Down-sizing battery systems [RE-wrenches]

[Jay Peltz, Peltz Power]

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Hi Doug,

You mention that 98% of systems are now  grid-tied.

Can you say what the percentage of these are batteryless?

thanks,

jay

peltz power


On Jan 27, 2008, at 4:53 PM, Doug Pratt wrote:

> ${top_text_ad}
> No doubt about it, battery packs are getting smaller. Mostly  
> because 98% of systems are grid-tied now, and for those few that  
> elect to go with battery backup, 4 to 8 hours of runtime is fine.  
> For the off-grid systems, as Jeff has noted, electrical loads have  
> increased, plus, battery costs have skyrocketed, and where I used  
> to always aim for 4-5 days of storage (@ 60% DOD), costs are often  
> forcing me down to 2.5-3 days. I warn dealers that this is going to  
> impact battery life expectancy, but it's a tough sell for dealers  
> who do a battery-based system once every year or two, and really  
> don't understand batteries at all. Hey, but on the other hand,  
> generators are getting better, and cheaper, so maybe this isn't  
> such a bad thing.
>
> Cheers,
> Doug Pratt
> DC Power Systems
>
>


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