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DISCO3.CO.UK > Camping, Caravanning and Holidays

Unusual readings from leisure battery.

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THUB

Member Since: 10 Dec 2005
Location: West Berkshire.
Posts: 717

2012 Discovery 4 TDV6 HSE Auto Nara Bronze

Unusual readings from leisure battery.

This afternoon I removed the leisure battery from the caravan. The display on the CEC system in the van was showing 13.8 volts shows this most of time other than when having used the motor mover. Switched everything off and disconnected the battery. Took it into the garage and read the voltage with the multimeter 16.29 volts . About 6 hours later, i.e this evening it read 18.8 volts I checked the multimeter on SWMBO's mini and multimeter was showing 14.4v. So I assume meter is OK . Any ideas on these weird readings? I will obviously check again in the morning if it has not gone bang!

28th Jan 2017 8:52 pm

Sloss

Member Since: 18 Aug 2013
Location: Aberdeenish
Posts: 1691

To me that's a meter problem unless the battery is heating up a lot.

A nominal 12v battery in quiescent mode might, just might show 13v but 18.8v is difficult to visualise as that's 150% of nominal.

14.4v on the Mini - I assume engine off as you don't say, is far too high too. Stew,

2010 D4 gone but I really loved it
Went back to Merc - C350 AMG

Last edited by Sloss on 28th Jan 2017 10:01 pm. Edited 1 time in total

28th Jan 2017 9:42 pm

THUB

Member Since: 10 Dec 2005
Location: West Berkshire.
Posts: 717

14.4v on mini with engine off! Will investigate the meter in the morning. Thanks for comments.

28th Jan 2017 9:57 pm

lynalldiscovery

Member Since: 22 Dec 2009
Location: Maidstone
Posts: 7274

2006 Discovery 3 TDV6 Metropolis LE Auto Bonatti Grey

Had same debate with mate at work ref battery voltages he said them two batteries I took off last night are okay, ones reading 13.4 and the other 14 volts, I said thats impossible after standing for 12 plus hours, then he showed me his mulitmeter

I swear he got it from a christmas cracker

29th Jan 2017 9:05 am

THUB

Member Since: 10 Dec 2005
Location: West Berkshire.
Posts: 717

Assumptions that the multi meter was wrong proved to be correct. Borrowed neighbour's meter all normal readings. Changed internal battery on my multimeter and all now OK. My multimeter did not come from a Christmas cracker but is probably 40 years old. Thanks for all the comments.

30th Jan 2017 10:40 am

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