I would like to workout how long my battery will discharge itself before a recharge is needed. I have dual NS70ZZ batteries running as a 24v setup and am planning to run my caravan lighting from these while free camping.
I have a Landcruiser 80 Series and wary of flattening the batteries.
To answer your question you need to look at the ampere hour rating of the batteries. This will be something like 110 AH. That means that if the battery is at full capacity it will supply 110 amps of electrical current for one hour.
In practice this is not true for AGM and many of the newer batteries that will suffer a shorter life if discharged below 50%. If you are running LED lighting you should last all night with your setup, most rigs will cut out after your battery gets below a set voltage.
Hope this answered your question.
Cheers
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Ex RAAF, now retired. EX Electrician/Teacher.
Homebase is Murray Bridge Tourist Park (in a cabin). New Horse.. 2020 Ford Everest Titanium, Jayco swan for touring.
Sunilshashi what a great idea, you have just roughly doubled the time you can have your lights on. Good luck and please be careful when you change from 24 to 12 volts. if you are not sure I would highly recomend you talk to an electrician.
__________________
Ex RAAF, now retired. EX Electrician/Teacher.
Homebase is Murray Bridge Tourist Park (in a cabin). New Horse.. 2020 Ford Everest Titanium, Jayco swan for touring.
Sunilshash you will need to add up the wattage times the hours used for each item to estimate your total requirements. Dividing the total watthours by 12 will give an estimate of the amphours required to meet your needs. Your battery bank needs to be at least twice the amphour rating of your needs to avoid excessive damage due to over discharge.
Sorry Philc but changing from 24 to 12 volts won't change how long the batteries last as the wattage of the lights etc. used in either case would be roughly the same.
I would like to workout how long my battery will discharge itself before a recharge is needed. I have dual NS70ZZ batteries running as a 24v setup and am planning to run my caravan lighting from these while free camping.
I have a Landcruiser 80 Series and wary of flattening the batteries.
Hi sunilhashi,
A question ! These batteries, are they your tow vehicle batteries or seperate house batteries.
The tow vehicle batteries have to be more protected than 50% discharge if you wish to start a diesel reliabily.
Perhaps you need to look carefully at the set up before rushing in. How to charge the 12v from the vehicle, for instance.
If the lights are 24v then they draw no more power than 12v lights for the same wattage.
