Solar Power

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rick
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Re: Solar Power

Post by rick » May 27, 2019, 2:03 pm

Well done!



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maaka
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Re: Solar Power

Post by maaka » May 27, 2019, 3:59 pm

Thanks Mate...its only small fry...2x 40 panels, 40 ah acid battery, 30a Controller, left room to add another panel, for 12v music, water pump etc..will replace Controller with a new one I bought downunder, as it has two USB ports for cell phone charging, or other 5v things..

making small changes for the future, own power own water, ..wandered around with a couple of metal rods the other day, and found water near the house, bored down to finally find it at 60m.

glalt
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Re: Solar Power

Post by glalt » May 27, 2019, 4:28 pm

I may not live long enough for my systems to pay for themselves, BUT, when the neighborhood goes black, I still have electricity. My router and computer just keep working like nothing happened. Yes, I have spent a lot of money but at least for me, it is worth every baht. I just spent 1,850 baht for a new AVR for the farm generator. I still need to get the one at the house repaired.

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parrot
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Re: Solar Power

Post by parrot » June 1, 2019, 2:06 pm

I've seen this company's truck in/around town a few times. Although from Khonkaen, they apparently do work in Udon. From their website:
"Solartech Center Ltd., Solartech Center Ltd., located at 166 Moo 1, Ban Khok Subdistrict, Nong Na Kham District, Khon Kaen 40150. We are the importer and distributor of solar cell solar panels, solar panels. At the cheapest price What we consider most is Product quality As well as customer satisfaction Under the cheaper price than the general market We import and produce products that are legal. We focus on being a reliable online store and selling products. At the most reasonable price, our products are high quality products compared to the price. Rest assured in the quality system RoHS, CE and ISO9001 accepted worldwide. We are a distribution center. Solar energy Cheap solar cell solar cell panels that you can trust in quality and price. All products of our shop are guaranteed for 1 year. "
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Re: Solar Power

Post by Gudon » June 5, 2019, 6:11 pm

Hi
I know this is an old thread but I am seriously considering a solar/pea system in Udon and would be great to meet you and learn some basics
Gordon

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fhorst
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Re: Solar Power

Post by fhorst » November 17, 2019, 8:39 am

Sorry for the late response...

About solar :-)
Yes we/I have
Whooping 27 X 330w panels. Good start quality.
And price is low (3.300 THB)
We bought in 3 different times, as we know the shop from online store... Better safe then sorry.
Transport price 500 THB per 2 panels.
Total costs was 95.850 THB

The lady is friendly, can read good English (reply in Thai)
https://www.9solarcell.com/

We also purchased our batteries there.
Again, a whooping 3.200ah (at 12v)
Lol
16 X 200ah Globatt deep cycle solar batteries.
Type "Pace" again, really good price: 7700 TH BHB
Setup in 4*4= 48v with 800ah, total of about 35kwh (= use 35 hours 1000w power)
(Not to advice as 90% discharge will shorten lifespan!!)
(also purchased in batches)

Transport costs per battery where 200 baht.
Batteries are new production, not long shelved.

For solar panels, you never know till after 15 years.
All I can say is that the horror stories of really bad panels haven't been around for over a decade.
Most panels are good quality.

Batteries is always difficult and different story.
Your storage temperature, your DOD (do you discharge deep or shallow), do you do absorption stage Avery few months?

For me, I have separate room for batteries, it have crazy good insulation and own air-conditioning..

The investment, 16 *7900= 126.400THB is worth protecting.
According to internet (even Wikipedia)
Battery live goes half per 5 degrees up, starting at 20.
@ 20c, +5 years
@ 25c + 3
@ 30c + 1.5
@ 35c +1 year.
That is enough difference to make the air-conditioning a good investment.
Spend every 2 or every 5 years 125k THB.....


My MPPT are 3 x 60A POWMR. From China, AliExpress.
About 75 USD each. They are loud (small fan) but work quite good.

For inverters, I'm not so lucky.

