Ok here is the long form.
Customers system is in Mexico, Baja. So I'm not concerned about legal issues.
It is a custom racking design to fit his house.
Flat concrete roof,low tilt design with extra heavy duty engineering for
hurricanes. Easy access for future MX of all fasteners
Owner lives on
Have any wrenches had any experience with Heart Transverters
http://www.transverter.com/
I have a client who wants to use one to transition from a grid tied system to
an off the the grid system
Thanks
Larry Brown
Sun Mountain
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Al,
As long as you only have a max of two strings going into each of the
separate MPPT channels, no string fusing is needed. So with four strings,
two on each MPPT input channel in the inverter, no string fusing is needed.
This is one of the big advantages to having multiple MPPT channels in GT
William,
It appears that most (not all) of the damage you show on your website is due to
incidental contact of bare copper with the aluminum. Also, dripping from bare
copper to aluminum is a problem particularly in a marine environment. Lastly,
the Coast Guard has been using unframed modules
The rack company general specialties recommends a SS washer between aluminum to
aluminum, as in rack rails m
Sent from my iPhone
> On Jan 27, 2016, at 10:10 AM, William Miller wrote:
>
> Jay:
>
> Conrad has a very pertinent point to make below. We are discovering that
> neither aluminum ra
Jay:
Conrad has a very pertinent point to make below. We are discovering that
neither aluminum racking nor module frames hold up well in a marine
environment. If you navigate to Miller Solar/case studies you will see photos
and commentary about a particularly serious case of aluminum degradatio
Regarding the primo we just installed 5 at a location and used the midnite
with the switch, (mnpv6 disco) its the only way on this inverter to perform
any testing. With all the issues it helped out a great deal.
Jerry
On Jan 27, 2016 4:09 AM, "Allen Frishman" wrote:
> Wrenchers,
> What is the req
One thing I have noticed is that many rack materials are a mixture of aluminum
and other metals. I found out when trying to weld the material. It would be
good to know just how dissimilar stainless is compared to the rack metal.
Jay, I would ask them what good is the insulator if the bolt/screw
Jay,
There is the consideration of voiding any engineering that is being relied
on for your protection. If there is a failure telling the judge that you
followed the homeowners instructions is not going to get you off the hook.
Kurt
Kurt Johnsen Energy Systems
On Wed, Jan 27, 2016 at 9:43 AM, Pe
Hi Al,
My understanding of dual mppt inverters is that they are treated nearly as two
inverters on the DC side. The requirement for fusing on multi string arrays has
to do with the reverse flow of current in the event of a fault on one of the
strings. 2 strings are safe, 3 or more and you can
Jay
Please keep in mind that those plastic / synthetic washers have a high
probability of deteriorating over the next several years creating a new set of
issues.
Peter
American Solar
- Original Message -
From: Conrad Geyser
To: RE-wrenches
Sent: Wednesday, January 27, 20
Jay,
I would suggest that he has a point, that the dissimilar metals do have a
reaction. But that the reaction is self limiting and that stainless
fasteners with aluminum are used in marine applications albeit only with
anodized aluminum. Or say fine and invoice accordingly for the plastic
washe
Another engineer, eh?
I'd say no... Tell him to find another installer. 50 million Elvis fans, I
mean PV installations, can't be wrong.
Ask him if he brings his own scissors to the hairdresser? That's my
favorite line.
Jason Szumlanski
On Wed, Jan 27, 2016 at 12:37 AM, Jay wrote:
> Hi all
>
Wrenchers,
What is the requirement for fusing 2 strings per MPPT? Specifically for an
inverter like the Fronius Primo that has no integrated fuses.If you run 2
strings to each MPPT do you need to fuse each string?In this case there is
a total of 4 strings which would need to be fused
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