Partnership to bring new solar tracker to area

Sep 6, 2012 Full story: Manchester Journal 32

A new partnership will bring the innovative Vermont-made AllSun Tracker solar electric system to homeowners and businesses throughout southwestern and central Vermont communities.

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Since: Feb 11

McHenry, MD

#1 Sep 8, 2012
Solar power which SHUTS DOWN during a power outage,
and will not generate power when the power is out... That's a plus factor... Duhhhh....

Installed on a minimum 50' diameter area which doesn't receive any shade during the day....
Guess you're gonna have to ask your neighbor to
cut down his trees....

The inverters, mounting system only have a ten year warranty.... And how many thousands does it cost to replace these simple item items????

Now reach into to that coffee can buried in the back yard and pull out $32,000....

What a bargain.....

“Get off my lawn!”

Since: Jun 11

People's Republic of VT

#3 Sep 8, 2012
Alexs Tavern LLC wrote:
Solar power which SHUTS DOWN during a power outage,
and will not generate power when the power is out... That's a plus factor... Duhhhh....
Installed on a minimum 50' diameter area which doesn't receive any shade during the day....
Guess you're gonna have to ask your neighbor to
cut down his trees....
The inverters, mounting system only have a ten year warranty.... And how many thousands does it cost to replace these simple item items????
Now reach into to that coffee can buried in the back yard and pull out $32,000....
What a bargain.....
I await the erudite analysis from the three toothed hillbilly contingent. It should be comical.
Community Disorganizer

Trumbull, CT

#5 Sep 8, 2012
Obama should give everybody in the USA an installed solar tracker; so what if it would cost about 3 trillion, the economic genius can order the US Treasury to start printing it.

http://www.bing.com/images/search...
cane

Macon, GA

#6 Sep 8, 2012
Alexs Tavern LLC wrote:
Solar power which SHUTS DOWN during a power outage,
and will not generate power when the power is out... That's a plus factor... Duhhhh....
Installed on a minimum 50' diameter area which doesn't receive any shade during the day....
Guess you're gonna have to ask your neighbor to
cut down his trees....
The inverters, mounting system only have a ten year warranty.... And how many thousands does it cost to replace these simple item items????
Now reach into to that coffee can buried in the back yard and pull out $32,000....
What a bargain.....
The inverter shuts down as a safety factor for electrical workers and linemen. The power lines would be energized continually if it did not .

“Get off my lawn!”

Since: Jun 11

People's Republic of VT

#7 Sep 8, 2012
cane wrote:
<quoted text>The inverter shuts down as a safety factor for electrical workers and linemen. The power lines would be energized continually if it did not .
Yeppers.

Comical.

Since: Feb 11

McHenry, MD

#9 Sep 8, 2012
cane wrote:
<quoted text>The inverter shuts down as a safety factor for electrical workers and linemen. The power lines would be energized continually if it did not .
This is 2012 and there are units which come with a second inverter
which automatically takes your system off grid during a power outage and transfers it to a DC subpanel or by using your existing panels.... DC then converted to AC....

For a system that starts at $32,000 this should be built into the system as a safety feature.... Until these companies stop promoting the ON GRID concept, I don't see a large market in residential usage....

cane

Macon, GA

#10 Sep 8, 2012
Many don't want the expense of buying and maintaining a battery bank. Residential use is the best for grid tie because it reduces the utility bill thus saving money. Most battery systems are used by stand alone PV systems who are off grid. Battery backup for many is not cost effective.

Since: Feb 11

McHenry, MD

#11 Sep 9, 2012
cane wrote:
Many don't want the expense of buying and maintaining a battery bank. Residential use is the best for grid tie because it reduces the utility bill thus saving money. Most battery systems are used by stand alone PV systems who are off grid. Battery backup for many is not cost effective.
You're running off on a tangent to include ALL solar units...
I'm referring to the cost effectiveness of this solar tracker unit
which starts at $32,000 plus installation cost for residential use...

They list the panels as having a 25 year warranty but only give
the inverters and mounting system a ten year warranty, items which
which could prove very costly in a harsh climate like Vermont....
The grid tie inverter alone could cost in the range of $5000 to replace....

