[RE-wrenches] Tri-Star MPPT

[jay peltz]

Hi Eric,

While agree with most all your assessments, 
Can you please elaborate on the "sulfation causes the voltage not to climb?"

This is quite counter to what I have seen and what the battery people say?

Thanks

Jay

Peltz power

Sent from my iPad

On Jul 23, 2013, at 2:48 PM, Eric.Bentsen at schneider-electric.com wrote:

> 
> Hi William, 
> 
>  If the SG was 1.26, of course the battery voltage would increase 
> quickly to >30V (which is high for warm weather, BTW). 
>  It has been my experience that sulfation causes the voltage NOT to climb. Especially when you have a very large bank, and a 
>  relatively small amount of solar. 
>  Sometimes it is necessary to reduce the bank size into smaller sets to equalize them and recover their performance. 
> This method of reducing bank size is also effective to compare performance and weed out a potentially bad battery. 
>  Systems that have a lot of capacity, with a relatively small amount of charge current usually creates problems, because 
>  the load demand exceeds solar production. 
>  This results in batteries that operate with partial SOC, which is when sulfation is most prevalent. With (8) L16s, you have approx 
>  800Ahrs of capacity (24V bank). It would take significantly more than 8A of charge current to properly care for a bank that size. 
> 
> Rgds,
> _____________________________________________________________________________________ 
> 
> Eric Bentsen  |   Schneider Electric   |  Solar Business  |   UNITED STATES  |   Technical Support Representative 
> Phone: +(650) 351-8237 ext. 001#  |   
> Email: eric.bentsen at schneider-electric.com  |   Site: www.schneider-electric.com/solar  |   Address: 250 South Vasco Rd., Livermore, CA 94551 
> 
> 
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