Airport was fine to start after two weeks, notably not a MH but had all the factors you mention. I would have though on past decade of Van builds that Alarm/immobiliser/central locking/radio should not flatten a starter battery enough to not start if Vehicle left for up to two weeks.
 

SquirrellCook

Full Member
Whatever it is, it behaves like a big capacitor is being charged. You can even watch it on the BMV.
I removed all the radio gear from when it was an ambulance. New alternator. New starter motor. Still not found it.
I've asked Mercedes and they don't have an answer for what it is.
Easy answer is to move the door and alarm power supply to the other side of the master switch.
 
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RAW

Full Member
Whatever it is, it behaves like a big capacitor is being charged. You can even watch it on the BMV.
I removed all the radio gear from when it was an ambulance. New alternator. New starter motor. Still not found it.
I've asked Mercedes and they don't have an answer for what it is.
Easy answer is to move the door and alarm power supply to the other side of the master switch.
Do you have one of these ?
https://www.ebay.co.uk/itm/UNI-T-DIGITAL-UT210E-100Amp-600V-AC-DC-CLAMP-METER-Multimeter-True-RMS-VFC-diode/283627864096

Or similar?

You could put clamp over positive and see if leak from there or negative and leak from there on starter battery ?
Might help with some diagnosis ?
 

SquirrellCook

Full Member
That would have been another solution, but it's interesting watching the current drain depending on what your doing. I should have should have fitted a BMV earlier, but it was a pain to install. It might turn out it's the power doors, but I wouldn't have thought it would have been designed with a relay energised all the time.
 
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RAW

Full Member
The BMV will show what's happening with the battery in terms of drain / SOC etc but won't be able to help much with diagnosing where the drain is coming from.

If you are thinking of selling Murky still (I would think Murky is the vehicle we are talking about here) then I'd be happy to come over to Doncaster and have a look, or if you are going to Green Frog, could meet there ?
 

SquirrellCook

Full Member
Thank you very much for the offer, but at the moment we struggle to work out what's happening from one day to the next. I'm hoping to brake our rally virginity at Hereford, if I can gain some control by then. Before then I have some errands to do in Dorset and then onto Somerset. I'd like to have the solar panels rearranged by then. Maybe swap out the old battery chargers for some Victron ones. Too many plans, not enough time and duff weather. Oh well.
 

wildebus

Full Member
Thinking about it more I wonder if something could be done with an array of computer fans facing forwards and that would charge the battery as you drive, be additional to the Split Charge Relay on the Battery banks if the battery bank was large and required a lot of energy to charge. Maybe a complete waste of time.

Looks like I will be saving up for some flexible Solar Panels to add to Sylvia's Roof then as just with a WiFi Dongle, Raspberry Pi and the Victron Measuring devices my main battery is down to 50% after 10 days or so of being parked up.
here is a similar question .... https://community.victronenergy.com/questions/35090/building-a-wind-turbine-battery-charger-using-the.html
 
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wildebus

Full Member
blooming windy today and stuff is getting blown around the garden.
Checked my weather station and wind speed has peaked at 30MPH. Now considering most small wind turbines seem to require a wind speedof around 25MPH to achieve full power, I don't think I would want to be parked up in a place where I can get that!

I was kinda considering getting a small wind turbine to play around with, but don't think I am going to bother considering the above.

Now what COULD be an interesting project ... How about Water Turbines?

1578415688879.png
or maybe .....
1578415776604.png



park near a river and drop in a water turbine/paddle and get some power while there 24/7 :D
 
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RAW

Full Member
blooming windy today and stuff is getting blown around the garden.
Checked my weather station and wind speed has peaked at 30MPH. Now considering most small wind turbines seem to require a wind speedof around 25MPH to achieve full power, I don't think I would want to be parked up in a place where I can get that!

I was kinda considering getting a small wind turbine to play around with, but don't think I am going to bother considering the above.

Now what COULD be an interesting project ... How about Water Turbines?

View attachment 1928 or maybe ..... View attachment 1929


park near a river and drop in a water turbine/paddle and get some power while there 24/7 :D
Looks interesting - I found out about these people sort of by accident
 
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