There is also the fact that this unit requires you have 360 degree clearance at a minimum of 50' for proper operation.... Unless you live in the country, you're screwed with this unit....

So if you have $32,000 plus to put this system into operation, I'm sure this particular buyer has the additional $10,000 to add the backup unit as well..... To NOT install a backup at this cost would be no different than buying a Corvette and parking it in the driveway to stare at because you can't afford to put gas in it.....
LSU

Mechanicville, NY

#12 Sep 9, 2012
Let it go Alex, it's game time! Bets are in and I will soon be collecting tons of cash!
Elmer

United States

#14 Sep 9, 2012
LSU wrote:
Let it go Alex, it's game time! Bets are in and I will soon be collecting tons of cash!
I'm rooting for Alex's ironmen to beat the old guy in Denver.

Alex, you still owe me a dinner from the stupor bowl 2 years ago.
cane

Perryville, MO

#16 Sep 9, 2012
Alexs Tavern LLC wrote:
<quoted text>
You're running off on a tangent to include ALL solar units...
I'm referring to the cost effectiveness of this solar tracker unit
which starts at $32,000 plus installation cost for residential use...
They list the panels as having a 25 year warranty but only give
the inverters and mounting system a ten year warranty, items which
which could prove very costly in a harsh climate like Vermont....
The grid tie inverter alone could cost in the range of $5000 to replace....
There is also the fact that this unit requires you have 360 degree clearance at a minimum of 50' for proper operation.... Unless you live in the country, you're screwed with this unit....
So if you have $32,000 plus to put this system into operation, I'm sure this particular buyer has the additional $10,000 to add the backup unit as well..... To NOT install a backup at this cost would be no different than buying a Corvette and parking it in the driveway to stare at because you can't afford to put gas in it.....
The inverter you speak of is relatively weather proof. As for the warranty, this type inverter uses capacitors (electrolytic) and over time can lead to failure. There are inverters on the market which use none and are warranted much longer. The on board panel mount inverters are much less expensive to replace and are virtually impervious to weather and have most of the features of the single head end inverter.
LSU

Mechanicville, NY

#17 Sep 9, 2012
Elmer wrote:
<quoted text>
I'm rooting for Alex's ironmen to beat the old guy in Denver.
Alex, you still owe me a dinner from the stupor bowl 2 years ago.
What, he still hasn't paid up! He owes me for my best girl a year ago......
Elmer

United States

#18 Sep 9, 2012
LSU wrote:
<quoted text>What, he still hasn't paid up! He owes me for my best girl a year ago......
He offered, but the restaurant that I wanted to go to closed!

Since: Feb 11

McHenry, MD

#20 Sep 13, 2012
Elmer wrote:
<quoted text>
He offered, but the restaurant that I wanted to go to closed!
Hea Hea Hea!!!!!
I offered a limo to Jimmy's for hot dogs and chilli and you never responded.....

“Get off my lawn!”

Since: Jun 11

People's Republic of VT

#22 Sep 14, 2012
Alexs Tavern LLC wrote:
<quoted text>
Hea Hea Hea!!!!!
I offered a limo to Jimmy's for hot dogs and chilli and you never responded.....
ummm... you offered to buy the food but not the limo.

I also insist on Charone attending the "happy meal".

Since: Feb 11

McHenry, MD

#23 Sep 14, 2012
Elmer_J_Fudd wrote:
<quoted text>
ummm... you offered to buy the food but not the limo.
I also insist on Charone attending the "happy meal".
With her wine taste being close to yours, that would be a
$500 hotdog dinner....
Ace

Cassatt, SC

#24 Sep 15, 2012
cane wrote:
<quoted text>The inverter you speak of is relatively weather proof. As for the warranty, this type inverter uses capacitors (electrolytic) and over time can lead to failure. There are inverters on the market which use none and are warranted much longer. The on board panel mount inverters are much less expensive to replace and are virtually impervious to weather and have most of the features of the single head end inverter.
Yes...the new micro inverters can replace the central inverter at much lower cost and avoid failures on a large scale. No need to have a backup inverter on hand. Micro inverters do a very good job and maximize power output while minimizing the effects of shading and module output differences.

“Get off my lawn!”

