[RE-wrenches] Shell Solar RV20 PV charge controller

[R Ray Walters]

This is basically a good old on/ off controller constant current  
controller like the venerable c30, only it is NOT adjustable. It is  
not a constant voltage controller, PWM, etc. It IS very reliable.
 From the manual: Charge termination volts is 14.2 volts, charge  
resumption voltage is at 12.8.
I can mail you the manual if you need, I have an extra copy. Hardly  
any useful info, other than what I've related, IMHO.
I've used these with sealed batteries, but I use B&B brand, and this  
voltage is within their recommended charge voltage range. Other sealed  
batteries might need lower voltage set points.
Also, it depends if it is being used in float service, or actual cycle  
service. B&B recommends a lower voltage(13.7) for constant float  
service.
Third, sealed batteries are very finicky about maximum charge current,  
too. Lower array current might work with this controller, and a higher  
amp array might be too much, and you should go to something more  
sophisticated.

R. Walters
ray at solarray.com
Solar Engineer




On Oct 13, 2009, at 1:59 PM, Randy Brooks wrote:

> Fellow Wrenches,
>
> Does anyone have a manual for an old Shell Solar RV20 PV charge  
> controller?  Or know where I can get a copy.  I searched the web  
> without success.  I'd like to know if the charge settings are  
> adjustable for sealed batteries.
>
> Thanks,
>
> Randy Brooks
> Brooks Solar, Inc.
> Solar Power for People
> 140 Columbia View
> Chelan, WA  98816
> 509-682-9646
> Randy at BrooksSolar.com
> www.BrooksSolar.com
>
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