diy solar

diy solar

Post your Ground Mount Setup

Here you go. You can see the door hinges welded at the tops of the vertical pipes. The top side of each hinge is welded to the cross bar so the cross bar and drilled plates tilt with the panels (about the hinge pins). The tilt is set by bolts through the pipes and drilled plates. Easy enough to change the tilt; just remove the bolts and reinstall them at the new desired angle.

I can also remove the bolts and drift out the hinge pins and remove the cross bar if I need to. Easiest to do if I remove the panels first, though. I did a CAD drawing so I could minimize the gaps between the sets of panels to help shade as much as possible beneath.

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Excellent... well done, thank you! Some similarities to the DC Solar trailer racks. (See my boat/DC Solar rack trailer.)
 
No, seems you're here to argue.

My 35 year contractor experience with pressure treated wood is that the only issue to avoid is ground contact. This lumber in free air lasts a lifetime.
How many people are replacing their decks after 10 years?
Around here more often than you would think.

I built my deck out of pressure treated wood in 1996.
When I sold the house in 2004 it was still good.
I drove buy the place a few years ago and saw a new deck.
Stopped buy and asked and they said 2x12s we used for joist had started rotting.

So lasted about 15 years.

Maybe it’s the wood or the weather but decks don’t last to long around here.

The dock we made out of Trex and it’s still there.

Only reason we didn’t use Trex for the deck was cost but if you plan to stay anywhere for a while that cost might be worth it.
 
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How are your actual yields with these bi-facials mounted vertically? Do you think you are getting good results based on the power rating?
Only half year experience so far, so long way to go for final verdict. Mid-summer (25C) max yield for ~11kWp string is usually 8,5-9kW (without any cloud lensing effect) and 70kWh daily. Spring sun with snow on the ground got my Deyes to clip (12kW limit then, now with software upgrade should hopefully be 13,6kW) for 2-2,5 hours with 95kWh daily yield.

There was a two day snowstorm when my whole setup (44,1kWp) yielded 190kWh while my friend's 100kWp roof mounted got only 4kWh.

According to PVWatts I might be loosing 3-4MWh (~10%) annually because of my nearly vertical tilt (~80 degree). But for winter my array is close to ideal.
 
Old school off gridder here. 20+ years off grid and I started with a mix matched system of panels on my porch roof but after having to skinny out my window to brush the snow off (we get heavy snow) I moved to a ground mount system.

For 10 years I only had a 400 watt ground mount system and it is situated about 30 feet in front of my cabin and pointed true south with angle and tilt for best winter sun in my area. This is a fixed mount system so I don't change it for seasons.

That was connected to three 125Ah Vmax tank AGMs stored in the cabin, a Blue Sky 12 volt MPPT controller and an Energizer 500 watt mod sine inverter. That ran my laptop, 12 volt fridge, led lights, water pump and recharged gadgets and tools. I used the genny for running big tools and my microwave and washer.

Last year I added an ebike, bigger computer, more cooking appliances and I wanted to stop using the gas genny so I expanded my system to a second 400 watt system and I replaced my old AGMs with a 400Ah Enjoybot LFP, Renogy 40 amp MMPT controller, Weize 1200 watt pure sine inverter.

I also set up a 200 watt recharging station on a trailer so I can move that to get the best sun any time of year and I added some portable panels and power stations for camping or low sun days when I may need a backup instead of running the genny.

All together I have 1.4Kw of solar, 800Ah of LFP, several power stations and portable panels and now I can keep everything running and charge my ebike, run a second fridge, electric lawn mower, electric snowblower and I haven't needed the genny at all through last winter.


My mounts are just my old horse hitching posts with cinder blocks and panels are attached using high tensile electric fence wire and they have never moved an inch in very high winds. I have done zero maintenance in 10 years on the old system other than keeping the snow off and washing them off occasionally.

I just designed an adjustable pole mount system I want to try with some bifacial panels next year and that is the diagrams if someone wants to build one.

I am 60 now and not safe to get on a roof so ground mount is absolutely the best choice for me and with the correct angle and tilt you get more output from a smaller system than a poorly situated roof mount!

400 watt system.jpg 200 watt solar power.PNG VID_20231009_112924706_exported_15771.jpg

Pole Mount1.png Pole Mount2.png Me snowblower.png
 
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More info here:

I like this.
Good defense against haill and snow.
I'm thinking of giving up efficiency and do both sides facing east and west.
 
DIY everything to keep costs down.

63 x Bluesun 700W Bifacials in 21 sets each having 2,1/1,5kWp, total 44,1/31,5kWp front/back. The whole idea was to avoid shadows on either side with vertical installation to maximize winter production and keep snow off. This was my first take on solar and has only been working for 5 months now, so hard to tell how good or bad it is. We have over 19 hours of sun around mid summer, so plenty of production even with fixed tilt.

Used CCA treated old electric poles hammered (not dug) 2m deep with excavator and insulated to withstand ground frost, no concrete. Frames are made from 40x40x3mm marine grade aluminium and welded together (there are water drainage holes). Each frame has three panels glued to it (and to each others) and weights 150kg. Glue is UV protected heavy equipment windshield glue with primer. This way each frame is very rigid even being 4m x 2,8m in size. Ground clearance is 1m. Tilt is not totally vertical, but ~80 degree which is optimal for winter here and maybe slightly better with summer production.

My main concern is pole movement and high winds. So far it has survived 29m/s (65MPH) wind. Keeping fingers crossed...

Frontside
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Backside
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Set of three panels. Black windshield glue is visible.
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Homemade SS fasteners to allow pole movement. Mudflap rubber to reduce movement and sound.
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I like it. I thought of vertical mount for my project as well.
Link the poles together for added strength.
Link them under the panels and two steel cables higher at the level of the panels.
 
I'll be 57 this winter. I spent all day felling trees yesterday and part of Saturday, some over 5 feet in diameter. Blocked out all the tops, the saw logs might go to the sawmill.

I still climb roofs. Still do about everything I did in my 30's and 40's.

Do I feel "old" in the morning? Certainly can aggravate some long term injuries.

My rheumatologist say they want me to remain active with my rheumatoid arthritis, I don't seem to disappoint. I'll do my cardio this morning too.

Don't let yourself fall into the "I'm too old".
I made it to 62'
To each his/her own.
This is my idea of fun.
 

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30-Canadian bifacial 390w
5S-6P
4- 2"x2" steel posts in concrete
2x12 beams
2x6 stringers
Unistrut
Damn, that looks like an amazing sweet set up! Would love to see it sometime if you'd be open to it- I'm also in Mesa, AZ
 
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