What size of diode do I need to connect my solar panels up to two sealed 12V batteries connected in series?

I'm not worried about over charge for they will have constant drain on them.

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I'm not being dumb, honest, but I don't see your connections there making sense ! Please post what you have - any idea of the open circuit volts of one cell ? I'm worried you'll get circulating currents in your panels which are A Bad Thing.
SYMMETRY (author)  steveastrouk8 years ago
This is what I have
http://cgi.ebay.com/ws/eBayISAPI.dll?ViewItem&item=110412434358#ht_3725wt_1165
also two 12V Lead Batt
Thats why I figured I would ask before I started soldering anything together :)
I'm really confused here ! Post me a sketch of your wiring !
SYMMETRY (author)  steveastrouk8 years ago
If not this might help
Untitled.jpg
What's the maximum current the panels can supply ?
SYMMETRY (author)  steveastrouk8 years ago
I'm guessing sense I'm using 28 .5V at something like 3.5A each connected in a series of six with 4 of them set up as 5 Parallel and 2 set up as 3 Parallel and please correct me if I'm wrong and I'm not sure if I can even do this but. 3V 70A?
Sorry, don't follow that. 3.5A ? Where is your 70 A from ?
SYMMETRY (author)  steveastrouk8 years ago
I'm sorry I'm new at this but the cells say 3.6 a's so I think the highest would be would be 18 a's right? I totally did that last one wrong with adding across the series