On 1/20/2013 7:10 PM, tom wrote:

I buy used deep cycles at the 4 to 8 year point. But I buy really good
ones. The 200AH I currently have in my van (180 watts of panels with an
MPP charging system) are currently at 12.8 volts and haven't seen a
charge for 3 months. That is as good as it gets. One is 9 years old
and the other is 5.

They are 2 AGM UPS batteries. One is a 67AH that costs about $300 new,
and the other is 134AH that costs about $550 new. I got the 67 for free
from a damaged shipment - bent terminals due to poor shipper handling,
the receiver rejected the whole pallet, we got 12 of them for free. I
paid $100 for the 4 year old one. They are from the same manufacturer
and the same series.

You get what you pay for. Just make sure the guy that pays for it is a
business and that they regularly rotate out old batteries from their UPS's.

tom
K0TAR


Here are links to those 2 batteries. The *-270 link is the closest
current battery to my 67AH. The *-475 is current.

http://www.unitedpb.com/documents/cd...s%2012-270.pdf
http://www.unitedpb.com/documents/cd...s%2012-475.pdf

tom
K0TAR