MX60 at cold weather VOC [RE-wrenches]

Bob Ellison ellison at gisco.net
Mon Aug 23 12:55:27 PDT 2004


 

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Kirk,
I just went through this on planning 3 different jobs under the same
circumstances, wanting to series 3 panels in my case the voltage went to 127
but after the calculation it came up to around 155 volts. With the long wire
runs there was a sizeable wire difference.
The short answer came from Outback, that I should move to hawaii and hook up
3 in series there, not here. I think that the protection circuit is best
used as just that. Don't use it as a safety valve, just in case.

Bob

RE. Ellison
Supplier of;
Alternative Energy Systems & Supplies
34642 Countryman Road
Theresa, NY. USA
                               13691-2076


-----Original Message-----
From: Kirk Herander [mailto:kirk at vtsolar.com]
Sent: Monday, August 23, 2004 11:24 AM
To: RE-wrenches at topica.com
Subject: MX60 at cold weather VOC [RE-wrenches]




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Outback Chris & group,

I'd like to use the SANYO 190 watt modules in a particular installation.
They are rated at 67.5 VOC (54.8 vmppt). The MX60 will accept up to 140
VOC, so I could wire up pairs in series and obtain 135 VOC. But in these
parts we have to design for -20 degree or greater winter mornings. That
means an up to 25% increase in VOC, or 169 VOC. Chris, is this too high
for the MX60 to handle on the occasional (or sustained) cold winter day?

Kirk Herander
Vermont Solar Engineering
802.863.1202
fax 802.863-7908
NABCEP(tm) Certified Solar PV Installer
Xantrex Certified Dealer Charter Member
NYSERDA-eligible installer
VT Solar and Wind Partner


-----Original Message-----
From: Bob Ellison [mailto:ellison at gisco.net]
Sent: Sunday, August 22, 2004 6:49 PM
To: RE-wrenches at topica.com
Subject: RE: Satellite Internet query [RE-wrenches]



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Allan,
I have friends with both. Directway is no problem, Starband seems to be
a
problem.
Every message my friend with Starband sends me gets picked up by my
ISP's
virus trap.
They (Starband) have been of no help. If he takes the same computer and
sends me a message from another location it comes in fine. There is
nothing
on his computer.
This has got me ready to go to Directway, I wouldn't go with Starband
after
this experience.
The cost still scares me.....

Bob

RE. Ellison
Supplier of;
Alternative Energy Systems & Supplies
34642 Countryman Road
Theresa, NY. USA
                               13691-2076


-----Original Message-----
From: Allan Sindelar [mailto:allan at positiveenergysolar.com]
Sent: Saturday, August 21, 2004 3:45 PM
To: New wrenches posting
Subject: Satellite Internet query [RE-wrenches]




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Wrenches,
I would appreciate suggestions, experiences, preferences, etc. comparing
Starband and Direcway satellite internet providers and hardware, as we
prepare to purchase a system for our offgrid home. Thanks in advance.
Allan at Positive Energy

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