Lunar stellar battery size

[Biggles]

Hi we recently bought our first caravan for 10 years . Can anyone please tell us the size of battery for a 2010 lunar stellar .
At present it's only got a small car battery on it
Thanks Darrin

 

[otherclive]

Hi we recently bought our first caravan for 10 years . Can anyone please tell us the size of battery for a 2010 lunar stellar .
At present it's only got a small car battery on it
Thanks Darrin

I would most likely take a 100-110amhr leisure battery if it has a standard battery box. Best measure the box then look on internet battery suppliers as they give the dimensions of the battery and details of the terminals.

 

[Mr Plodd]

Do you mean physical size, or amp hour capacity?

 

[Jcloughie]

It depends on what use you want to put it to. If you intend to use a mover, and/or go off grid, then as big as possible. Mover only, about 80 amps. Neither, then 20 amp would suffice.

But you will be limited to the physical size of the locker.

John

 

[Beardy]

As @Jcloughie says, how you use the caravan should dictate the battery size you need. My caravan came with a 110AH battery but it was on its last legs. I happened to have a good 80 AH car battery in the garage (removed from a car I scrapped) so I put that in the caravan. I only stay on sites with EHU so I only really need it for my motor mover to hitch up and maneuver on to pitch sometimes. 80AH is probably overkill for my needs, if i was buying another battery I'd probably drop to 40-50 AH. An added advantage is the weight saving over a bigger battery.

If you plan on staying off grid you'll need a bigger battery, but if you're staying more than a couple of days at a time you'll likely need some means of charging it as well.

 

[trevormonty]

I recently test Motor Movers with 8Ah(96wh) Li motorbike starter battery (poweroad PLFP-30L) had no problems moving it over a few meters. Didn't have time test further. These batteries are designed to deliver 400A so 20-80A of MM is no problem. Small capacity shouldn't be issue for few minutes they are typically used. At <2kg very light option if you only need battery for MM. Worth trying if you have access to free one like I did.
NB being drop in replacements for lead acid batteries will work with existing charger just check rates, one used recommended 4-16A charger. I'd still be incline to disconnect once charged.

 

[ProfJohnL]

NB being drop in replacements for lead acid batteries will work with existing charger just check rates, one used recommended 4-16A charger. I'd still be incline to disconnect once charged.

As you point out the battery chosen should be capable of accepting the chargers maximum current delivery. There is a danger the battery might overheat if it is charged too quickly.

But once a battery has reached its full charge, the more modern battery chargers reduce their output from high or "Bulk" charging rates to a much lower "maintenance" rate usually limited by the chargers reduced output voltage.

The batteries 100% charged standing voltage is determined by the the type of chemistry in the battery and will be the same for any size of "12V" battery using that chemistry. Provided the charger can be configured for the type of battery chemistry, there should be no reason to disconnect the battery once it has reached full charge.

But equally there is no harm in disconnecting, except it might be forgotten, or disconnected at the wrong time leaving the battery with less charge than you think and it might not have enough charger to complete your manoeuvring when you want it.