Hi All,
After many years of installing on steep roofs (most New England
roofs are 10/12 or 12/12 pitch) with various approaches including
harnesses, pulleys, lifts, Lulls, staging, etc., we finally realized
that it is so much easier on residential installs to just erect
scaffolding for all
Hi Peter,
I don't have history with the PV Powered's but
they have a 30 KW I've heard good things about.
A couple of Solectria 15 KWs would make a nice
balance between "single inverter" and redundancy
and ease of install.
2 or 3 Fronius IGPlus 12 KWs would also be a good
solution. Power
On Behalf Of Jeff
Clearwater, Village Power Design
Sent: Wednesday, July 08, 2009 3:35 PM
To: RE-wrenches
Subject: [RE-wrenches] Efficiency Curves of Fronius Inverters?
Hey Folks,
Anyone have or know where I can get my hands on the efficiency vs.
wattage curve for the Fronius IG series (the old serie
Hey Folks,
Anyone have or know where I can get my hands on the efficiency vs.
wattage curve for the Fronius IG series (the old series - not the
Plus).
I have a 4000 in stock and wondering if I can apply it to a friend's
2660 watt system without losing much to efficiency at low power
levels.
Hi All,
I've been into Macs since '84 - we have 6 in the office - my 17"
MacBook Pro is the second brain to my business.
Ease of use - rock solid OS - rock solid hardware - elegant
interface - VMWare Fusion makes it both a Mac and fast full fledged
PC - best of both worlds. .mac can provid
Hi William and All,
Thanks to all for the offers and clarifications. I may have located
a cable locally and if not will probably make one up per William's
and Phil's instructions.
And as William and others have said - do not use anything as an SWI
cable unless you know it's an original SWI
Hi All,
I need to track down a '98 vintage Trace SW stacking cable. Anyone
have or know where I might find one?
Thanks,
Jeff C.
--
~
Jeff Clearwater
Senior Design Engineer
NABCEP (tm) Certified Solar PV Installer
http://www.nabcep.org/
Village Power Design/NorthEast Solar Design
Hi Folks,
Please note that Michael asked us to give our vote offlist to him
directly. I will vote there.
Thanks!
Jeff C.
Thanks Michael for bringing this up.
I vote YES. Allow the ED of NABCEP being allowed on the list, until and
unless NABCEP gets a dedicated Wrench-head employee that c
ng!
Jeff Clearwater
Village Power Design
Unirac uses T bolts and is easily assembled.
Jason Lombard
CSBA
Open Hand Solar
505 795 8646
On Jan 21, 2009, at 7:14 PM, Carl Adams
<<mailto:swingjun...@gmail.com>swingjun...@gmail.com> wrote:
Jason,
I agree the DP&W racking is very stu
ands worldwide.
Easy to install - just need a card - make up a cable and plug into
an ethernet line or dedicated modem.
Hope that helps - hope you are staying warm up there!
Best,
Jeff Clearwater
Village Power Design
Wrenches,
I am looking into using the Sunny Web Box and Sunny Portal o
Nicely done Bill and Matt P !
Hopefully that'll set a good precedent for future discussions and
guidelines on this!
Jeff
William and all,
I notified a friend of mine in the fire service about this, and he has
followed up with the website to have the article removed. Here is the thread
wi
Hi All,
Their website video and literature claims they don't need any
tie-downs or ballast. That I'd like to believe! Hard to imagine
that'll fly. (or more like I can imagine them flying off the roof!)
Jeff
They are new and cylindrical.
Bill.
-Original Message-
From: re-wrenche
Hi Bill and all,
I've been searching for an alternative to plastic wire ties for some
time as I'm not sure they are going to hold up over the system life
of 20-30+ years and it'll be an ugly site to have all those wires
drop onto the roof.
But for a flush rooftop array, an assumption to repl
Hi Folks,
We burnt up a gen set's voltage regulator on an off-grid system sunny
island/sunny boy system when we took the sunny island's off-line but
didn't shut off the sunny boy. So the SB backfed the genny and fried
the very expensive voltage regulator on a 30 KW system. SMA had us
instal
Hey Darryl,
I agree with Jason. We've done some commercial S5 systems and we
pre-tighten with a cordless driver and then two guys follow with a
couple of manual torque wrenches - it takes but a few seconds to
turn the final 1/2 turn to the right torque - felt and confirmed by
human feel and
Hey Folks,
When I installed SS heat exchangers in wood stoves a while back, I
always made sure to have 2 PT valves in the system for redundancy in
case one stuck or underperformed. Steam explosions are simply no fun.
We'd locate one right on the woodstove outlet and another at the
first ben
Hi Carl,
Depends on what kind of microhydro output you are talking.
We have installed two systems now with a HiPower 3-phase inductive
Alt output voltage clamped and rectified straight into a SMA standard
SunnyBoy (with blessings from SMA). As long as you don't go over 600
VDC the warranty a
d protocol you
could follow for your system.
Ryan
-Original Message-
From: [EMAIL PROTECTED]
[mailto:[EMAIL PROTECTED] On Behalf Of Jeff
Clearwater, Village Power Design
Sent: Thursday, August 07, 2008 10:14 AM
To: RE-wrenches
Subject: [RE-wrenches] Imbalanced Legs in 3-Phase systems
Hi Wre
t I'm
not that sure of the loads as it's new construction and hasn't been
characterized.
What are the appropriate calcs to do here?
Thanks!
Jeff C.
--
~~~~~
Jeff Clearwater
Village Power Design
Sustainable Energy & Water Solutions for Home & Village
http:/
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