[chbot] Deep Cycle Batteries for caravan

[Richard Jones]

I have an AmpTech 12V 120AH about 9 years of age that I can recommend apart
from its weight. Regrettably I had to leave the battery fully discharged on
my yacht through June and July and now it is sufficiently recovered to
start a 13HP marine diesel engine which it is not designed to do. I have no
idea yet what capacity remains. The starter battery alongside it that
suffered the same treatment is wrecked.

Link to Deep Cycle Battery Photo: https://goo.gl/photos/MGp3mjpznUfSQQWq8

Link to battery specification:
http://www.superchargebatteries.co.nz/product-range/others/amp-tech/

This jump starter got the engine going and saved me 3 days removing
batteries, charging and re-fitting:

https://www.aliexpress.com/item/2015-New-Arrival-High-Capacity-68800mAh-Car-Jump-Starter-Mini-Portable-Emergency-Battery-Charger-for-Petrol/32458701989.html

I am in the process of fitting a voltage sensitive relay that will separate
the starter battery and the deep cycle house battery when the engine is not
running. The VSR draws 10mA quiescent which is easily covered by the solar
charger.

Link to VSR:
https://www.jaycar.co.nz/140a-dual-battery-isolator-vsr/p/MB3685

Cheers

Richard Jones

On Thu, Aug 24, 2017 at 12:49 PM, Henri Shustak <henri.shustak at gmail.com>
wrote:

> If you are seeking a charge controller typically the more expensive units
> are worth the money (if you value reliability and long battery life). The
> previous comment from Steve regarding LiFePO4 is an excellent point.
>
> I will add that you may want to look at Lead Carbon batteries. Assuming
> your charge controller is able to re-configured to support them. They are
> hard to beat for the price. As long as weight is not a big deal they are
> really a good option for this kind of application. They will do well even
> if discharged deeply and they offer excellent cycle life.
>
> All that said, if you are not cycling them a lot, then a typical deep
> cycle gel cells are probably going to work out to be less expensive.
>
> Happy to assist with sourcing any bits for this project, then just flick
> me a message back.
>
>
> --------------------------------------------------------------------
> HTRAX 2013 Revitalised : EGYPTIAN HUMP HTRAX : Direct URL download :
> http://henri.shustak.org/download/htrax/egyptian-hump-htrax.mp3
> "Dr Who Meets B52's" - More reviews : http://www.jessetaylor.com.au/htrax
>
>
>
>
> > On 23/08/2017, at 5:02 PM, Rob de Voer <rob at businesspalz.com> wrote:
> >
> > Hi,
> >
> > Seeing the discussion regarding batteries reminded me to sort my caravan
> out.
> >
> > I just got a caravan and need to get one or more deep cycle batteries
> (hooked up to solar panels).
> >
> > Batteries are expected to supply several 12v lights and USB chargers
> plus a 300W invertor (typically supplying about 100W to mini fridge).
> >
> > Any brands to stay away from or recommended?
> >
> > Also open for suggestions to buy them from.
> >
> >
> >
> >
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