Inverter Power Ratings [RE-wrenches]
William Miller
wrmiller at slonet.org
Mon Apr 29 22:20:11 PDT 2002
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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