Hi Wrenches,
If I may, I'd like to forward this from a Wrench formerly on the list, now
semi-retired:
"I know this subject has been discussed, but I couldn't find the archive. I'd
like to know pros and cons of using the Outback FM 60 or FM 80 as a charger -
using a 7000 watt (6000 prime) gener
I would never contract for a guarantee minimum performance for a very simple reason - weather!
I think the only reasonable guarantee is to state the "nameplate" output of the array provided under test conditions, and make it clear that air temperature, clearness factor, dust, cloud cover, and ou
I would never contract for a guarantee minimum performance for a very simple reason - weather!
I think the only reasonable guarantee is to state the "nameplate" output of the array provided under test conditions, and make it clear that air temperature, clearness factor, dust, cloud cover, and ou
Good call Ray to incorporate out-of-spec grid in areas where that's an
issue (and probably a good idea to include just in case!).
If you need justification on future projects as to why you can't just
guarantee a flat #:
http://rredc.nrel.gov/solar/calculators/PVWATTS/version1/interp.html
"For
I think to make any energy production warranty fair, it would have to include
an on-site monitoring package that tracked cell temp, insolation, and grid
conditions. Then the installed system would be off the hook if the grid was out
of spec, insolation levels were low, cell temp too high, etc. T
Off-list reply:
Hi Greg,
Exeltech's AC Modules are warranted to -40C.
How many is "a bunch"?
Dan
--- On Mon, 4/26/10, Greg Egan wrote:
From: Greg Egan
Subject: [RE-wrenches] direct grid micro inverters?
To: re-wrenches@lists.re-wrenches.org
Date: Monday, April 26, 2010, 2:53 PM
Wrenches,
Greg, not sure about the direct grid inverters, but i do know that the Enphase
M190's are rated from -40˚C to +65˚C.Benn
DayStar Renewable Energy Inc. b...@daystarsolar.ca780-906-7807 HAVE A SUNNY DAY
CONFIDENTIALITY NOTICE:This email, including any attachments, contains
information from
Wrenches,
I was wondering if anyone has any experience with this company and/or
it's products. We have a client looking to put in a bunch of modules.
I don't believe the other micro inverter companies warrant their
inverters down to -40 so these guys have got my attention.
Thanks!
Greg
NA
Modules on pallet face down. Rain over weekend. Modules filled to the brim with
water. Consequences? (besides to the hide of the crew)
Holt E. Kelly
Holtek Fireplace & Solar Products
500 Jewell Dr.
Waco TX. 76712
254-751-9111
www.holteksolar.com___
List
If you think providing a PV energy output warranty is scary, imagine
trying to provide one for a small wind turbine!
Fortunately, the Small Wind Certification Council will be giving us
wrenches a big boost over the next few years as their turbine
certification program moves forward.
At least
Something you can do is guarantee a kWh amount given a certain amount of
irradiance. Offer X annual kWh given 2000 sun-hours, perhaps. If you're
in a snowy area, just make sure the irradiance meter keeps snow on it as
long as the modules would.
Of course you wouldn't just take 0.8 into PVWatts
We've had a lot of people asking about "performance" warranties and I stay very
far away from any language that hints at a performance guarantee. I think this
especially important in the "PPA" I give them all the product specifications,
run the production charts and then explain how little contr
Friends
Having had some experience in this genre, after selling my company to SunEdison
in '07, here are my takeaways.
1. The financing community want assurances. My hunch is their expectations or
what they were sold compared to what the production is, could be falling short.
2. Risk management
Check with PK Safety.com , we got Tower Full body Climbing Harnesses
with bags, front and rear attachment D rings, VERY COMFORTABLE and
move well.
We bought 3 and the price dropped to $290 each from $325 each. Ask for
a discount on Qty.
Thanks, Dana Orzel
Great Solar Works, Inc
E - d...
Our last two winters in SW Colorado have been off sun-wise. Two winters ago we
got gobs of snow [200%+ of normal] & this winter we had lots of Seattle type
grey overcast.
We hear from clients on extended generator run time [off grid] and reduced SHWE
output.
Living with it ourselves, I see t
Bill,
If, a big IF, I were to agree to a performance warranty, I would want to agree
to an annual production figure 90 or less percent of the estimated output along
with a bunch of caveats, like the one you suggest, to render any performance
warranty relatively toothless. Otherwise, I see i
Rebecca,
Petzl makes the Navaho Bod harness with ANSI/NFPA certification. It's my
understanding that this harness meets OSHA requirements. At some point I
read a blurb from Petzl about how OSHA approved gear is actually
self-certified by the manufacturer, which they disdain. Apparently there was
no
Anybody have any stories on this one yet? The great lightweight hope!
http://www.global-download.schneider-electric.com/852575A6007E5FD3/all/F18705A5004D9E298525770D002BA4CB/$File/h505258_0.pdf
182 watts AC per pound...
[[SB5000 @ 32 Wac/lb.]]
Hesitant to spec XTRX straight grid tie inverters, ha
Marco:
At what point (kW or cost) does a weather station with online monitoring
make sense?
What (or who ) defines "normal weather?"
Defining expectations for the large (> 1M) installations must be
particularly vexing - what constitutes normal or expected downtime due to
mechanical
failu
Consider adding a "Force Majeure" clause to your contract to cover "Acts of
God" and other aspects not under your control.
On the other hand, auto manufacturers evade this issue with "Your mileage may
vary."
Dan
--- On Mon, 4/26/10, Bill Loesch wrote:
From: Bill Loesch
Subject: Re: [RE-
Hi Marco,
I hope this query does not divert response to your original question.
How is the situation of the reduced performance due to the volcano (or other
"acts of God" or the like) approached in the Power Purchase contract? Perhaps
this could be titled "Reduced Solar Production As a Result
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