Inverter Power Ratings [RE-wrenches]

[William Miller]

Friends:

I've toyed with this idea:  For the hours before and after solar noon, the
grid tie inverter fed by fixed arrays is operating at reduced input  due to
off-angle irriadiance.  What if one where to feed an inverter with, say,
20% more PV input than the inverter is rated for?

!. The inverter self regulates during the hour before and after solar noon.

2. During non-peak hours, overcast or low seasonal sun angle times, the
inverter runs at a higher output.

You've answered the question in that the inverter life span will be
reduced.  Depending on how severe this reduction is, however, this still
may be a worthwhile scenario for some users, i.e. replace the inverter in 5
to 10 years but enjoy higher off peak output for all of those years.

Comments???

William Miller




At 01:35 PM 4/29/02 -0700, you wrote:
>Hi Don and all.
>
>Been gone and just returned to this thread.
>
>I agree with Don and kent.  Makes no sense to push the inverter, any
>inverter. I mean I wouldn't recommend someone to run a SW4024 at 4kw for
>all day.
>
>Peace,
>jay
>
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