I bought 2* 6kw GaiaDefender (AliExpress) 600 USD each, include transport.
They are quality build, and give clean energy (not a lot distortion)
Sadly it have 1 ventilator. And that quality, while this brand (NMB) normally only high quality products, they fail. A lot.
Also, heat management problem, with low loads, under 500w, the Ventilator does not start at all.

3 times send back to China for repairs (repair free, costs 300usd for transport and tax (yes pay tax always) And one time repair myself.
Even bought extra one for spare / hot swap..

I decided that this have to stop.
I've got one "working" left (give between 180 and 190v) the rest is burned.

Now I'm looking at combination unit (MPPT and Inverter) as it can give good feedback on power production and usage.
Maybe 2 * 3.2kw "Revo II" :
https://www.soropower.com/products/Inverter/7/696.html
About 1100 for 2 incl. WiFi, parallel and nice phone app.
Or a real proffecional looking one:
https://www.mppsolar.com/v3/mpi-hybrid-series-2/
(The 5kw unit.)
About 1400 USD for the 5kw inc. WiFi

5 KW is on the low side.
It would require power usage management.
Our submersible pump draws 2.5kw.
It doesn't run all day, only a few times a few minutes to top up the 1500l tank.
Unless we need many water for irrigation.

With half left.. there is not much room for the rest.
(5* 9000btu/540w air-conditioning, refrigerator, and all other small stuff)

Not sure yet.
I keep you guys posted.

My batteries stay full, only shallow discharge at night and are fully recharged at noon.

They are polycrystal panels, on clouded days each panel still deliver about 50watts.

And, coming from Holland, (land of the mills and tulip) we have 4 small wind turbine 800w each.

Commercial controllers need too high wind speeds to start, I'm building my own MPPT wind turbine controller now. Adruino based.
(You can Google, and find. Developed by Frenchman, Phillipe.)

All parts come from China, they take long time to arrive.
Phillipe's results are promising.
If it can't be done, it never happened..

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Re: Solar Power

Post by glalt » November 17, 2019, 10:51 am

I now have four small solar systems. The largest using four 250 watt poly panels and four 225 AH 6 volt golf cart batteries connected to give twelve volts. All the systems have been amazingly trouble free. One GAIA 1,500 watt inverter failed and it was replaced immediately with no need to return the one that failed. I use four GAIA inverters. All my charge controllers are EP Solar MPPT Tracers and none have failed. I use only twelve volt systems because many things like my security system, router and light bulbs run on twelve volts and are connected directly to the battery banks.

I'm of the opinion that multiple small systems are better than a single large system because spares are cheap and if a system does fail, I still have some power. I do have a spare charge controller and inverter. Fortunately, even after all these years I have not needed the spares except for one inverter that I used until the defective GAIA was replaced. Charge controllers and inverters were all purchased through AliExpress and batteries and panels were purchased locally.

Maybe I should add that I never found Internet recommendations as far as sizing components to be accurate. I have double the panels recommended and they are able to keep the batteries charged on rainy or cloudy days. My inverters are also double sized because I have found that running inverters near maximum output causes them to get hot. I also have a small computer fan mounted below my largest system charge controller because it too was getting hot. According to the "experts" oversize components are not as efficient. I am more interested in long life rather than optimum efficiency.

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fhorst
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Re: Solar Power

Post by fhorst » November 17, 2019, 8:43 pm

:-)

I couldn't agree more.
My system is also highly over capacity.
This to ensure long life.

4 lines of 4 12v batteries parallel and series give the same redundancy as 4 separate system.

Same goes for my original 2* GAIA, later 3*.
Sadly the 6000w unit is not as lasting as it's smaller brothers.

My 3* 60A MPPT also provide the Redundancy,

This is why I'm little "scared" to choose the high quality looking 28kg 5kw unit.
What if it fails?

I tried today to build with 2 scrapped GAIA to make a working one.
Tomorrow I can test.

I really hope it will work!
Makes me less worried to buy the bulky 5kw or the 2* 3.2kw.

Why still one system?
I really like to know our real usage and production.
And, how our battery array is holding up.

16* 200ah really should be enough.
And most days it truely is.
Some days.. I go below 40% (I made warning system that beeps)
And I like to get a grasp on what and why.

