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Anyone with electrical knowledge

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Anyone with electrical knowledge

Postby mjsroofing » Sat Mar 10, 2018 7:52 pm

So I've got an 240v inverter set up in the van.
I've always used just the one battery to power it but now I fancy two batteries which I'll put in parallel so they last longer.

Question is can I run these batteries in parallel and in series somehow so I can run my 24v heater off it directly instead of using my 12 to 24v inverter.

I can't see a way of doing it but might of missed something.
www.mjsroofing.co.uk
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Re: Anyone with electrical knowledge

Postby axam102 » Sun Mar 11, 2018 11:25 pm

Your best running them with a spit charger and plugging your 12v inverter of the split battery, you will need a leisure battery as your secondary to cope with extended draws. split charger is around 40 quid and a good 120AH battery is 140 quid. the problem you will face is starter batteries are not built for prolonged current draws and will die quick
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Re: Anyone with electrical knowledge

Postby mjsroofing » Mon Mar 12, 2018 8:54 pm

axam102 wrote:Your best running them with a spit charger and plugging your 12v inverter of the split battery, you will need a leisure battery as your secondary to cope with extended draws. split charger is around 40 quid and a good 120AH battery is 140 quid. the problem you will face is starter batteries are not built for prolonged current draws and will die quick


Not being ungrateful, but I know all that, I've had inverter in van for years, intelligent split relay charger etc etc.
It's the series and parallel but I need info on.
www.mjsroofing.co.uk
2009 2.2 tdci 115ps just over 51k and sweet as a nut ( so far )
2002 2.0 tddi 100ps. Over 205k still sweet . Now owned by Jay.
2001 escort van 75, 1.8 turbo intercooler. scrapyard heaven
1995 escort van 50, 1.8 straight diesel, scrapyard heaven.
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Re: Anyone with electrical knowledge

Postby andz327 » Mon Mar 12, 2018 9:02 pm

Sell the 24v and buy a 12v heater
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Re: Anyone with electrical knowledge

Postby mjsroofing » Tue Mar 13, 2018 9:58 pm

andz327 wrote:Sell the 24v and buy a 12v heater


Yes. That would be nice.
www.mjsroofing.co.uk
2009 2.2 tdci 115ps just over 51k and sweet as a nut ( so far )
2002 2.0 tddi 100ps. Over 205k still sweet . Now owned by Jay.
2001 escort van 75, 1.8 turbo intercooler. scrapyard heaven
1995 escort van 50, 1.8 straight diesel, scrapyard heaven.
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Re: Anyone with electrical knowledge

Postby APH » Thu Mar 22, 2018 1:15 am

do you need to use 12V and 24V together, or just one or the other? easy through a large change over switch, but harder if you need both at once :wink:

Andy :D
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Re: Anyone with electrical knowledge

Postby mjsroofing » Thu Mar 22, 2018 7:08 am

APH wrote:do you need to use 12V and 24V together, or just one or the other? easy through a large change over switch, but harder if you need both at once :wink:

Andy :D


I was hoping to use both at once. I couldn't see a way of doing it but was hoping that I was missing something.
Think andz is right though, I might have to splash out on a new heater.
www.mjsroofing.co.uk
2009 2.2 tdci 115ps just over 51k and sweet as a nut ( so far )
2002 2.0 tddi 100ps. Over 205k still sweet . Now owned by Jay.
2001 escort van 75, 1.8 turbo intercooler. scrapyard heaven
1995 escort van 50, 1.8 straight diesel, scrapyard heaven.
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Re: Anyone with electrical knowledge

Postby the dutch guy » Mon Apr 02, 2018 9:48 am

in order to make a proper setup you need to ask this:

how much power does the 24v heater use and how long do you need to let it run?
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Re: Anyone with electrical knowledge

Postby dumper » Mon Apr 02, 2018 1:15 pm

On a 24 v Hgv we had starting problems it turned out that the driver ha wired a 12v radio into one battery I can’t remember if it killed the battery but the only way to sort it out was to fit 12 v to 24 v inverter I think modern trucks now have a 12 v feed in the cab
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