[RE-wrenches] Charging AGM Batteries

[Darryl Thayer]

I agree absolutly. But Outback and Apollo are the only systems that monitor and control on SOC.  Apollo can operate a relay, and Outback can change settings using the FMDC.  I think both systems with a few tweeks are the better way to handel AGM.
DARRYL 

--- On Sat, 9/19/09, Hugh <hugh at scoraigwind.co.uk> wrote:

> From: Hugh <hugh at scoraigwind.co.uk>
> Subject: Re: [RE-wrenches] Charging AGM Batteries
> To: "RE-wrenches" <re-wrenches at lists.re-wrenches.org>
> Date: Saturday, September 19, 2009, 4:21 AM
> It seems to me that you really need
> to have a controller that monitors the state of charge in
> order to do a good job of recharging sealed batteries. 
> If they are low then you can push the voltage up but if they
> are in an intermediate indeterminate state as with most
> small renewable energy systems then you don't know what to
> do. Playing safe can mean that the battery does not get a
> proper charge (I am told).
> 
> > The chargers typically found in our industry deliver
> the same "bulk" charge amperage from initiation of the
> recharge all the way to when the absorption voltage is
> reached. So...if you set that for a high value the same high
> rate would be present not only when the battery is highly
> depleted but also when the battery is approaching 80% state
> of charge. That seems scary to me.
> 
> 
> -- Hugh Piggott
> 
> Scoraig Wind Electric
> Scotland
> http://www.scoraigwind.co.uk
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