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 Post subject: 24v to 12v dc converter
PostPosted: Fri Dec 20, 2013 5:48 pm 
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Came across this on eblag and I know that the topic of using 12v equipment in 24v trucks has come up in the past.

http://www.ebay.co.uk/itm/181230864736? ... 1423.l2649

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PostPosted: Sat Dec 21, 2013 3:13 am 
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there was a time (when MOD had more money) that they had these made up only with military markings on then not a socking great white label. They are brilliant items and I run my CB and car radio from them in my Fox and Ferret. Also have a cig lighter socket installed for the phone and GPS
mine however were £25 from Beltring (as was) so shows as ever that prices just go up not down

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PostPosted: Tue Jan 21, 2014 3:05 pm 
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The Alfatronix Powerverter range are also really good. Made in the UK and not cheap if you pay RRP. Full emergency vehicle spec etc

http://www.ebay.co.uk/sch/i.html?_odkw=alfatronix&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=alfatronix+24&_sacat=0

I've got several of the PV6s converters in various 24V LRs & trailers.

John


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PostPosted: Tue Jan 21, 2014 8:12 pm 
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Hi John,

Do you use the isolated or non-isolated versions, or doesn't it matter? I got myself an PV3i- RU variant that is sealed to IP65 which I'd intended to use for power a 35DLM8 dizzy in my 24V truck but I'm a little concerned that internally the dizzy's electronics maybe grounded. Does anyone have any idea if this is potentially a problem or if I'm being paranoid about having two earths?
70FL95 wrote:
The Alfatronix Powerverter range are also really good. Made in the UK and not cheap if you pay RRP. Full emergency vehicle spec etc

http://www.ebay.co.uk/sch/i.html?_odkw=alfatronix&_osacat=0&_from=R40&_trksid=p2045573.m570.l1313&_nkw=alfatronix+24&_sacat=0

I've got several of the PV6s converters in various 24V LRs & trailers.

John
Cheers,

Nick

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PostPosted: Tue Jan 21, 2014 8:22 pm 
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It shouldn't matter as long as its earthed. A simple circuit has a set voltage going in & an earth return. 24v will try & return through the circuit but it will be cut down to 12v by the inverter. The current will only flow in one way.

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PostPosted: Wed Jan 22, 2014 11:03 am 
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darksun wrote:
Do you use the isolated or non-isolated versions, or doesn't it matter? I got myself an PV3i- RU variant that is sealed to IP65 which I'd intended to use for power a 35DLM8 dizzy in my 24V truck


I use the non-isolated versions. In fact I have a PV10s powering the Pertronix ignition on the 101 and a PV6s powering the Britpart ignition module on the Lightweight. I was highly sceptical about the Britpart module (especially because it only cost £12), but its been working fine for ~5 years so far :-)

John


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