[RE-wrenches] Expected Life of DR2424

[Mick Abraham]

Hi, In a battery based system, an under-performing PV array is more of a
stressor on the battery than on the inverter. An indirect effect may be that
the battery slumps along at a lower voltage, then when the inverter is
called upon to deliver power it must hog more DC amps--at that lower
voltage. Ohm's law would suggest that to create more heat--and heat is an
enemy of all power electronics.

If the same wattage were drawn from a battery at a higher voltage, that
would be lower amps and lower I2R (I squared R) losses/ lower heat
generation.

Jolliness,

Mick Abraham, Proprietor
www.abrahamsolar.com

Voice: 970-731-4675


On Wed, Nov 3, 2010 at 2:29 AM, benn kilburn <benn at daystarsolar.ca> wrote:

>  Everyone, Thanks for the feedback.
> Allan kinda nailed it with his first comment about the catch-22.  A few
> stand-out factors aside, i guess it could fail tomorrow or in 30 years.
>
> The DR2424 is installed in a clean, dry, open area, although I never
> thought to ask if it was used in the construction of the round straw bale home.
>  It is possible.
>
> Can a poorly wired PV array (loose connections) have an effect on the
> inverter?  This will be fixed when we move the array to a pole mount.
>
> benn
> DayStar Renewable Energy Inc.
> benn at daystarsolar.ca
> 780-906-7807
> HAVE A SUNNY DAY
>
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