Battery Protector
Submitted: Tuesday, Dec 15, 2009 at 15:40
ThreadID:
74422
Views:
2755
Replies:
3
FollowUps:
1
This Thread has been Archived
Member - George (WA)
I have a battery protector, the type you plug into the car auxiliary socket and the fridge into the cigar holder. Here are the details
Battery - Delkor 100a/h deep cycle, maintenance free
The battery protector is supposed to cut the power to the fridge when the battery drops down to 11.2v (red light) and reconnect power when voltage reached 12.5v (green light)
Question - The battery now shows 10.85v with the fridge connected and still running, i.e. the battery protector still shows green light. However, as soon as I disconnect the fridge, the battery immediately comes back up to 11.34v.
So, at what point should the battery protector cut the power from the fridge ?
I hope to get some precise answers from a battery or auto electrical expert, not just guesses or opinions
Cheers
Reply By: Member - Andrew (QLD) - Tuesday, Dec 15, 2009 at 16:09
Tuesday, Dec 15, 2009 at 16:09
If it's similiar to the ABR one (
http://www.sidewinder.com.au/page90a.html) which mentions cutout at 11.2V (±0.3v)........10.9V, then it wouldn't be long i would guess :)
Might be worth contacting the distributor as i would imagine different designs work differently.
Andrew
AnswerID:
395152
Follow Up By: Member - George (WA) - Tuesday, Dec 15, 2009 at 16:17
Tuesday, Dec 15, 2009 at 16:17
Thanks Andrew, It is similar to the one sold by Sidewinder but this I bought from Jaycar
Cheers
FollowupID:
663591
Reply By: oldtrack123 - Tuesday, Dec 15, 2009 at 22:00
Tuesday, Dec 15, 2009 at 22:00
Hi George
If your battery is only returning to 11.34 volts it is very flat
The protecting IS NOT protecting,faulty????
To protect your battery for long life the protector needs to cut OFF @ no lower than 12v ,
Many go as low as 11.2v Which is virtually a flat battery unless load is @ end of a long run with a high voltage drop due to cable size.
AnswerID:
395215
Reply By: R&J Batteries - Thursday, Dec 17, 2009 at 08:22
Thursday, Dec 17, 2009 at 08:22
What are you measuring the voltage with? Is it accurate? Is your battery REALLY at 10.85V? Are you measuring the voltage at the battery terminals, or at the fridge? If I had a dollar for every multimeter that was uncalibrated, or wiring with excessive voltage drop...
From what you have described, I would say that the battery protector is not working, and your battery is now (very) flat.
Keep in mind that most battery protectors have a time delay of at least a few seconds to allow for a large load intermittently drawing the voltage down under the cutoff without disconnecting. Although that doesn't sound like the problem you have.
Best regards, Dave
AnswerID:
395380