Since: Jun 11

People's Republic of VT

#25 Sep 15, 2012
Ace wrote:
<quoted text>Yes...the new micro inverters can replace the central inverter at much lower cost and avoid failures on a large scale. No need to have a backup inverter on hand. Micro inverters do a very good job and maximize power output while minimizing the effects of shading and module output differences.
"avoid failures on a large scale"?

"do a very good job"?

Care to give concrete statistics to back this up?

Or are you just another shill for the quasi-industry?
Alex

United States

#26 Sep 15, 2012
Ace wrote:
<quoted text>Yes...the new micro inverters can replace the central inverter at much lower cost and avoid failures on a large scale. No need to have a backup inverter on hand. Micro inverters do a very good job and maximize power output while minimizing the effects of shading and module output differences.
Say What????
Micro inverters are far from cost effective and are in fact one of the most expensive alternatives for residential use....
Might I suggest you pull out your Mr Wizard text book and go to the chapter on Sequenced Inverters which are being used during the manufacturing process and also available as an upgrade for central and module units.... Sequenced inverters are also the first to create a III Phase power output for commercial use....

Micro Inverters also use a liquid capacitor which are prone to
leaks whereas the sequenced inverter has removed it along with
eliminating the need for low frequency grid tracking filters....

So what you get is an inverter with all of the benefits of a micro inverter at the cost of a string inverter and the reliability to last the life of the solar system....
Ace

Cassatt, SC

#27 Sep 15, 2012
Alex wrote:
<quoted text>
Say What????
Micro inverters are far from cost effective and are in fact one of the most expensive alternatives for residential use....
Might I suggest you pull out your Mr Wizard text book and go to the chapter on Sequenced Inverters which are being used during the manufacturing process and also available as an upgrade for central and module units.... Sequenced inverters are also the first to create a III Phase power output for commercial use....
Micro Inverters also use a liquid capacitor which are prone to
leaks whereas the sequenced inverter has removed it along with
eliminating the need for low frequency grid tracking filters....
So what you get is an inverter with all of the benefits of a micro inverter at the cost of a string inverter and the reliability to last the life of the solar system....
Microinverters offer distinct advantages in flexibility, efficiency, and safety for solar photovoltaic (PV) panels, but cost-effective options have been limited in the past. In designing microinverter modules today, however, engineers can confidently rely on a broad range of solutions for implementing alternative inverter topologies that improve module efficiency, reliability, and cost. Microinverter module designers can choose from a variety of power components, integrated devices and specialized microcontrollers from parts manufacturers including Analog Devices, Fairchild Semiconductor, Littelfuse, Microchip Technologies, National Semiconductor, and Texas Instruments.
Conventional solar PV installations feed DC voltage to a central inverter for conditioning and distribution locally or across the power grid. Aside from the operational risk of this single point of failure, one shaded, dirty or malfunctioning panel can erode the efficiency of the entire array. Furthermore, the DC voltage carried through the array to the central inverter carries significant fire and safety hazards, leading to increased costs for cabling and, in turn, higher costs for installation and maintenance.
To mitigate individual panel effects, solar PV designers have moved power conversion to each individual string, or set of series-connected panels in a large array. String converters, or optimizers, provide DC-DC conversion to enhance power delivered to the central inverter by each string. This approach reduces the impact of a single poorly-performing panel to its string rather than the entire array. But such installations still need to contend with the hazards and costs associated with DC voltage transmission. Ultimately, however, the need to rely on a central inverter leaves a critical single point of failure with this approach.
String inverters eliminate the need for a central inverter by providing DC-AC conversion at the output of each string. By eliminating the central inverter and its potential as a single point of failure, this approach improves system robustness. The use of AC voltage transmission helps reduce fire and safety hazards—simplifying installation and maintenance of large arrays. As with string converters, string inverters offer incremental improvement in overall array efficiency compared to conventional central inverter installations, yet still permit a single degraded panel to have an unduly large impact on overall output.
Microinverters take the concept of string inverters to the next level - providing DC-AC conversion from each individual panel rather than an entire string. Introducing critical circuitry on the panel itself brings additional concerns for reliability, cost and complexity. Indeed, microinverters share the same requirements as larger central inverters but can safely employ components with lower ratings for use with individual PV panels .

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