> "tiamiboat" <[EMAIL PROTECTED]> wrote in
> message news:[EMAIL PROTECTED]
> >
> snip
>
> I believe the new regulator we bought for our solar panel does this
> too. Don't know if it does this whilst the panel is charging the
> batteries. So far the panel is working well but we're not so sure
> about how well the batteries are holding the charge. On Sunday
> evening when we connected the panel the regulator suggested that our
> batteries (3 dom, 1 starter) were around 60% charged. This morning
> they were saying 80% ish although we have had flickers of being
> higher than this. The panels produce 225 w/d. Testing has shown
> anything from 1 - nearly 4 amps being produced depending on the
> strength and height of the sun. We are considering some
> battery "vitamins" to improve the life and charge holding of the
> batteries as this is cheaper than buying new ones. What do you think?
> Debbi
> nb TIAMI
>
> I would try giving what you have got a full charge first and then
> check the SGs of each cell, if your only putting an average of 3 amps
> per hour for 12 hours a day in, 36 Ah and then minus how much you use
> each day I would be very surprised if your Solar cells will ever
> charge your batteries fully before next winter.
Read my earlier post - 225Wh/d = 17Ah per day, not 36!
As regard battery "vitamins" - they usually are a (very) short term solution
and can cause sudden battery failure after a few months...
Best to get the batteries *fully* charged first - the longer they are a low
state of charge then the shorter the life.
Ron Jones
Process Safety & Development Specialist
Don't repeat history, see unreported near misses in chemical lab/plant
at http://www.crhf.org.uk
Only two things are certain: The universe and human stupidity; and I'm
not certain about the universe. ~ Albert Einstein
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