Hi All, I think the answer is OMG NO! But yes is so alluring I have to ask...
I'd like to have additional Amp/hrs on my house bank which is currently comprised of 3 to 4 year old Trojan T105
s to provide just over 400AH at 12V.
I've got 2 big (double sized to normal) 8D batteries, also 3 to 4 years old
- one to start each Ford Lehman diesel
. The engines start instantly every time. I think they are Exide, but don't know if 8D are start or deep cycle.
Can I move one
of the engine
batteries to the house bank without much 'real world' issues for battery
life? These batteries are all older as stated, appear to work well, have been properly maintained, etc. Adding 2 'new' batteries to the house bank isn't practical unless I repurpose/eliminate an 8D start battery
anyway, to use its physical location. BTW, these are all lead acid.
I could do the re-purpose right now just by how I set my existing battery selector switches, so its easy peazy.
Usage if you care: we cruise
for 6 months spring to fall, 80% at anchor
. Engine alternator charging
& generator charging
via Heart inverter/charger with 3 stage profile, though at anchor
I seldom take it all the way to absorption as those last electrons are the hardest. I try hard to use the current
batteries only to 50%, but there are days... At a marina every week to 10 days and the charger
takes them to float for a day or two.