Several years ago I measured 1250-1280 consistently over 2 weeks between
16,000' - 18,000' in Tibet with my Daystar. Readings remain normal to this day
still, it's a great little meter. My research before I left on the trip
revealed that if one allows for a 1% gain in current per 1000' ASL you
W/m2. There
could be a slight calibration problem. The 1800 W/m2 must be the edge-of-could
effect, or something is definitely going on with your pyranometer.
Jeffrey Quackenbush
From: R Ray Walters
To: RE-wrenches
Sent: Wednesday, August 29, 2012 1:26 PM
Subject
Ray,
Regarding the PV power from Photowatt, did you put a load on the
output/batttery to drop voltage to or below battery resting voltage? Doing so
will force the controller to output the maximum power available. If you don't,
then battery acceptance dictates the power being generated. Also, di
Could the battery SOC be the reason you see the module current at 60% STC
rating?
Dick Ratico
--- You wrote:
I've seen 1300 sustained at 6000 feet and 1800 edge of cloud too.
Brian
Typos courtesy of my iPhone.
On Aug 29, 2012, at 1:56 PM, Nathan Jones wrote:
>
>
> Ray,
> I lived at alt
I've seen 1300 sustained at 6000 feet and 1800 edge of cloud too.
Brian
Typos courtesy of my iPhone.
On Aug 29, 2012, at 1:56 PM, Nathan Jones wrote:
>
>
> Ray,
> I lived at altitude for many years but before being in this business. Never
> had a meter up there of course but I was always
Ray,
I lived at altitude for many years but before being in this business. Never had
a meter up there of course but I was always aware of the heightened power from
the sun. Two miles less atmosphere to diffuse the power of the light. My gut
and your realistic readings in low light say the mete
Hi All;
I was recently at a mountain top solar site (11,000 ft), doing some testing,
and I measured insolation values that were averaging 1400w/m2, with a temporary
peak (edge of cloud effect) that hit 1800w/m2.
Do I need to my meter recalibrated? Its the Daystar, and seems to be accurate,
wh
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