[C320-list] Inadequate Dedicated Starting Battery

[Graeme Clark]

Troy
 My understanding is that 12.2v is 50% charge, when measured resting, I.e NOT under load. I would have no qualms taking a battery to 12.0v when it IS under load as I would expect that to recover to well over 12.2v after a test of 20 minutes or so.

When I start my diesel heater (which draws about 25A for thirty seconds or so) the voltage temporarily dips waaaaay down, so much so that sometimes it refuses to start!

I think also most fridge compressor controllers have a low voltage cut out set at around 11v.  I assume this is set low to allow for the temporary dip in voltage whilst loaded?

Hope this helps

Graeme
#366, 1996

Sent from my iPad

> On 9 Dec 2021, at 22:59, Troy Dunn <troutwarrior at gmail.com> wrote:
> 
> Joe
> 
> 12.00V is a really low depth of discharge for any lead acid battery under
> load including AGMs.   Consider using a higher voltage like 12.20V if you
> want to extend the life of your batteries.
> 
> Regards
> 
> Troy