Virtual Tracker panel arrangement

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Re: Virtual Tracker panel arrangement

Postby Bman » Wed Feb 10, 2016 5:53 pm

If I was to go the Virtual Tracker route, on this house http://i1316.photobucket.com/albums/t60 ... xeb3zr.jpg
would I need to change the angle of the panels to 60°, or is 45°be acceptable?
Or, would I be better of facing north on this corner area on the ground?
http://i1316.photobucket.com/albums/t60 ... lf19wz.jpg
The house is stand alone off grid, so no concerns about FiT, only having batteries charged(probably LiFePo4)
Is also going to be our full time home, not a holiday house. Only shade on the roof is late late afternoon.
No shade on the ground.
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Re: Virtual Tracker panel arrangement

Postby Gordon-Loomberah » Wed Feb 10, 2016 9:49 pm

45deg slope will work, but it will have a bit of a central peak and less output in early morning/late afternoon, rather than being nearly flat output all day. However, since you have the space, why not ground mount, where they are easier to clean? You can face them ENE and WNW (better than directly E and W as discussed earlier in this thread) on a ground mount quite easily, north facing will get you more output, but if you can't make use of it, there is no point in facing them all north.
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Re: Virtual Tracker panel arrangement

Postby australsolarier » Fri Apr 08, 2016 10:31 am

the question of mounting aluminium frames on galvanized steel has come up on this thread before,

i have done this ten years ago and not noticed anything adverse. some of the galvanized bolts went a bit rusty though, but nothing to worry about for the next 100 years. (those bolts do not touch aluminium though, only the galvanized frame.)

in water tanks copper and stainless steel seems to be compatible too.
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Re: Virtual Tracker panel arrangement

Postby Warpspeed » Mon Apr 25, 2016 12:01 pm

I thought I might try some 8mm x 15mm nylon bolts, nylon nuts, and a nylon washer between panel and painted steel frame.
Chinese e-bay of course and not expensive.
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Re: Virtual Tracker panel arrangement

Postby Singlepot » Tue Mar 21, 2017 5:24 am

Very interesting! Many thanks.
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Re: Virtual Tracker panel arrangement

Postby Monkeytom » Mon Jul 03, 2017 12:50 pm

I was thinking of increasing my vt setup currently I have a 2 kW inverter and fit contract. What do you guys think of switching different strings of panels? EG. 2kw string east at 60 deg. Original 2kw string north at 32 deg.
And 2kw string west at 60. These seperate strings would be switched at the appropriate time of day so only one string was connected to the inverter, That way would not overdrive the inverter or bend the rules thoughts?
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Re: Virtual Tracker panel arrangement

Postby Gordon-Loomberah » Tue Jul 04, 2017 12:01 pm

You'd have to check your FiT contract details regarding adding any more panels. You may have to get an approval regarding switching the arrays, I don't know if that is allowed or not.

You can put 30% more PV on an inverter than its rating, but the people who made up that rule clearly had not thought of a virtual tracker type array that avoids excessively high input to the inverter, but allows full output over a much longer time span.

EDIT: it's actually 33%
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Re: Virtual Tracker panel arrangement

Postby davidg » Tue Jul 04, 2017 3:53 pm

Monkeytom wrote:I was thinking of increasing my vt setup currently I have a 2 kW inverter and fit contract.


N.B. If in Victoria on a PFIT, you cannot alter the size of your array. That's one of the conditions of the PFIT.
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Re: Virtual Tracker panel arrangement

Postby Warpspeed » Tue Jul 04, 2017 4:18 pm

Yup..........................
The game is fixed and rigged by the ever changing house rules.

FIT steadily decreases, and they are now becoming really hostile about installing Lithium batteries.

The energy providers (and their shareholders) expect a profit that increase every single year.
And the bought and paid for whore politicians will change the rules whenever they are told to change the rules to guarantee the energy providers a steadily increasing income year by year which they feel they are entitled to.

Anyone that comes up with an idea that reduces the income of the energy providers is a disreputable criminal outlaw and must be made an example of.

How dare you even come up with such a suggestion that might harm their business !!
You should be ashamed of yourself.
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Re: Virtual Tracker panel arrangement

Postby Monkeytom » Tue Jul 04, 2017 6:06 pm

Yes its getting harder to do the right thing... I am concerned and do not want to loose my $0.50 cent $0.44+$0,06 Qld FIT as its meant to go till 2028, but as the goal posts are continually being moved, I am trying to think what I can do to maximise my FIT and keep it legal.
So if you can put 30% more solar PV watts total than your contract (2KW) that would be 2600 watts of name plate PV watts,
what I was thinking is two strings of 5 x 250 watt panels in parallel,
one string fixed inclined at 30 deg and facing 15 deg and a second string of 5 x 250 watt on a Horizon to Horizon motorised mount with a axe single axis tracker which I have but have never got around to setup, This was planned and in the original drawings and in my original solar quotation.
As 10 x 250 watt panels will equal 2500 watts of PV and the panels to be used are 3 year old ET-M660250 they will have lost there as new edge, I should be well with in the 30% rule, more like 25% less ageing loss.
the Inverter I have is a CMS2000 which says 2200 watts max output, which should only happen around midday in summer with freshly washed clean panels,
I have installed a muffin fan under the CMS2000 and it now runs cool as a cucumber at near full output.
I will need to check a few things currently have 2 strings of 6x 190 watt 72 cell that's 432 cells about 216 volt strings, with the possible new setup its 5 x 60 cell 300 cells or about 150 volt, I need to check the mppt window on the CMS2000, any thoughts regards Tom
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