ebispacher heater 24-12v

[idoltyme]

i have an ebispacher heater 24v but the boat runs on 12v does any one know a way around this or how i can change it to 12v please any help very much aprecheated (speling not that good but you know what i meant)

<hr width=100% size=1>

 

[andyball]

previous threads here

<hr width=100% size=1>

 

[Trevethan]

Simple answer is add another battery. transformers are too expensive.



<hr width=100% size=1>

 

[penfold]

I've had the same idea a few times, but never did anything about it. The best theoretical solution that I came up with was to use a pair of small motorcycle batteries to supply 24V to a dedicated circuit for the heater. The batteries are then charged using a fairly low power 12-24 converter (say 1-2 amps, enough to keep up with the heater's running current) which can be had at about £50 (Radio Spares). The batteries can easily cope with the glow plug load, so bob's your auntie, metaphorically speaking. Never done it in practice though, so I claim no responsibility for things going up in smoke!

cheers,
David

<hr width=100% size=1>What in the wide, wide world of sports is goin' on here?

 

[uforea]

I ran a 24v heater for many years on my boat which was 12v for everything else.Simply add another 12v batt. which is coupled in series to the domestic supply batt. the only slight problem is charging the extra batt. which cannot be in the normal 12v circuit. In practise I found that a good batt. well charged initially would last nearly a whole season. If I thought that it was getting a bit soft I would swop it with the domestics batt. which then brought it into the charging circuit. 24v heaters can be bought from lorry scrap yards for about £100 and come complete with all controls piping etc. so it is worth a little inconvience for the amount of cash saved.

<hr width=100% size=1>

 

[tome]

Nice idea, but I fear you'd have wasted £50 as the output of the converter would not give sufficient voltage for charging (it needs to be at least 28V).

The only way I can think of doing this is to have a dual-gang two-way switch capable of handling at least 60A (for charging) or else 2 battery switches: one two position and one on/off. You could use this for switching the batteries between parallel (charging) and series (running Eberspacher). HOWEVER, without an interlock or fuses it would be very dangerous as you could short a battery with disastrous consequences (think explosion or major fire).

Alternatively you could use a 24V mains battery charger and live with frequent replenishment or fit an additional 24V alternator.

Tom

<hr width=100% size=1>

 

[claudio]

Good idea, 12V to 24V step up battery chargers are easily available!



<hr width=100% size=1>