John - Im pretty sure this will be my last season for the GP24 interstate 12VDC batteries. I was pulling 20AMPs draw for 3 houres each night from three of these last season along with 1 amp for around 9 hours and ending up at the 12.0VDC reading the next morning with all three batteries connected in parallel. Have been re-charging them back up in 3-5 hours using smart mode charging technology and being able to draw about the same amount of current each nigh night. I lost one of my three interstate last year so this season I am down to two haha...
I think its time to get some new something... I believe I have gotten my moneys worth out of my four original 85AH interstate batteries since 2008. One of those interstate batteries was installed in 2005 but I didnt start using it until 2008. It was the first to go but after I got smart mode charging technology in 2009 the other three has been doing great.
Thanks for the info