Monitoring software will give this information.

Pricing between 1 and 1500 USD is ok.
The big brother of 10kw is 2300.. (45kg)
I'm not a poor man, there are limits :-)
If I choose the 5kw, o can always decide to do parallel with additional unit.
If it can't be done, it never happened..

glalt
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Re: Solar Power

Post by glalt » November 17, 2019, 9:28 pm

When my 1,500 watt inverter failed, GAIA replaced it quickly and didn't ask me to send the defective one back. I went ahead and replaced the blown capacitor and hoped for it to work. It didn't work. Apparently that was not the only problem. I then salvaged some things and the fan runs 24/7 cooling a charge controller. I still have more fans from scrapped computers. Yes, I'm somewhat of a pack rat.

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kopkei
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Re: Solar Power

Post by kopkei » November 18, 2019, 9:49 am

when i read all this over solar power , i still do not see the advantages by investing in such an expensive exploit that will give you a lot headache about repairs and defects and will not give you any profit compared to your normal electric bill?
please enlighten me on this one ?.... :-k

glalt
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Re: Solar Power

Post by glalt » November 18, 2019, 11:27 am

kopkei wrote:
November 18, 2019, 9:49 am
when i read all this over solar power , i still do not see the advantages by investing in such an expensive exploit that will give you a lot headache about repairs and defects and will not give you any profit compared to your normal electric bill?
please enlighten me on this one ?.... :-k
If you were on my portion of the electric grid, you would easily understand. It truly stinks. I didn't build my systems with any intent to save money. I built them to try to keep my sanity. At first UPS units were used but that was an expensive mistake. They worked for maybe an hour before the low battery warning. Large units are expensive and don't have nearly the life of my solar components. When our village goes dark, my power is still on. I don't regret any of the costs to build my systems.

I also have a small generator for many hour long blackouts. It eats a lot of benzine and is noisy. My solar will run the fridge and a freezer but only for a couple hours when the sun goes down.

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fhorst
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Re: Solar Power

Post by fhorst » November 24, 2019, 11:36 pm

For me....
We have no grid.
No alternative.
Closest connection option is 8 km from our home.

It would cost million to get the grid connection.

Some good news,
I fixed one of the GAIA inverter, it is having additional ventilator strapped to it in case of an other fan failure.

The new inverter will be 3* the Revo II, each 3.2kw, parallel.
Not the heavyweight 29kg 5kw.
After studying it appears that it is also high frequency inverter, it does have additional ferrite "clamps", but the rest is mostly standard 5kw Inverter.
Weight is from the external iron casing., Amongst other more normal.
Besides that it ain't that special, the 10kw solar is actually 2*5kw.
Sadly my panels can be 18 and 9 or 3 * 9.
18 * 325 = too high. (I've seen 5400 top)

Makes the choice easy. I need 3 MPPT connection.
Price wise the Revo II is even cheaper with 3 * 3.2kw!
I'll let you know how it works out.
If it can't be done, it never happened..

glalt
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Re: Solar Power

Post by glalt » November 25, 2019, 9:03 am

I'm always surprised that appliance manufacturers have not tapped into DC powered appliances, especially air conditioners. The newer inverters convert AC to DC anyways. Changing heavy power using devices to DC would eliminate a lot of problems and expense for solar systems.

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fhorst
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Re: Solar Power

Post by fhorst » November 26, 2019, 8:29 am

There are solar air-conditioning...
Sold sadly almost only as a set with solarpanels.

It would be strange to to the DC to AC to DC on special made for :-)

And while it does have less parts, they are a lot more expensive!
Even if you deduct the solar panel.
Even more strange, as they're supposed to work on low power, their SEER rating is not even close to the standard AC.

Car Air-conditioning system run DC direct.
Not the already built in (ok they also run DC) but the external units, like for truck, have really bad SEER.

Mine have 23.76 (no typo)
While 26 is available in some countries, not yet in Thailand. (6 months ago)

Always trade-off, I was lucky to get my 5 Daikin 9000 btu for a good price.

