Cranking and deep cycle batteries

5 Posts
Sep 24, 2006 12:23 pm
Cranking and deep cycle batteries

Hi,

I recently connected my PV array to my house. I am using 4 8D batteries but they are the cranking type. What I want to know is how much will 4 8D deep cycle batteries last in comparison  to the cranking ones under the same load conditions. Can I connect deep cycles batteries to that cranking ones?

Thanks,
Jorge
 
27 Posts
Sep 24, 2006 12:48 pm
Re: Cranking and deep cycle batteries

Hello Jorge,
  As you already know, motor batteries (cold cranking batteries) will work for backup power but not as well as deep cycle batteries.  I cannot tell you the percentage that deep cycle will last as compared to the cold cranking, but it would be in your best interest to invest in a deep cycling battery for having predictable energy storage.  What you could do is get a battery bank monitor such as the Bogart Trimetric to see the results yourself.   
  As for connecting dissimilar batteries, you should not do this as the brand new batteries will work at the lowest common denominator, and in essence become just like the old batteries. Your best bet is to buy a whole new battery bank. I put a link below for you to view some options on batteries as well as the battery bank monitor.---Ben

8D battery - http://store.altenergystore.com/Batteries/Batteries-Sealed-Agm/8A8D-Agm-245-Amp-Hour-20Hr-Sealed-Batt/p771/

Battery Bank Monitor - http://store.altenergystore.com/Meters-Communications/Meters-Battery-Monitors/Ammeters-Voltmeters-Battery-Monitors/Tm-2020-Trimetric-Meter-Battery-Monitor/p254/

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