Vehicle battery not charging on EHU

by Taurian Tue Nov 08, 2016 10:32 am

Iv'e got the van on hook up on a timer to charge batteries for 6 hours a day, but I've just discovered that my vehicle battery does not seem to be charging when on electric hook up although the leisure battery is being charged. I suspect that it could be a relay problem but, not having any experience of relays (and undoubtably not recognising one if I tripped over it), where would I find the vehicle battery relay and once found, how would I test it ?? There's nothing on the control panel that has to be set in any way is there? Not had anything to do with vehicle electrics in the past so don't want to make matters worse by playing around with it. Vehicle is a 2003 Symbol.

by Paulmold Tue Nov 08, 2016 10:43 am

If I remember correctly from my Symphony days, the engine battery is not charged when on hook-up. Your best bet would be to fit a battery-master or a solar panel (portable one connected to the battery direct or through cig lighter if permanently live).
But your Symbol is a lot newer than my Symphony was and you may have a later control panel that may have a means to charge both batteries.

by Taurian Tue Nov 08, 2016 11:13 am

Hi Paul,

I didn't know that - I thought both batteries were charged on hook up. I've put the vehicle battery on a trickle charge with a Gunson charger for now.

Ian

by Machloop Tue Nov 08, 2016 11:38 am

When we had a Duetto, the batteries were both under the bonnet, so I made a length of thin wire with a crocodile clip on each end to run from the positive lug on one battery to the positive plug on the other. I fitted a 15 amp fuse in the middle of the wire and when on EHU with this fitted both batteries were charged. You just need to remember to remove before starting the engine so I made a card to go on the dash to remind me that it was there.

by Peter Brown Tue Nov 08, 2016 1:10 pm

The 230v charger only charges the leisure battery. When the engine is running the alternator charges both.

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is the way to go. There are other supplier with similar products

by Taurian Tue Nov 08, 2016 1:32 pm

Thanks Peter - I have just learned that today. Hopefully, now that I'm going to keep the battery on permanent trickle charge whilst I'm not using the van so much during the winter, I will have saved the expense of a new battery ! I like the idea of the Battery Master but will try and save that expense at the moment. Perhaps if I'm a good boy, Santa may bring me one. smile!

by Peter Brown Tue Nov 08, 2016 1:39 pm

I don't recommend leaving on permanent trickle charge. The electrolyte will gass off causing the plates to overheat and warp, destroying the battery. Charge for 6 - 8 hours once a week of fortnight.

by Gromit Tue Nov 08, 2016 1:45 pm

I don't know if this is any good. It's quite a bit cheaper than the VanBitz item, but a waste of money if it doesn't do the job.

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Peter will know.

The VanBitz Battery Master certainly works very well indeed. Fit and forget!! allthumbz

by Taurian Tue Nov 08, 2016 1:48 pm

Peter Brown wrote:I don't recommend leaving on permanent trickle charge. The electrolyte will gass off causing the plates to overheat and warp, destroying the battery. Charge for 6 - 8 hours once a week of fortnight.

OK thanks for the tip. I'll do as you suggest.

by KeithM Tue Nov 08, 2016 1:50 pm

and to save having to remember, buy a cheap plug in timer.

example here: [You must be registered and logged in to see this link.]

by Taurian Tue Nov 08, 2016 1:53 pm

KeithM wrote:and to save having to remember, buy a cheap plug in timer.

example here: [You must be registered and logged in to see this link.]

Good idea - I've got a few of those knocking about the house!!

by KMRTOPAZ Tue Nov 08, 2016 11:47 pm

I'm surprised that a 2003 Autosleeper doesn't charge both batteries on EHU.
I had a Topaz earlier than 2003 that did !
Can you tell us which control panel was fitted please.
Keith

by Taurian Wed Nov 09, 2016 8:14 am

KMRTOPAZ wrote:I'm surprised that a 2003 Autosleeper doesn't charge both batteries on EHU.
I had a Topaz earlier than 2003 that did !
Can you tell us which control panel was fitted please.
Keith

It's a Plug-in System control panel Keith. No model number visible on front.

by Peter Brown Wed Nov 09, 2016 8:41 am

KMRTOPAZ wrote:I'm surprised that a 2003 Autosleeper doesn't charge both batteries on EHU.
I had a Topaz earlier than 2003 that did !
Can you tell us which control panel was fitted please.
Keith

This option was not available as standard in any AS until the introduction of the Sargent EC500 system circa 2012. The 2003 model must have had an after sale modification such as the addition of a battery master to charge both batteries at once from the EHU. Earlier Sargent systems allowed you to charge either the leisure battery of the vehicle battery but not both at once unless connected to a solar panel.

by Alf Wed Nov 09, 2016 12:42 pm

I have used on of these Stirling Battery Maintainers from RoadPro on our last 4 vans easy to fit and easy to move over onto your next van reasonable price as well

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Alf

by artheytrate Wed Nov 09, 2016 3:35 pm

This is the simplest one wire to leisure positive, one wire to cab battery positive and one wire to common earth.

John.

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by Paulmold Wed Nov 09, 2016 4:19 pm

I think all these wire the same way.

by rgermain Wed Nov 09, 2016 4:45 pm

I agree with Peter, my 57 reg Topaz did not charge both batteries.

by KMRTOPAZ Wed Nov 09, 2016 5:52 pm

I have a 55 Topaz with a three position switch on the control unit. During a previous thread covering this issue, I took a voltmeter out and measured battery voltages 'off' and 'on' EHU in all three switch positions. The readings showed that the switch directed charge to the battery selected only. Either vehicle or hab. Evidenced by raised voltage (13v plus) at the chosen battery. In the centre position it also showed a raised voltage on both batteries, but lower than the 13v plus when a single battery was chosen.
I concluded, and advised readers, that the centre position would not be an efficient choice.
The fact remains that it is capable of charging both batteries on a Topaz earlier that 57 or 2012.
I cannot remember the controller used on my previous Topaz, and being second owner, it may have been fitted earlier with a non-standard, possibly aftermarket unit, but it was capable of charging the vehicle battery.
Keith

by -mojo- Wed Nov 09, 2016 6:53 pm

KMRTOPAZ wrote:In the centre position it also showed a raised voltage on both batteries, but lower than the 13v plus when a single battery was chosen.

That's interesting, because I see something similar on the Celex - which also has a Sargent power controller - in that if I select the vehicle battery as the target to be charged, I also see a slight rise in the voltage of the leisure battery. I've no reason to suspect that it's faulty, so I guess on mine there is an unintended link between the two circuits within the power supply. Whether the link in my case is enough to actual provide any meaningful charge to the leisure battery I don't know.

by logburner Wed Nov 09, 2016 10:25 pm

Had the same problem......Leisure battery only charging when on EHU. Solved mine also, with CSB2 from RPS Leisure, for £21.99.
Just a 3 wire connection, now once leisure battery is charged, it then trickle charges the vehicle battery. up!

Vehicle battery not charging on EHU