They use 540 watts on 9000BTU, turbo /boost is 850 watt but also 11.500 BTU!
If it can't be done, it never happened..

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Re: Solar Power

Post by Marcosteffano » November 26, 2019, 11:13 am

I get a lot of blackouts here in the village.just built one of these with a 80amp battery that I can double or triple up giving me 240amp.simple bit of kit that I charge up on the mains.ive tested the 80amp version and can run a fan,wifi and light for 8 hours without draining the battery right down.when the power is out I just roll it out and can plug in what I need.if I have the 240amp version can even watch the big tv for up to 6 hours too.no petrol and noise of a generator.no solar but could have if I wanted to add it.80amp cost me 3,200b,240amp cost 8,300b.
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Re: Solar Power

Post by glalt » November 26, 2019, 12:26 pm

Air conditioners are a mystery to me. My bedroom has a 9.000 BTU Samsung that is more than ten years old. It still works great. Of course it is only used at night time. During hot days I turn it on for a half hour before we go to bed. The room is nicely cooled when we go to bed.

I bought a Panasonic 12,000 BTU inverter for my computer room. That room is exactly the same size as the bedroom with the additional benefit of being shaded on three sides. I was never satisfied with how it worked. After one year when the warranty expired, it gave a fault number and quit working. They wanted 7,000 baht plus a service call to replace the main circuit board. Since it never did work properly I told them to forget it. I replaced it with a 12,000 BTU LG. It apparently works properly but won't cool the room any faster or even as fast than the ancient 9,000 BTU Samsung.

I bought the inverter because of the soft start with no huge surge for my solar system. The solar will run it during the day but my system is too small to run it as much as needed. The bottom line is that I won't buy another inverter. I don't trust the ratings. I recently replaced the unit in my condo bedroom with a conventional 10,200 BTU LG and it works great. The original condo bedroom unit was 14,000 and it didn't cycle enough to remove the humidity. My wood cabinets would get mildewed.

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fhorst
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Re: Solar Power

Post by fhorst » November 29, 2019, 11:13 am

I do thrust inverter type, the main difference is that it is build to work 24/7.
Non inverter is more start - boost - stop system.

My 9000 BTU cools our bedroom and bathroom without any issues.
(Bathroom 3 * 3, bedroom 3* 5 meter)
I do say, it's running 24/7.

We have tick walls great insulation.
Ceiling have insulation.

With out solar panels, no problems :-)

Then again...
Daikin does have a name to keep up high.
If it can't be done, it never happened..

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Re: Solar Power

Post by bluejets » November 30, 2019, 8:52 am

I looked at solar for our place near Khon Kaen but cost is prohibitive.
To be useful the system would need to be battery backup as in Glalt system.
Down in Aus, we get Gov. concession and the AU$12,000 22 panel 5Kw cost me a bit over $4,000. This plus I had to upgrade my switchboard but, being an electrical contractor, the cost was just materials. In general it generates approx. 28 to 32 units a day and use is 14.
As a plus there are also the buy back at around 10c/unit, not great as compared to the 25c/unit fee for incoming but something at least. And before anyone jumps on the wagon about meter running backwards, doesn't happen here since smart meters were introduced.
Battery systems can be as much as AU$20,000 on top again.
I am surprised that the Thai gov has not started a similar incentive system. There seems many solar farms popping up everywhere but perhaps they are foreign owned.
Glalt, wondered perhaps your inverter unit was crook right from the word go as they do work efficiently in my experience. Best point being the soft start especially in Thailand where the mains size is calculated on the pocket capacity rather than any maximum demand and voltage drop calculations.

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Re: Solar Power

Post by glalt » November 30, 2019, 12:38 pm

I'm certain that the Panasonic was never working properly since the day it was installed. Home Pro servicemen came a couple times and said it was fully charged and working properly. Just after the warranty expired, it died. Panasonic Thailand would never even bother to reply to my several complaints.

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kopkei
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Re: Solar Power

Post by kopkei » December 7, 2019, 10:18 am

this morning @ dohome...
IMG_20191207_090116[1] (Copy).jpg
IMG_20191207_090105[1] (Copy).jpg
as info... ;)

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