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MGPTWEGB Array Frame Build with panels
#1
Well with my 15s 200P 18650 battery ….  I need to charge it.
So this is my Frame build for my panels
I have 9 Trina panels with a PCMX60 charge controller with a midnight solar comb-box...   I still need parts but it a start.

Here are some photos taken over the last few days ( after work project ) \


First things first … Auto-Cad and Beer Smile 
 

Then mapping out how to set the array...
 

Yep getting ready for some holes  . . . . 


Post cut for headers . . . . 
 

Back posts and beam . . . . 
 

Time for the front posts . . . . 
 

Holes for the posts . . . .
 

and this is how it is until I get to the next step...     Tomorrow  . . . . 
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 PowerLab 8  / KDS 7.2 / Horus X12
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#2
each hole is 36 inches deep with 3 - 80pd bags of concrete. My frost line here per code is 32 inches so I should be fine.

The wood frame just gets it up in the air a little...  I didn't want it right on the ground.  This gives me room to keep the grass under the array.
My goal is to make the rear frame adjustable... When the solar frame work is all the way down against the wood frame the angle is 74Deg. witch is my summer max angle. I was shooting for 30 deg. max angle in winter ( 28 deg is what is called for in my area ) but if I can get 30 or 32 I'm happy with that.

For this weekend I may do the lower adjustable mount on the Super Strut ( the lower front wood beam to super strut mount ) But I may not have time to work on the higher back adjustable mount. I may end up just bolting the back down solid for this weekend. and come back and finish the rear adjustment mount next weekend or when I do the cable run to the house...…   I have all the offsets for the holes so I may just drill out those holes on the main super struts …   and work on the control arms next weekend..   Just not sure what I'll be able to do this weekend. Its calling for rain on Sunday …  So this means I have tomorrow …. to get as much done as I can.   this may run into next weekend for the panels..  Just not sure yet .

At some point there will be another 9 panel array set in front of this one ….   But it will be set 35 to 45deg off center to true south. but lets get this one finished before I start chatting about the next one...  LOL

It will be nice to get my panels mounted right !!!!  LOL  not just propped up against the house and setting in my living room …..
 PowerLab 8  / KDS 7.2 / Horus X12
Gaui X3-385 Speed Heli 6S X-Nova powered . . . .Puffing Lipo's in 2 Mins
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#3
OK   UPDATE TIME !!!!
Last weekend had some time... 
 

still didn't get the last row up ….

But this weekend I was able to finish getting the panels up !
 

Ground wire and rod is in … 
3breaker box in mounted to the center 4x4 ...

Still need to run the ground lugs and the 4ga wire to all the uni-strut 
and wire the panels to there breaker … Its getting there
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 PowerLab 8  / KDS 7.2 / Horus X12
Gaui X3-385 Speed Heli 6S X-Nova powered . . . .Puffing Lipo's in 2 Mins
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#4
UPDATE !
Wires are now ran to the House !!! 
Sorry didn't take any photos …..    it was a mess but its in 

just picked up my outside disconnect …. 
I'll post photos once the disconnect box is set ..
 PowerLab 8  / KDS 7.2 / Horus X12
Gaui X3-385 Speed Heli 6S X-Nova powered . . . .Puffing Lipo's in 2 Mins
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#5
That looks great! How long did it take to dig 32" holes with that post digger? I was looking at buying one of those but seems like it would take a LONG time?
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#6
(01-17-2020, 05:51 PM)mike Wrote: That looks great! How long did it take to dig 32" holes with that post digger? I was looking at buying one of those but seems like it would take a LONG time?
@Mgptwegb - Looks great!   How many bags of concrete did you use?  and did you have trouble getting rid of excess dirt?    Its really exciting to get panels online!

For me it was a LOT of work to dig holes...  plus getting rid of extra dirt.   I used an online IronRidge array app for my design specs ( https://base.ironridge.com/gb/projects/new ) and they recommended 24" wide by 36" deep holes for class 4 soil (worst case) so an inspector would not have anything to quibble.    Took a 'day' to dig a hole using shovel + hand jack-hammer to loosen dirt.     Used 20 x 60lb bags of concrete for each hole (9,600lbs in total - ugh!)  

Pic of hand jack-hammer (but not me - I only wish I looked so strong Smile )


Here's a picture of the framework with 6 of the 8 holes dug to give context.
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#7
(01-17-2020, 05:51 PM)mike Wrote: That looks great! How long did it take to dig 32" holes with that post digger? I was looking at buying one of those but seems like it would take a LONG time?

Can't comment on those stab-tweeze diggers, but I've just dug my first shallow water well with an "Iwan" style post digger ( https://www.amazon.com/dp/B00002N8OK ). It's amazing! Dug 1m/3ft in minutes, even cutting though small roots with ease. Though I probably had the perfect sandy/gritty/no-rocks soil. Almost disappointed that it was over so fast.
One downside is that it can wobble/deflect while digging(drilling?), ending up with a crooked hole.
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#8
(01-17-2020, 07:15 PM)OffGridInTheCity Wrote: I used an online IronRidge array app for my design specs ( https://base.ironridge.com/gb/projects/new ) and they recommended 24" wide by 36" deep holes for class 4 soil (worst case) so an inspector would not have anything to quibble.

I would love to know where they come up with these numbers. A 24" wide 36" deep hole is pretty ridiculous in my opinion, but I'm not an engineer, so who am I to comment I guess lol.

(01-17-2020, 09:15 PM)ajw22 Wrote: Can't comment on those stab-tweeze diggers, but I've just dug my first shallow water well with an "Iwan" style post digger ( https://www.amazon.com/dp/B00002N8OK ).  It's amazing!  Dug 1m/3ft in minutes, even cutting though small roots with ease.  Though I probably had the perfect sandy/gritty/no-rocks soil.  Almost disappointed that it was over so fast.
One downside is that it can wobble/deflect while digging(drilling?), ending up with a crooked hole.

That looks looks like it would work pretty well. I might have to pick one up. I'm looking to redo my array in the spring.

For what it's worth, I currently have two 3x2 arrays supported by 8 tomato stakes hammered about 2ft down. I want to make sure I do it right the next time around. We've had some pretty strong wind storms since and haven't lost one yet... LOL
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#9
(01-17-2020, 09:26 PM)mike Wrote:
(01-17-2020, 07:15 PM)OffGridInTheCity Wrote: I used an online IronRidge array app for my design specs ( https://base.ironridge.com/gb/projects/new ) and they recommended 24" wide by 36" deep holes for class 4 soil (worst case) so an inspector would not have anything to quibble.

I would love to know where they come up with these numbers. A 24" wide 36" deep hole is pretty ridiculous in my opinion, but I'm not an engineer, so who am I to comment I guess lol.
Here's the design produced by IronRidge that I followed....     I agree it seemed overkill to me but IronRidge is a reputable outfit as far as I know and I just didn't want to risk any kind of redo as several are under the water tanks.       Notice some of the specs such as "Shear 433 lbs" and "Uplift -722 lbs" - we don't get tornadoes where I live but maybe it includes design for things like that.

The design allowed for your choice of 12, 16, 20, and 24" diameter holes. IF I had done 12" I would have had to go down 4' 6" and that's just for 20deg. So I went wide/shallow as I could actually dig it out.

Here's the implementation from the design from the backside
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