I will use a fridge, lights, radio and a mover, plus charging phones/iPad. Would a battery last 4 nights if that was my typical use? Is the answer no problem yes, probably yes, maybe yes, probably not or not a chance?
If you have used the motor mover you will have eaten a big chunk of available power.
Fridge will kill a battery in no time, use fridge on gas
LED lighting will use about 15% of the power of incandescant lamps.
A whale underfloor heater uses approx 1A that is 55 hours to 50% of a 110 AH battery
A 20w (2 x 10W halogen capsules)lamp uses approx 1.5A
Radio will take about 1.5A at moderate volume
So say a 50% duty cycle on heater=0.5A
25% duty on lighting =0.5A
50% duty on radio = .75A
total amps = 1.75A
battery to 50% = 31.5 hours
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You cannot power the fridge from the caravan battery.
I would suggest that you site the van using the car and keep your battery for essential use only. IE Lighting, water pump and radio.
If you keep to these then Yes, probably.
Quote: Originally posted by TTurtle on 12/4/2014I will use a fridge, lights, radio and a mover, plus charging phones/iPad. Would a battery last 4 nights if that was my typical use? Is the answer no problem yes, probably yes, maybe yes, probably not or not a chance?
Depends how good your battery is and what amperage .
For starter's YOU CANNOT run fridge direct of your battery , the only time a fridge is powered of 12volt is when connected to a car with appropriate 12s socket or 13 pin if newer .
If you avoid using a TV and run your water pump and lights sparingly you should be OK assuming your battery is healthy .
Make sure your fridge will fire up on gas and heat your water the same way
As already mentioned, you can't run a fridge from your leisure battery so you will need to use gas for that, as well as for heating and hot water, although depending on your van, some of the displays may use 12v power but this would be minimal.
LED lights use very little power so it may be worth considering changing to these if you plan to use 12v lighting regularly or for prolonged periods.
Motor mover will eat battery power so use the tow vehicle to site your van.
Consider taking a portable radio - the solar ones are pretty good and 'free' to run!
I can use my caravan for a week using just the leisure battery for the lights but I have a large battery in good condition and only 2 LED strip lights in my van.
If your usage is careful and your battery is in good condition and fully charged then, yes, your battery should last 4 days.
Good Morning. I have done loads of rallying totally dependant on the battery. 4 days no problem if you use it only for esssentials. Assuming you have a 110amp battery in GOOD CONDITION.
1. Run fridge on gas (as previously stated it will not run on caravan battery)
2. Use lighting sparingly, one light on at any given time.and change the incandescent bulbs to LED.
3. The pump uses a fair amount of battery so use sparingly.Fill a kettle from the campsite water supply and boil it on the hob on hob for washing up.
4. MOTOR MOVER?, You must be joking, forget it.
5. Phone chargers are ok, very little drain from them.
6. Put batteries in your radio then it is independant of your battery.
Do this and your battery will last, no problem. Good luck
Fridge depends on what it is i.e. compressor or 3 way. A compressor fridge will need to run off the battery and cut the batteries usage time.
I have a compressor fridge and think you would be very lucky to last 4 days, without using a decent solar panel to top the battery up.
The van we had that had a compressor fridge in it, also had a 60w solar panel on the roof. Wild camping as we did with this van and using only those electrics that were essential, we were lucky to get 4 days use without recharging the battery with a long run while towing.
Actually wild camping really necessitated using a site every two or three days so that we could empty the loo, refill our water tanks and recharge the battery.
We tried it on a rally site where there was no EHU, but the battery gave out after 3 days. Just not sunny enough to recharge the battery.
I don't have an alarm and my caravan is kept at home but I'm sure someone who has more idea will come along to give you a more precise answer.
However, it will depend on how good the battery is, and what its capacity is. For instance a 110ah battery will last much longer than an 80ah battery, so you will need to know what battery you have, and how old it is to get an accurate answer.