maximum charge rate for SLA batteries?

Posted by James Johnson on September 02, 2008, 03:41:07 PM

maximum charge rate for SLA batteries?
Is there a maximum charge rate for SLA's?
 

Posted by James Cormican on September 03, 2008, 11:55:48 AM

Re: maximum charge rate for SLA batteries? (Reply #1)
charge rate?

such as c5, c10, c20?

most batteries prefer c10 or higher for charging and discharging especially.  almost all of them are rated at c20.

be careful with max vdc on VRLA batteries, most dont want above 14.1 vdc, assuming 12v batteries.

james
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Posted by James Johnson on September 03, 2008, 03:47:54 PM

Re: maximum charge rate for SLA batteries? (Reply #2)
Thanks James,

The reason I ask is that I'm designing my system around daytime use only..so the battery is being used as a "buffer" only. IE: if my 12v DC loads exceed the current amp output of my array, then the extra needed amps are pulled from the battery. With that being said, as I increase my array to power more of my studio, I'm concerned that when the battery gets a little drained from supplying a couple of amps for an hour or two, it will suddenly get charged with the full 12amps from my charge controller. The 12v battery I have is only 32Ah, so it would be getting charged at like c/2.5 which might be too much?

maybe there is a better way to distribute DC power directly form an array, without the use of a battery? Not sure how one would go about this, and keep the voltage regulated to a constant 12v output....

Any ideas?

James
 
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